[Bug 420930] Use Charset to specify character encoding

Signed-off-by: Mikhail Mazursky <mikhail.mazursky@gmail.com>

jetty-client/src/main/java/org/eclipse/jetty/client/HttpContentResponse.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.client;
 
 import java.io.UnsupportedEncodingException;
+import java.nio.charset.StandardCharsets;
 import java.nio.charset.UnsupportedCharsetException;
 import java.util.List;
 
@@ -92,13 +93,20 @@ public class HttpContentResponse implements ContentResponse
     public String getContentAsString()
     {
         String encoding = this.encoding;
-        try
+        if (encoding == null)
         {
-            return new String(getContent(), encoding == null ? "UTF-8" : encoding);
+            return new String(getContent(), StandardCharsets.UTF_8);
         }
-        catch (UnsupportedEncodingException e)
+        else
         {
-            throw new UnsupportedCharsetException(encoding);
+            try
+            {
+                return new String(getContent(), encoding);
+            }
+            catch (UnsupportedEncodingException e)
+            {
+                throw new UnsupportedCharsetException(encoding);
+            }
         }
     }
 

jetty-client/src/main/java/org/eclipse/jetty/client/util/BasicAuthentication.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.client.util;
 
 import java.net.URI;
+import java.nio.charset.StandardCharsets;
 
 import org.eclipse.jetty.client.HttpClient;
 import org.eclipse.jetty.client.api.Authentication;
@@ -73,8 +74,7 @@ public class BasicAuthentication implements Authentication
     @Override
     public Result authenticate(Request request, ContentResponse response, HeaderInfo headerInfo, Attributes context)
     {
-        String encoding = StringUtil.__ISO_8859_1;
-        String value = "Basic " + B64Code.encode(user + ":" + password, encoding);
+        String value = "Basic " + B64Code.encode(user + ":" + password, StandardCharsets.ISO_8859_1);
         return new BasicResult(headerInfo.getHeader(), uri, value);
     }
 

jetty-client/src/main/java/org/eclipse/jetty/client/util/BufferingResponseListener.java

@@ -20,6 +20,8 @@ package org.eclipse.jetty.client.util;
 
 import java.io.UnsupportedEncodingException;
 import java.nio.ByteBuffer;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.nio.charset.UnsupportedCharsetException;
 import java.util.Locale;
 
@@ -130,7 +132,7 @@ public abstract class BufferingResponseListener extends Response.Listener.Empty
     {
         String encoding = this.encoding;
         if (encoding == null)
-            encoding = "UTF-8";
+            return getContentAsString(StandardCharsets.UTF_8);
         return getContentAsString(encoding);
     }
 
@@ -150,4 +152,14 @@ public abstract class BufferingResponseListener extends Response.Listener.Empty
             throw new UnsupportedCharsetException(encoding);
         }
     }
+
+    /**
+     * @param encoding the encoding of the content bytes
+     * @return the content as a string, with the specified encoding
+     * @see #getContentAsString()
+     */
+    public String getContentAsString(Charset encoding)
+    {
+        return new String(getContent(), encoding);
+    }
 }

jetty-client/src/main/java/org/eclipse/jetty/client/util/DigestAuthentication.java

@@ -20,6 +20,7 @@ package org.eclipse.jetty.client.util;
 
 import java.net.URI;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.util.ArrayList;
@@ -217,14 +218,13 @@ public class DigestAuthentication implements Authentication
             if (digester == null)
                 return;
 
-            Charset charset = Charset.forName("ISO-8859-1");
             String A1 = user + ":" + realm + ":" + password;
-            String hashA1 = toHexString(digester.digest(A1.getBytes(charset)));
+            String hashA1 = toHexString(digester.digest(A1.getBytes(StandardCharsets.ISO_8859_1)));
 
             String A2 = request.method() + ":" + request.getURI();
             if ("auth-int".equals(qop))
                 A2 += ":" + toHexString(digester.digest(content));
-            String hashA2 = toHexString(digester.digest(A2.getBytes(charset)));
+            String hashA2 = toHexString(digester.digest(A2.getBytes(StandardCharsets.ISO_8859_1)));
 
             String nonceCount;
             String clientNonce;
@@ -241,7 +241,7 @@ public class DigestAuthentication implements Authentication
                 clientNonce = null;
                 A3 = hashA1 + ":" + nonce + ":" + hashA2;
             }
-            String hashA3 = toHexString(digester.digest(A3.getBytes(charset)));
+            String hashA3 = toHexString(digester.digest(A3.getBytes(StandardCharsets.ISO_8859_1)));
 
             StringBuilder value = new StringBuilder("Digest");
             value.append(" username=\"").append(user).append("\"");

jetty-client/src/main/java/org/eclipse/jetty/client/util/StringContentProvider.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.client.util;
 
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 
 import org.eclipse.jetty.client.api.ContentProvider;
 
@@ -32,7 +33,7 @@ public class StringContentProvider extends BytesContentProvider
 {
     public StringContentProvider(String content)
     {
-        this(content, "UTF-8");
+        this(content, StandardCharsets.UTF_8);
     }
 
     public StringContentProvider(String content, String encoding)

jetty-client/src/test/java/org/eclipse/jetty/client/GZIPContentDecoderTest.java

@@ -26,6 +26,7 @@ import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.nio.ByteBuffer;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.zip.GZIPInputStream;
 import java.util.zip.GZIPOutputStream;
 
@@ -59,7 +60,7 @@ public class GZIPContentDecoderTest
             data += data;
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         GZIPOutputStream output = new GZIPOutputStream(baos);
-        output.write(data.getBytes("UTF-8"));
+        output.write(data.getBytes(StandardCharsets.UTF_8));
         output.close();
         byte[] bytes = baos.toByteArray();
 
@@ -68,7 +69,7 @@ public class GZIPContentDecoderTest
         int read;
         while ((read = input.read()) >= 0)
             baos.write(read);
-        assertEquals(data, new String(baos.toByteArray(), "UTF-8"));
+        assertEquals(data, new String(baos.toByteArray(), StandardCharsets.UTF_8));
     }
 
     @Test
@@ -91,13 +92,13 @@ public class GZIPContentDecoderTest
 
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         GZIPOutputStream output = new GZIPOutputStream(baos);
-        output.write(data.getBytes("UTF-8"));
+        output.write(data.getBytes(StandardCharsets.UTF_8));
         output.close();
         byte[] bytes = baos.toByteArray();
 
         GZIPContentDecoder decoder = new GZIPContentDecoder();
         ByteBuffer decoded = decoder.decode(ByteBuffer.wrap(bytes));
-        assertEquals(data, Charset.forName("UTF-8").decode(decoded).toString());
+        assertEquals(data, StandardCharsets.UTF_8.decode(decoded).toString());
     }
 
     @Test
@@ -107,7 +108,7 @@ public class GZIPContentDecoderTest
 
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         GZIPOutputStream output = new GZIPOutputStream(baos);
-        output.write(data.getBytes("UTF-8"));
+        output.write(data.getBytes(StandardCharsets.UTF_8));
         output.close();
         byte[] bytes = baos.toByteArray();
 
@@ -121,7 +122,7 @@ public class GZIPContentDecoderTest
         ByteBuffer decoded = decoder.decode(ByteBuffer.wrap(bytes1));
         assertEquals(0, decoded.capacity());
         decoded = decoder.decode(ByteBuffer.wrap(bytes2));
-        assertEquals(data, Charset.forName("UTF-8").decode(decoded).toString());
+        assertEquals(data, StandardCharsets.UTF_8.decode(decoded).toString());
     }
 
     @Test
@@ -131,7 +132,7 @@ public class GZIPContentDecoderTest
 
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         GZIPOutputStream output = new GZIPOutputStream(baos);
-        output.write(data.getBytes("UTF-8"));
+        output.write(data.getBytes(StandardCharsets.UTF_8));
         output.close();
         byte[] bytes = baos.toByteArray();
 
@@ -143,7 +144,7 @@ public class GZIPContentDecoderTest
 
         GZIPContentDecoder decoder = new GZIPContentDecoder();
         ByteBuffer decoded = decoder.decode(ByteBuffer.wrap(bytes1));
-        assertEquals(data, Charset.forName("UTF-8").decode(decoded).toString());
+        assertEquals(data, StandardCharsets.UTF_8.decode(decoded).toString());
         assertFalse(decoder.isFinished());
         decoded = decoder.decode(ByteBuffer.wrap(bytes2));
         assertEquals(0, decoded.remaining());
@@ -157,7 +158,7 @@ public class GZIPContentDecoderTest
 
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         GZIPOutputStream output = new GZIPOutputStream(baos);
-        output.write(data.getBytes("UTF-8"));
+        output.write(data.getBytes(StandardCharsets.UTF_8));
         output.close();
         byte[] bytes = baos.toByteArray();
 
@@ -171,7 +172,7 @@ public class GZIPContentDecoderTest
         ByteBuffer decoded = decoder.decode(ByteBuffer.wrap(bytes1));
         assertEquals(0, decoded.capacity());
         decoded = decoder.decode(ByteBuffer.wrap(bytes2));
-        assertEquals(data, Charset.forName("UTF-8").decode(decoded).toString());
+        assertEquals(data, StandardCharsets.UTF_8.decode(decoded).toString());
     }
 
     @Test
@@ -180,14 +181,14 @@ public class GZIPContentDecoderTest
         String data1 = "0";
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         GZIPOutputStream output = new GZIPOutputStream(baos);
-        output.write(data1.getBytes("UTF-8"));
+        output.write(data1.getBytes(StandardCharsets.UTF_8));
         output.close();
         byte[] bytes1 = baos.toByteArray();
 
         String data2 = "1";
         baos = new ByteArrayOutputStream();
         output = new GZIPOutputStream(baos);
-        output.write(data2.getBytes("UTF-8"));
+        output.write(data2.getBytes(StandardCharsets.UTF_8));
         output.close();
         byte[] bytes2 = baos.toByteArray();
 
@@ -198,11 +199,11 @@ public class GZIPContentDecoderTest
         GZIPContentDecoder decoder = new GZIPContentDecoder();
         ByteBuffer buffer = ByteBuffer.wrap(bytes);
         ByteBuffer decoded = decoder.decode(buffer);
-        assertEquals(data1, Charset.forName("UTF-8").decode(decoded).toString());
+        assertEquals(data1, StandardCharsets.UTF_8.decode(decoded).toString());
         assertTrue(decoder.isFinished());
         assertTrue(buffer.hasRemaining());
         decoded = decoder.decode(buffer);
-        assertEquals(data2, Charset.forName("UTF-8").decode(decoded).toString());
+        assertEquals(data2, StandardCharsets.UTF_8.decode(decoded).toString());
         assertTrue(decoder.isFinished());
         assertFalse(buffer.hasRemaining());
     }
@@ -215,7 +216,7 @@ public class GZIPContentDecoderTest
             data += data;
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         GZIPOutputStream output = new GZIPOutputStream(baos);
-        output.write(data.getBytes("UTF-8"));
+        output.write(data.getBytes(StandardCharsets.UTF_8));
         output.close();
         byte[] bytes = baos.toByteArray();
 
@@ -225,7 +226,7 @@ public class GZIPContentDecoderTest
         while (buffer.hasRemaining())
         {
             ByteBuffer decoded = decoder.decode(buffer);
-            result += Charset.forName("UTF-8").decode(decoded).toString();
+            result += StandardCharsets.UTF_8.decode(decoded).toString();
         }
         assertEquals(data, result);
     }
@@ -238,7 +239,7 @@ public class GZIPContentDecoderTest
             data += data;
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         GZIPOutputStream output = new GZIPOutputStream(baos);
-        output.write(data.getBytes("UTF-8"));
+        output.write(data.getBytes(StandardCharsets.UTF_8));
         output.close();
         byte[] bytes = baos.toByteArray();
 
@@ -249,7 +250,7 @@ public class GZIPContentDecoderTest
         {
             ByteBuffer decoded = decoder.decode(ByteBuffer.wrap(new byte[]{buffer.get()}));
             if (decoded.hasRemaining())
-                result += Charset.forName("UTF-8").decode(decoded).toString();
+                result += StandardCharsets.UTF_8.decode(decoded).toString();
         }
         assertEquals(data, result);
         assertTrue(decoder.isFinished());
@@ -263,12 +264,12 @@ public class GZIPContentDecoderTest
             data1 += data1;
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         GZIPOutputStream output = new GZIPOutputStream(baos);
-        output.write(data1.getBytes("UTF-8"));
+        output.write(data1.getBytes(StandardCharsets.UTF_8));
         output.close();
         byte[] bytes1 = baos.toByteArray();
 
         String data2 = "HELLO";
-        byte[] bytes2 = data2.getBytes("UTF-8");
+        byte[] bytes2 = data2.getBytes(StandardCharsets.UTF_8);
 
         byte[] bytes = new byte[bytes1.length + bytes2.length];
         System.arraycopy(bytes1, 0, bytes, 0, bytes1.length);
@@ -281,12 +282,12 @@ public class GZIPContentDecoderTest
         {
             ByteBuffer decoded = decoder.decode(buffer);
             if (decoded.hasRemaining())
-                result += Charset.forName("UTF-8").decode(decoded).toString();
+                result += StandardCharsets.UTF_8.decode(decoded).toString();
             if (decoder.isFinished())
                 break;
         }
         assertEquals(data1, result);
         assertTrue(buffer.hasRemaining());
-        assertEquals(data2, Charset.forName("UTF-8").decode(buffer).toString());
+        assertEquals(data2, StandardCharsets.UTF_8.decode(buffer).toString());
     }
 }

jetty-client/src/test/java/org/eclipse/jetty/client/HttpClientContinueTest.java

@@ -21,6 +21,7 @@ package org.eclipse.jetty.client;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 import java.util.Iterator;
 import java.util.List;
 import java.util.concurrent.CountDownLatch;
@@ -60,13 +61,13 @@ public class HttpClientContinueTest extends AbstractHttpClientServerTest
     @Test
     public void test_Expect100Continue_WithOneContent_Respond100Continue() throws Exception
     {
-        test_Expect100Continue_Respond100Continue("data1".getBytes("UTF-8"));
+        test_Expect100Continue_Respond100Continue("data1".getBytes(StandardCharsets.UTF_8));
     }
 
     @Test
     public void test_Expect100Continue_WithMultipleContents_Respond100Continue() throws Exception
     {
-        test_Expect100Continue_Respond100Continue("data1".getBytes("UTF-8"), "data2".getBytes("UTF-8"), "data3".getBytes("UTF-8"));
+        test_Expect100Continue_Respond100Continue("data1".getBytes(StandardCharsets.UTF_8), "data2".getBytes(StandardCharsets.UTF_8), "data3".getBytes(StandardCharsets.UTF_8));
     }
 
     private void test_Expect100Continue_Respond100Continue(byte[]... contents) throws Exception

jetty-client/src/test/java/org/eclipse/jetty/client/HttpClientProxyTest.java

@@ -20,6 +20,7 @@ package org.eclipse.jetty.client;
 
 import java.io.IOException;
 import java.net.URI;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 import javax.servlet.ServletException;
@@ -83,7 +84,7 @@ public class HttpClientProxyTest extends AbstractHttpClientServerTest
     {
         final String user = "foo";
         final String password = "bar";
-        final String credentials = B64Code.encode(user + ":" + password, "ISO-8859-1");
+        final String credentials = B64Code.encode(user + ":" + password, StandardCharsets.ISO_8859_1);
         final String serverHost = "server";
         final String realm = "test_realm";
         final int status = HttpStatus.NO_CONTENT_204;

jetty-client/src/test/java/org/eclipse/jetty/client/HttpClientTest.java

@@ -25,6 +25,7 @@ import java.net.URI;
 import java.net.URLEncoder;
 import java.nio.ByteBuffer;
 import java.nio.channels.UnresolvedAddressException;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
@@ -171,10 +172,10 @@ public class HttpClientTest extends AbstractHttpClientServerTest
                 response.setCharacterEncoding("UTF-8");
                 ServletOutputStream output = response.getOutputStream();
                 String paramValue1 = request.getParameter(paramName1);
-                output.write(paramValue1.getBytes("UTF-8"));
+                output.write(paramValue1.getBytes(StandardCharsets.UTF_8));
                 String paramValue2 = request.getParameter(paramName2);
                 Assert.assertEquals("", paramValue2);
-                output.write("empty".getBytes("UTF-8"));
+                output.write("empty".getBytes(StandardCharsets.UTF_8));
                 baseRequest.setHandled(true);
             }
         });
@@ -186,7 +187,7 @@ public class HttpClientTest extends AbstractHttpClientServerTest
 
         Assert.assertNotNull(response);
         Assert.assertEquals(200, response.getStatus());
-        String content = new String(response.getContent(), "UTF-8");
+        String content = new String(response.getContent(), StandardCharsets.UTF_8);
         Assert.assertEquals(value1 + "empty", content);
     }
 
@@ -204,9 +205,9 @@ public class HttpClientTest extends AbstractHttpClientServerTest
                 ServletOutputStream output = response.getOutputStream();
                 String[] paramValues1 = request.getParameterValues(paramName1);
                 for (String paramValue : paramValues1)
-                    output.write(paramValue.getBytes("UTF-8"));
+                    output.write(paramValue.getBytes(StandardCharsets.UTF_8));
                 String paramValue2 = request.getParameter(paramName2);
-                output.write(paramValue2.getBytes("UTF-8"));
+                output.write(paramValue2.getBytes(StandardCharsets.UTF_8));
                 baseRequest.setHandled(true);
             }
         });
@@ -222,7 +223,7 @@ public class HttpClientTest extends AbstractHttpClientServerTest
 
         Assert.assertNotNull(response);
         Assert.assertEquals(200, response.getStatus());
-        String content = new String(response.getContent(), "UTF-8");
+        String content = new String(response.getContent(), StandardCharsets.UTF_8);
         Assert.assertEquals(value11 + value12 + value2, content);
     }
 
@@ -254,7 +255,7 @@ public class HttpClientTest extends AbstractHttpClientServerTest
 
         Assert.assertNotNull(response);
         Assert.assertEquals(200, response.getStatus());
-        Assert.assertEquals(paramValue, new String(response.getContent(), "UTF-8"));
+        Assert.assertEquals(paramValue, new String(response.getContent(), StandardCharsets.UTF_8));
     }
 
     @Test
@@ -286,7 +287,7 @@ public class HttpClientTest extends AbstractHttpClientServerTest
 
         Assert.assertNotNull(response);
         Assert.assertEquals(200, response.getStatus());
-        Assert.assertEquals(paramValue, new String(response.getContent(), "UTF-8"));
+        Assert.assertEquals(paramValue, new String(response.getContent(), StandardCharsets.UTF_8));
     }
 
     @Test

jetty-client/src/test/java/org/eclipse/jetty/client/HttpReceiverTest.java

@@ -22,6 +22,7 @@ import java.io.ByteArrayOutputStream;
 import java.io.EOFException;
 import java.net.URI;
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 import java.util.Collections;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
@@ -126,7 +127,7 @@ public class HttpReceiverTest
         Assert.assertNotNull(headers);
         Assert.assertEquals(1, headers.size());
         Assert.assertEquals(String.valueOf(content.length()), headers.get(HttpHeader.CONTENT_LENGTH));
-        String received = listener.getContentAsString("UTF-8");
+        String received = listener.getContentAsString(StandardCharsets.UTF_8);
         Assert.assertEquals(content, received);
     }
 

jetty-client/src/test/java/org/eclipse/jetty/client/HttpSenderTest.java

@@ -20,6 +20,7 @@ package org.eclipse.jetty.client;
 
 import java.net.URI;
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 import java.util.Locale;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
@@ -191,7 +192,7 @@ public class HttpSenderTest
         HttpConnection connection = new HttpConnection(client, endPoint, destination);
         Request request = client.newRequest(URI.create("http://localhost/"));
         String content = "abcdef";
-        request.content(new ByteBufferContentProvider(ByteBuffer.wrap(content.getBytes("UTF-8"))));
+        request.content(new ByteBufferContentProvider(ByteBuffer.wrap(content.getBytes(StandardCharsets.UTF_8))));
         final CountDownLatch headersLatch = new CountDownLatch(1);
         final CountDownLatch successLatch = new CountDownLatch(1);
         request.listener(new Request.Listener.Empty()
@@ -226,7 +227,7 @@ public class HttpSenderTest
         Request request = client.newRequest(URI.create("http://localhost/"));
         String content1 = "0123456789";
         String content2 = "abcdef";
-        request.content(new ByteBufferContentProvider(ByteBuffer.wrap(content1.getBytes("UTF-8")), ByteBuffer.wrap(content2.getBytes("UTF-8"))));
+        request.content(new ByteBufferContentProvider(ByteBuffer.wrap(content1.getBytes(StandardCharsets.UTF_8)), ByteBuffer.wrap(content2.getBytes(StandardCharsets.UTF_8))));
         final CountDownLatch headersLatch = new CountDownLatch(1);
         final CountDownLatch successLatch = new CountDownLatch(1);
         request.listener(new Request.Listener.Empty()
@@ -261,7 +262,7 @@ public class HttpSenderTest
         Request request = client.newRequest(URI.create("http://localhost/"));
         String content1 = "0123456789";
         String content2 = "ABCDEF";
-        request.content(new ByteBufferContentProvider(ByteBuffer.wrap(content1.getBytes("UTF-8")), ByteBuffer.wrap(content2.getBytes("UTF-8")))
+        request.content(new ByteBufferContentProvider(ByteBuffer.wrap(content1.getBytes(StandardCharsets.UTF_8)), ByteBuffer.wrap(content2.getBytes(StandardCharsets.UTF_8)))
         {
             @Override
             public long getLength()

jetty-client/src/test/java/org/eclipse/jetty/client/api/Usage.java

@@ -24,6 +24,7 @@ import java.io.OutputStream;
 import java.net.HttpCookie;
 import java.net.URI;
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Paths;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
@@ -269,7 +270,7 @@ public class Usage
         HttpClient client = new HttpClient();
         client.start();
 
-        InputStream input = new ByteArrayInputStream("content".getBytes("UTF-8"));
+        InputStream input = new ByteArrayInputStream("content".getBytes(StandardCharsets.UTF_8));
 
         ContentResponse response = client.newRequest("localhost", 8080)
                 // Provide the content as InputStream

jetty-client/src/test/java/org/eclipse/jetty/client/ssl/SslBytesClientTest.java

@@ -24,6 +24,7 @@ import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.net.SocketTimeoutException;
+import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutorService;
@@ -151,7 +152,7 @@ public class SslBytesClientTest extends SslBytesTest
 
         SimpleProxy.AutomaticFlow automaticProxyFlow = proxy.startAutomaticFlow();
         // Read request
-        BufferedReader reader = new BufferedReader(new InputStreamReader(server.getInputStream(), "UTF-8"));
+        BufferedReader reader = new BufferedReader(new InputStreamReader(server.getInputStream(), StandardCharsets.UTF_8));
         String line = reader.readLine();
         Assert.assertTrue(line.startsWith("GET"));
         while (line.length() > 0)
@@ -161,7 +162,7 @@ public class SslBytesClientTest extends SslBytesTest
         OutputStream output = server.getOutputStream();
         output.write(("HTTP/1.1 200 OK\r\n" +
                 "Content-Length: 0\r\n" +
-                "\r\n").getBytes("UTF-8"));
+                "\r\n").getBytes(StandardCharsets.UTF_8));
         output.flush();
         Assert.assertTrue(automaticProxyFlow.stop(5, TimeUnit.SECONDS));
 
@@ -197,7 +198,7 @@ public class SslBytesClientTest extends SslBytesTest
 
         // Read request
         InputStream serverInput = server.getInputStream();
-        BufferedReader reader = new BufferedReader(new InputStreamReader(serverInput, "UTF-8"));
+        BufferedReader reader = new BufferedReader(new InputStreamReader(serverInput, StandardCharsets.UTF_8));
         String line = reader.readLine();
         Assert.assertTrue(line.startsWith("GET"));
         while (line.length() > 0)
@@ -206,16 +207,16 @@ public class SslBytesClientTest extends SslBytesTest
         OutputStream serverOutput = server.getOutputStream();
         byte[] data1 = new byte[1024];
         Arrays.fill(data1, (byte)'X');
-        String content1 = new String(data1, "UTF-8");
+        String content1 = new String(data1, StandardCharsets.UTF_8);
         byte[] data2 = new byte[1024];
         Arrays.fill(data2, (byte)'Y');
-        final String content2 = new String(data2, "UTF-8");
+        final String content2 = new String(data2, StandardCharsets.UTF_8);
         // Write first part of the response
         serverOutput.write(("HTTP/1.1 200 OK\r\n" +
                 "Content-Type: text/plain\r\n" +
                 "Content-Length: " + (content1.length() + content2.length()) + "\r\n" +
                 "\r\n" +
-                content1).getBytes("UTF-8"));
+                content1).getBytes(StandardCharsets.UTF_8));
         serverOutput.flush();
         Assert.assertTrue(automaticProxyFlow.stop(5, TimeUnit.SECONDS));
 
@@ -319,7 +320,7 @@ public class SslBytesClientTest extends SslBytesTest
 
         // Read request
         InputStream serverInput = server.getInputStream();
-        BufferedReader reader = new BufferedReader(new InputStreamReader(serverInput, "UTF-8"));
+        BufferedReader reader = new BufferedReader(new InputStreamReader(serverInput, StandardCharsets.UTF_8));
         String line = reader.readLine();
         Assert.assertTrue(line.startsWith("GET"));
         while (line.length() > 0)
@@ -328,16 +329,16 @@ public class SslBytesClientTest extends SslBytesTest
         OutputStream serverOutput = server.getOutputStream();
         byte[] data1 = new byte[1024];
         Arrays.fill(data1, (byte)'X');
-        String content1 = new String(data1, "UTF-8");
+        String content1 = new String(data1, StandardCharsets.UTF_8);
         byte[] data2 = new byte[1024];
         Arrays.fill(data2, (byte)'Y');
-        final String content2 = new String(data2, "UTF-8");
+        final String content2 = new String(data2, StandardCharsets.UTF_8);
         // Write first part of the response
         serverOutput.write(("HTTP/1.1 200 OK\r\n" +
                 "Content-Type: text/plain\r\n" +
                 "Content-Length: " + (content1.length() + content2.length()) + "\r\n" +
                 "\r\n" +
-                content1).getBytes("UTF-8"));
+                content1).getBytes(StandardCharsets.UTF_8));
         serverOutput.flush();
         Assert.assertTrue(automaticProxyFlow.stop(5, TimeUnit.SECONDS));
 

jetty-client/src/test/java/org/eclipse/jetty/client/ssl/SslBytesServerTest.java

@@ -28,6 +28,7 @@ import java.net.SocketTimeoutException;
 import java.nio.ByteBuffer;
 import java.nio.channels.SelectionKey;
 import java.nio.channels.SocketChannel;
+import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.concurrent.Callable;
 import java.util.concurrent.CountDownLatch;
@@ -575,7 +576,7 @@ public class SslBytesServerTest extends SslBytesTest
                 clientOutput.write(("" +
                         "GET / HTTP/1.1\r\n" +
                         "Host: localhost\r\n" +
-                        "\r\n").getBytes("UTF-8"));
+                        "\r\n").getBytes(StandardCharsets.UTF_8));
                 clientOutput.flush();
                 return null;
             }
@@ -617,7 +618,7 @@ public class SslBytesServerTest extends SslBytesTest
                 clientOutput.write(("" +
                         "GET / HTTP/1.1\r\n" +
                         "Host: localhost\r\n" +
-                        "\r\n").getBytes("UTF-8"));
+                        "\r\n").getBytes(StandardCharsets.UTF_8));
                 clientOutput.flush();
                 return null;
             }
@@ -633,7 +634,7 @@ public class SslBytesServerTest extends SslBytesTest
         Assert.assertEquals(TLSRecord.Type.APPLICATION, record.getType());
         proxy.flushToClient(record);
 
-        BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), "UTF-8"));
+        BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), StandardCharsets.UTF_8));
         String line = reader.readLine();
         Assert.assertNotNull(line);
         Assert.assertTrue(line.startsWith("HTTP/1.1 200 "));
@@ -710,7 +711,7 @@ public class SslBytesServerTest extends SslBytesTest
                 clientOutput.write(("" +
                         "GET / HTTP/1.1\r\n" +
                         "Host: localhost\r\n" +
-                        "\r\n").getBytes("UTF-8"));
+                        "\r\n").getBytes(StandardCharsets.UTF_8));
                 clientOutput.flush();
                 return null;
             }
@@ -727,7 +728,7 @@ public class SslBytesServerTest extends SslBytesTest
         Assert.assertEquals(TLSRecord.Type.APPLICATION, record.getType());
         proxy.flushToClient(record);
 
-        BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), "UTF-8"));
+        BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), StandardCharsets.UTF_8));
         String line = reader.readLine();
         Assert.assertNotNull(line);
         Assert.assertTrue(line.startsWith("HTTP/1.1 200 "));
@@ -782,7 +783,7 @@ public class SslBytesServerTest extends SslBytesTest
                 clientOutput.write(("" +
                         "GET / HTTP/1.1\r\n" +
                         "Host: localhost\r\n" +
-                        "\r\n").getBytes("UTF-8"));
+                        "\r\n").getBytes(StandardCharsets.UTF_8));
                 clientOutput.flush();
                 return null;
             }
@@ -850,7 +851,7 @@ public class SslBytesServerTest extends SslBytesTest
                 clientOutput.write(("" +
                         "GET / HTTP/1.1\r\n" +
                         "Host: localhost\r\n" +
-                        "\r\n").getBytes("UTF-8"));
+                        "\r\n").getBytes(StandardCharsets.UTF_8));
                 clientOutput.flush();
                 return null;
             }
@@ -913,7 +914,7 @@ public class SslBytesServerTest extends SslBytesTest
                 clientOutput.write(("" +
                         "GET / HTTP/1.1\r\n" +
                         "Host: localhost\r\n" +
-                        "\r\n").getBytes("UTF-8"));
+                        "\r\n").getBytes(StandardCharsets.UTF_8));
                 clientOutput.flush();
                 return null;
             }
@@ -964,7 +965,7 @@ public class SslBytesServerTest extends SslBytesTest
                 clientOutput.write(("" +
                         "GET / HTTP/1.1\r\n" +
                         "Host: localhost\r\n" +
-                        "\r\n").getBytes("UTF-8"));
+                        "\r\n").getBytes(StandardCharsets.UTF_8));
                 clientOutput.flush();
                 return null;
             }
@@ -1007,7 +1008,7 @@ public class SslBytesServerTest extends SslBytesTest
 
         byte[] data = new byte[128 * 1024];
         Arrays.fill(data, (byte)'X');
-        final String content = new String(data, "UTF-8");
+        final String content = new String(data, StandardCharsets.UTF_8);
         Future<Object> request = threadPool.submit(new Callable<Object>()
         {
             @Override
@@ -1019,7 +1020,7 @@ public class SslBytesServerTest extends SslBytesTest
                         "Host: localhost\r\n" +
                         "Content-Length: " + content.length() + "\r\n" +
                         "\r\n" +
-                        content).getBytes("UTF-8"));
+                        content).getBytes(StandardCharsets.UTF_8));
                 clientOutput.flush();
                 return null;
             }
@@ -1065,7 +1066,7 @@ public class SslBytesServerTest extends SslBytesTest
 
         byte[] data = new byte[128 * 1024];
         Arrays.fill(data, (byte)'X');
-        final String content = new String(data, "UTF-8");
+        final String content = new String(data, StandardCharsets.UTF_8);
         Future<Object> request = threadPool.submit(new Callable<Object>()
         {
             @Override
@@ -1077,7 +1078,7 @@ public class SslBytesServerTest extends SslBytesTest
                         "Host: localhost\r\n" +
                         "Content-Length: " + content.length() + "\r\n" +
                         "\r\n" +
-                        content).getBytes("UTF-8"));
+                        content).getBytes(StandardCharsets.UTF_8));
                 clientOutput.flush();
                 return null;
             }
@@ -1139,7 +1140,7 @@ public class SslBytesServerTest extends SslBytesTest
                 clientOutput.write(("" +
                         "GET / HTTP/1.1\r\n" +
                         "Host: localhost\r\n" +
-                        "\r\n").getBytes("UTF-8"));
+                        "\r\n").getBytes(StandardCharsets.UTF_8));
                 clientOutput.flush();
                 return null;
             }
@@ -1211,7 +1212,7 @@ public class SslBytesServerTest extends SslBytesTest
                         "Content-Type: text/plain\r\n" +
                         "Content-Length: " + content.length() + "\r\n" +
                         "\r\n" +
-                        content).getBytes("UTF-8"));
+                        content).getBytes(StandardCharsets.UTF_8));
                 clientOutput.flush();
                 return null;
             }
@@ -1232,7 +1233,7 @@ public class SslBytesServerTest extends SslBytesTest
         Assert.assertEquals(TLSRecord.Type.APPLICATION, record.getType());
         proxy.flushToClient(record);
 
-        BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), "UTF-8"));
+        BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), StandardCharsets.UTF_8));
         String line = reader.readLine();
         Assert.assertNotNull(line);
         Assert.assertTrue(line.startsWith("HTTP/1.1 200 "));
@@ -1263,7 +1264,7 @@ public class SslBytesServerTest extends SslBytesTest
         // Use a content that is larger than the TLS record which is 2^14 (around 16k)
         byte[] data = new byte[128 * 1024];
         Arrays.fill(data, (byte)'X');
-        final String content = new String(data, "UTF-8");
+        final String content = new String(data, StandardCharsets.UTF_8);
 
         Future<Object> request = threadPool.submit(new Callable<Object>()
         {
@@ -1277,7 +1278,7 @@ public class SslBytesServerTest extends SslBytesTest
                         "Content-Type: text/plain\r\n" +
                         "Content-Length: " + content.length() + "\r\n" +
                         "\r\n" +
-                        content).getBytes("UTF-8"));
+                        content).getBytes(StandardCharsets.UTF_8));
                 clientOutput.flush();
                 return null;
             }
@@ -1309,7 +1310,7 @@ public class SslBytesServerTest extends SslBytesTest
         Assert.assertEquals(TLSRecord.Type.APPLICATION, record.getType());
         proxy.flushToClient(record);
 
-        BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), "UTF-8"));
+        BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), StandardCharsets.UTF_8));
         String line = reader.readLine();
         Assert.assertNotNull(line);
         Assert.assertTrue(line.startsWith("HTTP/1.1 200 "));
@@ -1344,10 +1345,10 @@ public class SslBytesServerTest extends SslBytesTest
 
         byte[] data1 = new byte[1024];
         Arrays.fill(data1, (byte)'X');
-        String content1 = new String(data1, "UTF-8");
+        String content1 = new String(data1, StandardCharsets.UTF_8);
         byte[] data2 = new byte[1024];
         Arrays.fill(data2, (byte)'Y');
-        final String content2 = new String(data2, "UTF-8");
+        final String content2 = new String(data2, StandardCharsets.UTF_8);
 
         // Write only part of the body
         automaticProxyFlow = proxy.startAutomaticFlow();
@@ -1357,7 +1358,7 @@ public class SslBytesServerTest extends SslBytesTest
                 "Content-Type: text/plain\r\n" +
                 "Content-Length: " + (content1.length() + content2.length()) + "\r\n" +
                 "\r\n" +
-                content1).getBytes("UTF-8"));
+                content1).getBytes(StandardCharsets.UTF_8));
         clientOutput.flush();
         Assert.assertTrue(automaticProxyFlow.stop(5, TimeUnit.SECONDS));
 
@@ -1391,7 +1392,7 @@ public class SslBytesServerTest extends SslBytesTest
             @Override
             public Object call() throws Exception
             {
-                clientOutput.write(content2.getBytes("UTF-8"));
+                clientOutput.write(content2.getBytes(StandardCharsets.UTF_8));
                 clientOutput.flush();
                 return null;
             }
@@ -1435,10 +1436,10 @@ public class SslBytesServerTest extends SslBytesTest
         // Use a content that is larger than the TLS record which is 2^14 (around 16k)
         byte[] data1 = new byte[80 * 1024];
         Arrays.fill(data1, (byte)'X');
-        String content1 = new String(data1, "UTF-8");
+        String content1 = new String(data1, StandardCharsets.UTF_8);
         byte[] data2 = new byte[48 * 1024];
         Arrays.fill(data2, (byte)'Y');
-        final String content2 = new String(data2, "UTF-8");
+        final String content2 = new String(data2, StandardCharsets.UTF_8);
 
         // Write only part of the body
         automaticProxyFlow = proxy.startAutomaticFlow();
@@ -1448,7 +1449,7 @@ public class SslBytesServerTest extends SslBytesTest
                 "Content-Type: text/plain\r\n" +
                 "Content-Length: " + (content1.length() + content2.length()) + "\r\n" +
                 "\r\n" +
-                content1).getBytes("UTF-8"));
+                content1).getBytes(StandardCharsets.UTF_8));
         clientOutput.flush();
         Assert.assertTrue(automaticProxyFlow.stop(5, TimeUnit.SECONDS));
 
@@ -1513,7 +1514,7 @@ public class SslBytesServerTest extends SslBytesTest
             @Override
             public Object call() throws Exception
             {
-                clientOutput.write(content2.getBytes("UTF-8"));
+                clientOutput.write(content2.getBytes(StandardCharsets.UTF_8));
                 clientOutput.flush();
                 return null;
             }
@@ -1535,7 +1536,7 @@ public class SslBytesServerTest extends SslBytesTest
         Assert.assertEquals(TLSRecord.Type.APPLICATION, record.getType());
         proxy.flushToClient(record);
 
-        BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), "UTF-8"));
+        BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), StandardCharsets.UTF_8));
         String line = reader.readLine();
         Assert.assertNotNull(line);
         Assert.assertTrue(line.startsWith("HTTP/1.1 200 "));
@@ -1569,10 +1570,10 @@ public class SslBytesServerTest extends SslBytesTest
         // Use a content that is larger than the TLS record which is 2^14 (around 16k)
         byte[] data1 = new byte[80 * 1024];
         Arrays.fill(data1, (byte)'X');
-        String content1 = new String(data1, "UTF-8");
+        String content1 = new String(data1, StandardCharsets.UTF_8);
         byte[] data2 = new byte[48 * 1024];
         Arrays.fill(data2, (byte)'Y');
-        final String content2 = new String(data2, "UTF-8");
+        final String content2 = new String(data2, StandardCharsets.UTF_8);
 
         // Write only part of the body
         automaticProxyFlow = proxy.startAutomaticFlow();
@@ -1582,7 +1583,7 @@ public class SslBytesServerTest extends SslBytesTest
                 "Content-Type: text/plain\r\n" +
                 "Content-Length: " + (content1.length() + content2.length()) + "\r\n" +
                 "\r\n" +
-                content1).getBytes("UTF-8"));
+                content1).getBytes(StandardCharsets.UTF_8));
         clientOutput.flush();
         Assert.assertTrue(automaticProxyFlow.stop(5, TimeUnit.SECONDS));
 
@@ -1665,7 +1666,7 @@ public class SslBytesServerTest extends SslBytesTest
             @Override
             public Object call() throws Exception
             {
-                clientOutput.write(content2.getBytes("UTF-8"));
+                clientOutput.write(content2.getBytes(StandardCharsets.UTF_8));
                 clientOutput.flush();
                 return null;
             }
@@ -1697,7 +1698,7 @@ public class SslBytesServerTest extends SslBytesTest
         Assert.assertEquals(TLSRecord.Type.APPLICATION, record.getType());
         proxy.flushToClient(record);
 
-        BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), "UTF-8"));
+        BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), StandardCharsets.UTF_8));
         String line = reader.readLine();
         Assert.assertNotNull(line);
         Assert.assertTrue(line.startsWith("HTTP/1.1 200 "));
@@ -1728,7 +1729,7 @@ public class SslBytesServerTest extends SslBytesTest
 
         byte[] data = new byte[3 * 1024];
         Arrays.fill(data, (byte)'Y');
-        String content = new String(data, "UTF-8");
+        String content = new String(data, StandardCharsets.UTF_8);
         automaticProxyFlow = proxy.startAutomaticFlow();
         clientOutput.write(("" +
                 "POST / HTTP/1.1\r\n" +
@@ -1737,10 +1738,10 @@ public class SslBytesServerTest extends SslBytesTest
                 "Content-Length: " + content.length() + "\r\n" +
                 "Connection: close\r\n" +
                 "\r\n" +
-                content).getBytes("UTF-8"));
+                content).getBytes(StandardCharsets.UTF_8));
         clientOutput.flush();
 
-        BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), "UTF-8"));
+        BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), StandardCharsets.UTF_8));
         String line = reader.readLine();
         Assert.assertNotNull(line);
         Assert.assertTrue(line.startsWith("HTTP/1.1 200 "));
@@ -1786,7 +1787,7 @@ public class SslBytesServerTest extends SslBytesTest
         });
 
         // Instead of passing the Client Hello, we simulate plain text was passed in
-        proxy.flushToServer(0, "GET / HTTP/1.1\r\n".getBytes("UTF-8"));
+        proxy.flushToServer(0, "GET / HTTP/1.1\r\n".getBytes(StandardCharsets.UTF_8));
 
         // We expect that the server closes the connection immediately
         TLSRecord record = proxy.readFromServer();
@@ -1820,7 +1821,7 @@ public class SslBytesServerTest extends SslBytesTest
                     clientOutput.write(("" +
                             "GET / HTTP/1.1\r\n" +
                             "Host: localhost\r\n" +
-                            "\r\n").getBytes("UTF-8"));
+                            "\r\n").getBytes(StandardCharsets.UTF_8));
                     clientOutput.flush();
                     latch.countDown();
                 }

jetty-http/src/main/java/org/eclipse/jetty/http/HttpField.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.http;
 
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 import java.util.HashSet;
 import java.util.Set;
 
@@ -176,7 +177,7 @@ public class HttpField
     
     private static byte[] toSanitisedName(String s)
     {
-        byte[] bytes = s.getBytes(StringUtil.__ISO_8859_1_CHARSET);
+        byte[] bytes = s.getBytes(StandardCharsets.ISO_8859_1);
         for (int i=bytes.length;i-->0;)
         {
             switch(bytes[i])
@@ -192,7 +193,7 @@ public class HttpField
 
     private static byte[] toSanitisedValue(String s)
     {
-        byte[] bytes = s.getBytes(StringUtil.__ISO_8859_1_CHARSET);
+        byte[] bytes = s.getBytes(StandardCharsets.ISO_8859_1);
         for (int i=bytes.length;i-->0;)
         {
             switch(bytes[i])

jetty-http/src/main/java/org/eclipse/jetty/http/HttpParser.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.http;
 
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 
 import org.eclipse.jetty.http.HttpTokens.EndOfContent;
 import org.eclipse.jetty.util.ArrayTernaryTrie;
@@ -969,12 +970,12 @@ public class HttpParser
                                             // Have to get the fields exactly from the buffer to match case
                                             String fn=field.getName();
                                             String fv=field.getValue();
-                                            n=BufferUtil.toString(buffer,buffer.position()-1,fn.length(),StringUtil.__US_ASCII_CHARSET);
+                                            n=BufferUtil.toString(buffer,buffer.position()-1,fn.length(),StandardCharsets.US_ASCII);
                                             if (fv==null)
                                                 v=null;
                                             else
                                             {
-                                                v=BufferUtil.toString(buffer,buffer.position()+fn.length()+1,fv.length(),StringUtil.__ISO_8859_1_CHARSET);
+                                                v=BufferUtil.toString(buffer,buffer.position()+fn.length()+1,fv.length(),StandardCharsets.ISO_8859_1);
                                                 field=new HttpField(field.getHeader(),n,v);
                                             }
                                         }

jetty-http/src/main/java/org/eclipse/jetty/http/HttpTester.java

@@ -22,6 +22,7 @@ import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.nio.ByteBuffer;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 
 import org.eclipse.jetty.http.HttpGenerator.RequestInfo;
 import org.eclipse.jetty.http.HttpGenerator.ResponseInfo;
@@ -346,7 +347,7 @@ public class HttpTester
 
             String content_type=get(HttpHeader.CONTENT_TYPE);
             String encoding=MimeTypes.getCharsetFromContentType(content_type);
-            Charset charset=encoding==null?StringUtil.__UTF8_CHARSET:Charset.forName(encoding);
+            Charset charset=encoding==null?StandardCharsets.UTF_8:Charset.forName(encoding);
 
             return new String(bytes,charset);
         }

jetty-http/src/main/java/org/eclipse/jetty/http/HttpURI.java

@@ -21,6 +21,7 @@ package org.eclipse.jetty.http;
 import java.io.UnsupportedEncodingException;
 import java.net.URI;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 
 import org.eclipse.jetty.util.MultiMap;
 import org.eclipse.jetty.util.StringUtil;
@@ -100,15 +101,7 @@ public class HttpURI
     public HttpURI(String raw)
     {
         _rawString=raw;
-        byte[] b;
-        try
-        {
-            b = raw.getBytes(StringUtil.__UTF8);
-        }
-        catch (UnsupportedEncodingException e)
-        {
-           throw new RuntimeException(e.getMessage());
-        }
+        byte[] b = raw.getBytes(StandardCharsets.UTF_8);
         parse(b,0,b.length);
         _charset = URIUtil.__CHARSET;
     }
@@ -617,8 +610,13 @@ public class HttpURI
             return StringUtil.toUTF8String(_raw, _path, _param-_path);
         return utf8b.toString();
     }
-    
+
     public String getDecodedPath(String encoding)
+    {
+        return getDecodedPath(Charset.forName(encoding));
+    }
+
+    public String getDecodedPath(Charset encoding)
     {
         if (_path==_param)
             return null;
@@ -678,9 +676,9 @@ public class HttpURI
 
 
         if (bytes==null)
-            return StringUtil.toString(_raw,_path,_param-_path,encoding);
+            return new String(_raw,_path,_param-_path,encoding);
 
-        return StringUtil.toString(bytes,0,n,encoding);
+        return new String(bytes,0,n,encoding);
     }
 
     public String getPathAndParam()
@@ -734,10 +732,10 @@ public class HttpURI
     {
         if (_query==_fragment)
             return;
-        if (_charset==StringUtil.__UTF8_CHARSET)
+        if (_charset.equals(StandardCharsets.UTF_8))
             UrlEncoded.decodeUtf8To(_raw,_query+1,_fragment-_query-1,parameters);
         else
-            UrlEncoded.decodeTo(StringUtil.toString(_raw,_query+1,_fragment-_query-1,_charset.toString()),parameters,_charset.toString(),-1);
+            UrlEncoded.decodeTo(new String(_raw,_query+1,_fragment-_query-1,_charset),parameters,_charset,-1);
     }
 
     public void decodeQueryTo(MultiMap<String> parameters, String encoding) throws UnsupportedEncodingException
@@ -751,6 +749,17 @@ public class HttpURI
             UrlEncoded.decodeTo(StringUtil.toString(_raw,_query+1,_fragment-_query-1,encoding),parameters,encoding,-1);
     }
 
+    public void decodeQueryTo(MultiMap<String> parameters, Charset encoding) throws UnsupportedEncodingException
+    {
+        if (_query==_fragment)
+            return;
+
+        if (encoding==null || StandardCharsets.UTF_8.equals(encoding))
+            UrlEncoded.decodeUtf8To(_raw,_query+1,_fragment-_query-1,parameters);
+        else
+            UrlEncoded.decodeTo(new String(_raw,_query+1,_fragment-_query-1,encoding),parameters,encoding,-1);
+    }
+
     public void clear()
     {
         _scheme=_authority=_host=_port=_path=_param=_query=_fragment=_end=0;

jetty-http/src/test/java/org/eclipse/jetty/http/HttpParserTest.java

@@ -24,6 +24,7 @@ import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
 
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -112,7 +113,7 @@ public class HttpParserTest
     @Test
     public void testLineParse3() throws Exception
     {
-        ByteBuffer buffer= BufferUtil.toBuffer("POST /fo\u0690 HTTP/1.0\015\012" + "\015\012",StringUtil.__UTF8_CHARSET);
+        ByteBuffer buffer= BufferUtil.toBuffer("POST /fo\u0690 HTTP/1.0\015\012" + "\015\012",StandardCharsets.UTF_8);
 
         HttpParser.RequestHandler<ByteBuffer> handler  = new Handler();
         HttpParser parser= new HttpParser(handler);
@@ -126,7 +127,7 @@ public class HttpParserTest
     @Test
     public void testLineParse4() throws Exception
     {
-        ByteBuffer buffer= BufferUtil.toBuffer("POST /foo?param=\u0690 HTTP/1.0\015\012" + "\015\012",StringUtil.__UTF8_CHARSET);
+        ByteBuffer buffer= BufferUtil.toBuffer("POST /foo?param=\u0690 HTTP/1.0\015\012" + "\015\012",StandardCharsets.UTF_8);
 
         HttpParser.RequestHandler<ByteBuffer> handler  = new Handler();
         HttpParser parser= new HttpParser(handler);
@@ -321,10 +322,10 @@ public class HttpParserTest
         ByteBuffer buffer=BufferUtil.allocate(4096);
         BufferUtil.flipToFill(buffer); 
         BufferUtil.put(BufferUtil.toBuffer("GET "),buffer);
-        buffer.put("/foo/\u0690/".getBytes(StringUtil.__UTF8_CHARSET));
+        buffer.put("/foo/\u0690/".getBytes(StandardCharsets.UTF_8));
         BufferUtil.put(BufferUtil.toBuffer(" HTTP/1.0\r\n"),buffer);
         BufferUtil.put(BufferUtil.toBuffer("Header1: "),buffer);
-        buffer.put("\u00e6 \u00e6".getBytes(StringUtil.__ISO_8859_1_CHARSET));
+        buffer.put("\u00e6 \u00e6".getBytes(StandardCharsets.ISO_8859_1));
         BufferUtil.put(BufferUtil.toBuffer("  \r\n\r\n"),buffer);
         BufferUtil.flipToFlush(buffer,0);
                     
@@ -1165,7 +1166,7 @@ public class HttpParserTest
         {
             if (_content==null)
                 _content="";
-            String c = BufferUtil.toString(ref,StringUtil.__UTF8_CHARSET);
+            String c = BufferUtil.toString(ref,StandardCharsets.UTF_8);
             //System.err.println("content '"+c+"'");
             _content= _content + c;
             ref.position(ref.limit());

jetty-io/src/main/java/org/eclipse/jetty/io/ByteArrayEndPoint.java

@@ -23,6 +23,7 @@ import java.net.InetSocketAddress;
 import java.nio.ByteBuffer;
 import java.nio.channels.ClosedChannelException;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 
 import org.eclipse.jetty.util.BufferUtil;
 import org.eclipse.jetty.util.StringUtil;
@@ -153,7 +154,7 @@ public class ByteArrayEndPoint extends AbstractEndPoint
     /* ------------------------------------------------------------ */
     public void setInput(String s)
     {
-        setInput(BufferUtil.toBuffer(s,StringUtil.__UTF8_CHARSET));
+        setInput(BufferUtil.toBuffer(s,StandardCharsets.UTF_8));
     }
 
     /* ------------------------------------------------------------ */
@@ -177,7 +178,7 @@ public class ByteArrayEndPoint extends AbstractEndPoint
      */
     public String getOutputString()
     {
-        return getOutputString(StringUtil.__UTF8_CHARSET);
+        return getOutputString(StandardCharsets.UTF_8);
     }
 
     /* ------------------------------------------------------------ */
@@ -207,7 +208,7 @@ public class ByteArrayEndPoint extends AbstractEndPoint
      */
     public String takeOutputString()
     {
-        return takeOutputString(StringUtil.__UTF8_CHARSET);
+        return takeOutputString(StandardCharsets.UTF_8);
     }
 
     /* ------------------------------------------------------------ */

jetty-io/src/main/java/org/eclipse/jetty/io/WriterOutputStream.java

@@ -21,6 +21,7 @@ package org.eclipse.jetty.io;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.io.Writer;
+import java.nio.charset.Charset;
 
 
 /* ------------------------------------------------------------ */
@@ -33,14 +34,14 @@ import java.io.Writer;
 public class WriterOutputStream extends OutputStream
 {
     protected final Writer _writer;
-    protected final String _encoding;
+    protected final Charset _encoding;
     private final byte[] _buf=new byte[1];
     
     /* ------------------------------------------------------------ */
     public WriterOutputStream(Writer writer, String encoding)
     {
         _writer=writer;
-        _encoding=encoding;
+        _encoding=encoding==null?null:Charset.forName(encoding);
     }
     
     /* ------------------------------------------------------------ */

jetty-io/src/test/java/org/eclipse/jetty/io/IOTest.java

@@ -36,6 +36,7 @@ import java.nio.channels.AsynchronousServerSocketChannel;
 import java.nio.channels.AsynchronousSocketChannel;
 import java.nio.channels.ServerSocketChannel;
 import java.nio.channels.SocketChannel;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.Future;
 import java.util.concurrent.TimeUnit;
@@ -444,7 +445,7 @@ public class IOTest
         ByteBuffer read = ByteBuffer.allocate(1024);
         Future<Integer> reading = server.read(read);
 
-        byte[] data = "Testing 1 2 3".getBytes("UTF-8");
+        byte[] data = "Testing 1 2 3".getBytes(StandardCharsets.UTF_8);
         ByteBuffer write = BufferUtil.toBuffer(data);
         Future<Integer> writing = client.write(write);
 

jetty-io/src/test/java/org/eclipse/jetty/io/SelectChannelEndPointSslTest.java

@@ -23,6 +23,7 @@ import java.io.IOException;
 import java.net.Socket;
 import java.nio.ByteBuffer;
 import java.nio.channels.SocketChannel;
+import java.nio.charset.StandardCharsets;
 import javax.net.ssl.SSLEngine;
 import javax.net.ssl.SSLEngineResult;
 import javax.net.ssl.SSLEngineResult.HandshakeStatus;
@@ -170,7 +171,7 @@ public class SelectChannelEndPointSslTest extends SelectChannelEndPointTest
         if (debug) System.err.println("\nSay Hello");
 
         // write a message
-        appOut.put("HelloWorld".getBytes("UTF-8"));
+        appOut.put("HelloWorld".getBytes(StandardCharsets.UTF_8));
         appOut.flip();
         SSLEngineResult result =engine.wrap(appOut,sslOut);
         if (debug) System.err.println(result);

jetty-io/src/test/java/org/eclipse/jetty/io/SelectChannelEndPointTest.java

@@ -29,6 +29,7 @@ import java.nio.ByteBuffer;
 import java.nio.channels.SelectionKey;
 import java.nio.channels.ServerSocketChannel;
 import java.nio.channels.SocketChannel;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
@@ -228,7 +229,7 @@ public class SelectChannelEndPointTest
         _manager.accept(server);
 
         // Write client to server
-        client.getOutputStream().write("HelloWorld".getBytes("UTF-8"));
+        client.getOutputStream().write("HelloWorld".getBytes(StandardCharsets.UTF_8));
 
         // Verify echo server to client
         for (char c : "HelloWorld".toCharArray())
@@ -253,7 +254,7 @@ public class SelectChannelEndPointTest
         }
 
         // write then shutdown
-        client.getOutputStream().write("Goodbye Cruel TLS".getBytes("UTF-8"));
+        client.getOutputStream().write("Goodbye Cruel TLS".getBytes(StandardCharsets.UTF_8));
 
         // Verify echo server to client
         for (char c : "Goodbye Cruel TLS".toCharArray())
@@ -287,7 +288,7 @@ public class SelectChannelEndPointTest
         _manager.accept(server);
 
         // Write client to server
-        client.getOutputStream().write("HelloWorld".getBytes("UTF-8"));
+        client.getOutputStream().write("HelloWorld".getBytes(StandardCharsets.UTF_8));
 
         // Verify echo server to client
         for (char c : "HelloWorld".toCharArray())
@@ -310,7 +311,7 @@ public class SelectChannelEndPointTest
         }
 
         // write then shutdown
-        client.getOutputStream().write("Goodbye Cruel TLS".getBytes("UTF-8"));
+        client.getOutputStream().write("Goodbye Cruel TLS".getBytes(StandardCharsets.UTF_8));
         client.shutdownOutput();
 
         // Verify echo server to client
@@ -343,7 +344,7 @@ public class SelectChannelEndPointTest
 
         // Write 8 and cause block waiting for 10
         _blockAt = 10;
-        clientOutputStream.write("12345678".getBytes("UTF-8"));
+        clientOutputStream.write("12345678".getBytes(StandardCharsets.UTF_8));
         clientOutputStream.flush();
 
         Assert.assertTrue(_lastEndPointLatch.await(1, TimeUnit.SECONDS));
@@ -363,7 +364,7 @@ public class SelectChannelEndPointTest
         }
 
         // write remaining characters
-        clientOutputStream.write("90ABCDEF".getBytes("UTF-8"));
+        clientOutputStream.write("90ABCDEF".getBytes(StandardCharsets.UTF_8));
         clientOutputStream.flush();
 
         // Verify echo server to client
@@ -388,7 +389,7 @@ public class SelectChannelEndPointTest
         _manager.accept(server);
 
         // Write client to server
-        client.getOutputStream().write("HelloWorld".getBytes("UTF-8"));
+        client.getOutputStream().write("HelloWorld".getBytes(StandardCharsets.UTF_8));
 
         // Verify echo server to client
         for (char c : "HelloWorld".toCharArray())
@@ -436,7 +437,7 @@ public class SelectChannelEndPointTest
         _manager.accept(server);
 
         // Write client to server
-        clientOutputStream.write("HelloWorld".getBytes("UTF-8"));
+        clientOutputStream.write("HelloWorld".getBytes(StandardCharsets.UTF_8));
 
         // Verify echo server to client
         for (char c : "HelloWorld".toCharArray())
@@ -452,7 +453,7 @@ public class SelectChannelEndPointTest
 
         // Write 8 and cause block waiting for 10
         _blockAt = 10;
-        clientOutputStream.write("12345678".getBytes("UTF-8"));
+        clientOutputStream.write("12345678".getBytes(StandardCharsets.UTF_8));
         clientOutputStream.flush();
 
         // read until idle shutdown received
@@ -493,8 +494,8 @@ public class SelectChannelEndPointTest
         _manager.accept(server);
         final int writes = 200000;
 
-        final byte[] bytes = "HelloWorld-".getBytes(StringUtil.__UTF8_CHARSET);
-        byte[] count = "0\n".getBytes(StringUtil.__UTF8_CHARSET);
+        final byte[] bytes = "HelloWorld-".getBytes(StandardCharsets.UTF_8);
+        byte[] count = "0\n".getBytes(StandardCharsets.UTF_8);
         BufferedOutputStream out = new BufferedOutputStream(client.getOutputStream());
         final CountDownLatch latch = new CountDownLatch(writes);
         final InputStream in = new BufferedInputStream(client.getInputStream());
@@ -561,7 +562,7 @@ public class SelectChannelEndPointTest
         for (int i = 1; i < writes; i++)
         {
             out.write(bytes);
-            out.write(Integer.toString(i).getBytes(StringUtil.__ISO_8859_1_CHARSET));
+            out.write(Integer.toString(i).getBytes(StandardCharsets.ISO_8859_1));
             out.write('\n');
             if (i % 1000 == 0)
             {
@@ -599,7 +600,7 @@ public class SelectChannelEndPointTest
         // Write client to server
         _writeCount = 10000;
         String data = "Now is the time for all good men to come to the aid of the party";
-        client.getOutputStream().write(data.getBytes("UTF-8"));
+        client.getOutputStream().write(data.getBytes(StandardCharsets.UTF_8));
         BufferedInputStream in = new BufferedInputStream(client.getInputStream());
 
         int byteNum = 0;

jetty-io/src/test/java/org/eclipse/jetty/io/SslConnectionTest.java

@@ -27,6 +27,7 @@ import java.nio.ByteBuffer;
 import java.nio.channels.SelectionKey;
 import java.nio.channels.ServerSocketChannel;
 import java.nio.channels.SocketChannel;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -234,14 +235,14 @@ public class SslConnectionTest
         server.configureBlocking(false);
         _manager.accept(server);
 
-        client.getOutputStream().write("Hello".getBytes("UTF-8"));
+        client.getOutputStream().write("Hello".getBytes(StandardCharsets.UTF_8));
         byte[] buffer = new byte[1024];
         int len=client.getInputStream().read(buffer);
         Assert.assertEquals(5, len);
-        Assert.assertEquals("Hello",new String(buffer,0,len,StringUtil.__UTF8_CHARSET));
+        Assert.assertEquals("Hello",new String(buffer,0,len,StandardCharsets.UTF_8));
 
         _dispatches.set(0);
-        client.getOutputStream().write("World".getBytes("UTF-8"));
+        client.getOutputStream().write("World".getBytes(StandardCharsets.UTF_8));
         len=5;
         while(len>0)
             len-=client.getInputStream().read(buffer);
@@ -266,7 +267,7 @@ public class SslConnectionTest
 
         byte[] buffer = new byte[1024];
         int len=client.getInputStream().read(buffer);
-        Assert.assertEquals("Hello Client",new String(buffer,0,len,StringUtil.__UTF8_CHARSET));
+        Assert.assertEquals("Hello Client",new String(buffer,0,len,StandardCharsets.UTF_8));
         Assert.assertEquals(null,_writeCallback.get(100,TimeUnit.MILLISECONDS));
         client.close();
     }
@@ -292,7 +293,7 @@ public class SslConnectionTest
             {
                 try
                 {
-                    BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream(),StringUtil.__UTF8_CHARSET));
+                    BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream(),StandardCharsets.UTF_8));
                     while(count.getCount()>0)
                     {
                         String line=in.readLine();
@@ -311,7 +312,7 @@ public class SslConnectionTest
 
         for (int i=0;i<LINES;i++)
         {
-            client.getOutputStream().write(("HelloWorld "+i+"\n").getBytes("UTF-8"));
+            client.getOutputStream().write(("HelloWorld "+i+"\n").getBytes(StandardCharsets.UTF_8));
             // System.err.println("wrote");
             if (i%1000==0)
             {

jetty-jaspi/src/main/java/org/eclipse/jetty/security/jaspi/modules/BaseAuthModule.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.security.jaspi.modules;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.util.Map;
 import java.util.Set;
 
@@ -119,7 +120,7 @@ public class BaseAuthModule implements ServerAuthModule, ServerAuthContext
     throws IOException, UnsupportedCallbackException
     {
         credentials = credentials.substring(credentials.indexOf(' ')+1);
-        credentials = B64Code.decode(credentials,StringUtil.__ISO_8859_1);
+        credentials = B64Code.decode(credentials, StandardCharsets.ISO_8859_1);
         int i = credentials.indexOf(':');
         String userName = credentials.substring(0,i);
         String password = credentials.substring(i+1);

jetty-jaspi/src/main/java/org/eclipse/jetty/security/jaspi/modules/DigestAuthModule.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.security.jaspi.modules;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
 import java.util.Map;
 
@@ -306,18 +307,18 @@ public class DigestAuthModule extends BaseAuthModule
                 else
                 {
                     // calc A1 digest
-                    md.update(username.getBytes(StringUtil.__ISO_8859_1));
+                    md.update(username.getBytes(StandardCharsets.ISO_8859_1));
                     md.update((byte) ':');
-                    md.update(realm.getBytes(StringUtil.__ISO_8859_1));
+                    md.update(realm.getBytes(StandardCharsets.ISO_8859_1));
                     md.update((byte) ':');
-                    md.update(password.getBytes(StringUtil.__ISO_8859_1));
+                    md.update(password.getBytes(StandardCharsets.ISO_8859_1));
                     ha1 = md.digest();
                 }
                 // calc A2 digest
                 md.reset();
-                md.update(method.getBytes(StringUtil.__ISO_8859_1));
+                md.update(method.getBytes(StandardCharsets.ISO_8859_1));
                 md.update((byte) ':');
-                md.update(uri.getBytes(StringUtil.__ISO_8859_1));
+                md.update(uri.getBytes(StandardCharsets.ISO_8859_1));
                 byte[] ha2 = md.digest();
 
                 // calc digest
@@ -327,17 +328,17 @@ public class DigestAuthModule extends BaseAuthModule
                 // request-digest = <"> < KD ( H(A1), unq(nonce-value) ":" H(A2)
                 // ) > <">
 
-                md.update(TypeUtil.toString(ha1, 16).getBytes(StringUtil.__ISO_8859_1));
+                md.update(TypeUtil.toString(ha1, 16).getBytes(StandardCharsets.ISO_8859_1));
                 md.update((byte) ':');
-                md.update(nonce.getBytes(StringUtil.__ISO_8859_1));
+                md.update(nonce.getBytes(StandardCharsets.ISO_8859_1));
                 md.update((byte) ':');
-                md.update(nc.getBytes(StringUtil.__ISO_8859_1));
+                md.update(nc.getBytes(StandardCharsets.ISO_8859_1));
                 md.update((byte) ':');
-                md.update(cnonce.getBytes(StringUtil.__ISO_8859_1));
+                md.update(cnonce.getBytes(StandardCharsets.ISO_8859_1));
                 md.update((byte) ':');
-                md.update(qop.getBytes(StringUtil.__ISO_8859_1));
+                md.update(qop.getBytes(StandardCharsets.ISO_8859_1));
                 md.update((byte) ':');
-                md.update(TypeUtil.toString(ha2, 16).getBytes(StringUtil.__ISO_8859_1));
+                md.update(TypeUtil.toString(ha2, 16).getBytes(StandardCharsets.ISO_8859_1));
                 byte[] digest = md.digest();
 
                 // check digest

jetty-proxy/src/test/java/org/eclipse/jetty/proxy/ConnectHandlerSSLTest.java

@@ -25,6 +25,7 @@ import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 
 import javax.net.ssl.SSLContext;
 import javax.net.ssl.SSLSocket;
@@ -78,7 +79,7 @@ public class ConnectHandlerSSLTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 OK from the CONNECT request
@@ -98,7 +99,7 @@ public class ConnectHandlerSSLTest extends AbstractConnectHandlerTest
                         "GET /echo HTTP/1.1\r\n" +
                                 "Host: " + hostPort + "\r\n" +
                                 "\r\n";
-                output.write(request.getBytes("UTF-8"));
+                output.write(request.getBytes(StandardCharsets.UTF_8));
                 output.flush();
 
                 response = readResponse(input);
@@ -121,7 +122,7 @@ public class ConnectHandlerSSLTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 OK from the CONNECT request
@@ -145,7 +146,7 @@ public class ConnectHandlerSSLTest extends AbstractConnectHandlerTest
                             "Content-Length: 5\r\n" +
                             "\r\n" +
                             "HELLO";
-                    output.write(request.getBytes("UTF-8"));
+                    output.write(request.getBytes(StandardCharsets.UTF_8));
                     output.flush();
 
                     response = readResponse(input);

jetty-proxy/src/test/java/org/eclipse/jetty/proxy/ConnectHandlerTest.java

@@ -27,6 +27,7 @@ import java.io.OutputStream;
 import java.net.InetAddress;
 import java.net.Socket;
 import java.net.UnknownHostException;
+import java.nio.charset.StandardCharsets;
 import java.util.Locale;
 import java.util.concurrent.ConcurrentMap;
 
@@ -71,7 +72,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 OK from the CONNECT request
@@ -93,7 +94,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 OK from the CONNECT request
@@ -104,7 +105,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
                     "GET /echo" + " HTTP/1.1\r\n" +
                     "Host: " + hostPort + "\r\n" +
                     "\r\n";
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             response = readResponse(input);
@@ -130,7 +131,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 403 from the CONNECT request
@@ -151,7 +152,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 from the CONNECT request
@@ -162,7 +163,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
                     "GET /echo" + " HTTP/1.1\r\n" +
                     "Host: " + hostPort + "\r\n" +
                     "\r\n";
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             response = readResponse(input);
@@ -188,7 +189,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 403 from the CONNECT request
@@ -209,7 +210,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 from the CONNECT request
@@ -220,7 +221,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
                     "GET /echo" + " HTTP/1.1\r\n" +
                     "Host: 127.0.0.1:" + port + "\r\n" +
                     "\r\n";
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             response = readResponse(input);
@@ -245,7 +246,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
                     return false;
                 }
                 String b64 = proxyAuthorization.substring("Basic ".length());
-                String credentials = B64Code.decode(b64, "UTF-8");
+                String credentials = B64Code.decode(b64, StandardCharsets.UTF_8);
                 return "test:test".equals(credentials);
             }
         };
@@ -265,7 +266,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 407 from the CONNECT request
@@ -289,7 +290,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 from the CONNECT request
@@ -300,7 +301,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
                     "GET /echo" + " HTTP/1.1\r\n" +
                     "Host: " + hostPort + "\r\n" +
                     "\r\n";
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             response = readResponse(input);
@@ -342,7 +343,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 500 OK from the CONNECT request
@@ -368,7 +369,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 OK from the CONNECT request
@@ -379,7 +380,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
                     "GET /echo" + " HTTP/1.1\r\n" +
                     "Host: " + hostPort + "\r\n" +
                     "\r\n";
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             response = readResponse(input);
@@ -404,7 +405,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 OK from the CONNECT request
@@ -431,7 +432,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 OK from the CONNECT request
@@ -444,7 +445,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
                         "GET /echo" + " HTTP/1.1\r\n" +
                         "Host: " + hostPort + "\r\n" +
                         "\r\n";
-                output.write(request.getBytes("UTF-8"));
+                output.write(request.getBytes(StandardCharsets.UTF_8));
                 output.flush();
 
                 response = readResponse(input);
@@ -467,7 +468,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 OK from the CONNECT request
@@ -478,7 +479,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
                     "GET /echo HTTP/1.1\r\n" +
                     "Host: " + hostPort + "\r\n" +
                     "\r\n";
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             response = readResponse(input);
@@ -506,7 +507,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 OK from the CONNECT request
@@ -517,7 +518,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
                     "GET /close HTTP/1.1\r\n" +
                     "Host: " + hostPort + "\r\n" +
                     "\r\n";
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             int read = input.read();
@@ -538,7 +539,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 OK from the CONNECT request
@@ -551,7 +552,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
                     "Content-Length: 5\r\n" +
                     "\r\n" +
                     "HELLO";
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             response = readResponse(input);
@@ -562,7 +563,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
                     "GET /echo" + " HTTP/1.1\r\n" +
                     "Host: " + hostPort + "\r\n" +
                     "\r\n";
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             response = readResponse(input);
@@ -585,7 +586,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 OK from the CONNECT request
@@ -603,7 +604,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
                     "Content-Length: " + body.length() + "\r\n" +
                     "\r\n" +
                     body;
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             response = readResponse(input);
@@ -649,7 +650,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 OK from the CONNECT request
@@ -663,7 +664,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
                     "Content-Length: " + body.length() + "\r\n" +
                     "\r\n" +
                     body;
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             response = readResponse(input);
@@ -688,7 +689,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
             socket.shutdownOutput();
 
@@ -716,7 +717,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             // Expect 200 OK from the CONNECT request
@@ -727,7 +728,7 @@ public class ConnectHandlerTest extends AbstractConnectHandlerTest
                     "GET /echo" + " HTTP/1.1\r\n" +
                     "Host: " + hostPort + "\r\n" +
                     "\r\n";
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
             socket.shutdownOutput();
 

jetty-rewrite/src/test/java/org/eclipse/jetty/rewrite/handler/RewriteRegexRuleTest.java

@@ -21,6 +21,7 @@ package org.eclipse.jetty.rewrite.handler;
 import static org.junit.Assert.assertEquals;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 
 import org.eclipse.jetty.http.HttpURI;
 import org.eclipse.jetty.util.MultiMap;
@@ -87,7 +88,7 @@ public class RewriteRegexRuleTest extends AbstractRuleTestCase
             if (test[5]!=null)
             {
                 MultiMap<String> params=new MultiMap<String>();
-                UrlEncoded.decodeTo(test[5],params,StringUtil.__UTF8_CHARSET,-1);
+                UrlEncoded.decodeTo(test[5],params, StandardCharsets.UTF_8,-1);
                                
                 for (String n:params.keySet())
                     assertEquals(params.getString(n),_request.getParameter(n));

jetty-security/src/main/java/org/eclipse/jetty/security/authentication/BasicAuthenticator.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.security.authentication;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 
 import javax.servlet.ServletRequest;
 import javax.servlet.ServletResponse;
@@ -82,7 +83,7 @@ public class BasicAuthenticator extends LoginAuthenticator
                     if ("basic".equalsIgnoreCase(method))
                     {
                         credentials = credentials.substring(space+1);
-                        credentials = B64Code.decode(credentials,StringUtil.__ISO_8859_1);
+                        credentials = B64Code.decode(credentials, StandardCharsets.ISO_8859_1);
                         int i = credentials.indexOf(':');
                         if (i>0)
                         {

jetty-security/src/main/java/org/eclipse/jetty/security/authentication/DigestAuthenticator.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.security.authentication;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
 import java.security.SecureRandom;
 import java.util.BitSet;
@@ -367,18 +368,18 @@ public class DigestAuthenticator extends LoginAuthenticator
                 else
                 {
                     // calc A1 digest
-                    md.update(username.getBytes(StringUtil.__ISO_8859_1));
+                    md.update(username.getBytes(StandardCharsets.ISO_8859_1));
                     md.update((byte) ':');
-                    md.update(realm.getBytes(StringUtil.__ISO_8859_1));
+                    md.update(realm.getBytes(StandardCharsets.ISO_8859_1));
                     md.update((byte) ':');
-                    md.update(password.getBytes(StringUtil.__ISO_8859_1));
+                    md.update(password.getBytes(StandardCharsets.ISO_8859_1));
                     ha1 = md.digest();
                 }
                 // calc A2 digest
                 md.reset();
-                md.update(method.getBytes(StringUtil.__ISO_8859_1));
+                md.update(method.getBytes(StandardCharsets.ISO_8859_1));
                 md.update((byte) ':');
-                md.update(uri.getBytes(StringUtil.__ISO_8859_1));
+                md.update(uri.getBytes(StandardCharsets.ISO_8859_1));
                 byte[] ha2 = md.digest();
 
                 // calc digest
@@ -388,17 +389,17 @@ public class DigestAuthenticator extends LoginAuthenticator
                 // request-digest = <"> < KD ( H(A1), unq(nonce-value) ":" H(A2)
                 // ) > <">
 
-                md.update(TypeUtil.toString(ha1, 16).getBytes(StringUtil.__ISO_8859_1));
+                md.update(TypeUtil.toString(ha1, 16).getBytes(StandardCharsets.ISO_8859_1));
                 md.update((byte) ':');
-                md.update(nonce.getBytes(StringUtil.__ISO_8859_1));
+                md.update(nonce.getBytes(StandardCharsets.ISO_8859_1));
                 md.update((byte) ':');
-                md.update(nc.getBytes(StringUtil.__ISO_8859_1));
+                md.update(nc.getBytes(StandardCharsets.ISO_8859_1));
                 md.update((byte) ':');
-                md.update(cnonce.getBytes(StringUtil.__ISO_8859_1));
+                md.update(cnonce.getBytes(StandardCharsets.ISO_8859_1));
                 md.update((byte) ':');
-                md.update(qop.getBytes(StringUtil.__ISO_8859_1));
+                md.update(qop.getBytes(StandardCharsets.ISO_8859_1));
                 md.update((byte) ':');
-                md.update(TypeUtil.toString(ha2, 16).getBytes(StringUtil.__ISO_8859_1));
+                md.update(TypeUtil.toString(ha2, 16).getBytes(StandardCharsets.ISO_8859_1));
                 byte[] digest = md.digest();
 
                 // check digest

jetty-security/src/test/java/org/eclipse/jetty/security/ConstraintTest.java

@@ -25,6 +25,7 @@ import static org.junit.Assert.assertTrue;
 import static org.junit.matchers.JUnitMatchers.containsString;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -334,17 +335,17 @@ public class ConstraintTest
         MessageDigest md = MessageDigest.getInstance("MD5");
         byte[] ha1;
         // calc A1 digest
-        md.update(username.getBytes(StringUtil.__ISO_8859_1));
+        md.update(username.getBytes(StandardCharsets.ISO_8859_1));
         md.update((byte) ':');
-        md.update("TestRealm".getBytes(StringUtil.__ISO_8859_1));
+        md.update("TestRealm".getBytes(StandardCharsets.ISO_8859_1));
         md.update((byte) ':');
-        md.update(password.getBytes(StringUtil.__ISO_8859_1));
+        md.update(password.getBytes(StandardCharsets.ISO_8859_1));
         ha1 = md.digest();
         // calc A2 digest
         md.reset();
-        md.update("GET".getBytes(StringUtil.__ISO_8859_1));
+        md.update("GET".getBytes(StandardCharsets.ISO_8859_1));
         md.update((byte) ':');
-        md.update(uri.getBytes(StringUtil.__ISO_8859_1));
+        md.update(uri.getBytes(StandardCharsets.ISO_8859_1));
         byte[] ha2 = md.digest();
 
         // calc digest
@@ -354,17 +355,17 @@ public class ConstraintTest
         // request-digest = <"> < KD ( H(A1), unq(nonce-value) ":" H(A2)
         // ) > <">
 
-        md.update(TypeUtil.toString(ha1, 16).getBytes(StringUtil.__ISO_8859_1));
+        md.update(TypeUtil.toString(ha1, 16).getBytes(StandardCharsets.ISO_8859_1));
         md.update((byte) ':');
-        md.update(nonce.getBytes(StringUtil.__ISO_8859_1));
+        md.update(nonce.getBytes(StandardCharsets.ISO_8859_1));
         md.update((byte) ':');
-        md.update(nc.getBytes(StringUtil.__ISO_8859_1));
+        md.update(nc.getBytes(StandardCharsets.ISO_8859_1));
         md.update((byte) ':');
-        md.update(CNONCE.getBytes(StringUtil.__ISO_8859_1));
+        md.update(CNONCE.getBytes(StandardCharsets.ISO_8859_1));
         md.update((byte) ':');
-        md.update("auth".getBytes(StringUtil.__ISO_8859_1));
+        md.update("auth".getBytes(StandardCharsets.ISO_8859_1));
         md.update((byte) ':');
-        md.update(TypeUtil.toString(ha2, 16).getBytes(StringUtil.__ISO_8859_1));
+        md.update(TypeUtil.toString(ha2, 16).getBytes(StandardCharsets.ISO_8859_1));
         byte[] digest = md.digest();
 
         // check digest

jetty-server/src/main/java/org/eclipse/jetty/server/HttpChannel.java

@@ -22,6 +22,7 @@ import java.io.IOException;
 import java.net.InetSocketAddress;
 import java.nio.ByteBuffer;
 import java.nio.channels.ClosedChannelException;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 
@@ -451,7 +452,7 @@ public class HttpChannel<T> implements HttpParser.RequestHandler<T>, Runnable
         {
             LOG.warn("Failed UTF-8 decode for request path, trying ISO-8859-1");
             LOG.ignore(e);
-            path = _uri.getDecodedPath(StringUtil.__ISO_8859_1);
+            path = _uri.getDecodedPath(StandardCharsets.ISO_8859_1);
         }
         
         String info = URIUtil.canonicalPath(path);

jetty-server/src/main/java/org/eclipse/jetty/server/LocalConnector.java

@@ -20,6 +20,7 @@ package org.eclipse.jetty.server;
 
 import java.io.IOException;
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.Executor;
@@ -100,8 +101,8 @@ public class LocalConnector extends AbstractConnector
      */
     public String getResponses(String requests,long idleFor,TimeUnit units) throws Exception
     {
-        ByteBuffer result = getResponses(BufferUtil.toBuffer(requests,StringUtil.__UTF8_CHARSET),idleFor,units);
-        return result==null?null:BufferUtil.toString(result,StringUtil.__UTF8_CHARSET);
+        ByteBuffer result = getResponses(BufferUtil.toBuffer(requests,StandardCharsets.UTF_8),idleFor,units);
+        return result==null?null:BufferUtil.toString(result,StandardCharsets.UTF_8);
     }
 
     /** Sends requests and get's responses based on thread activity.
@@ -150,7 +151,7 @@ public class LocalConnector extends AbstractConnector
      */
     public LocalEndPoint executeRequest(String rawRequest)
     {
-        return executeRequest(BufferUtil.toBuffer(rawRequest,StringUtil.__UTF8_CHARSET));
+        return executeRequest(BufferUtil.toBuffer(rawRequest, StandardCharsets.UTF_8));
     }
 
     private LocalEndPoint executeRequest(ByteBuffer rawRequest)
@@ -191,7 +192,7 @@ public class LocalConnector extends AbstractConnector
             // TODO this is a busy wait
             while(getIn()==null || BufferUtil.hasContent(getIn()))
                 Thread.yield();
-            setInput(BufferUtil.toBuffer(s, StringUtil.__UTF8_CHARSET));
+            setInput(BufferUtil.toBuffer(s, StandardCharsets.UTF_8));
         }
 
         @Override

jetty-server/src/main/java/org/eclipse/jetty/server/Request.java

@@ -28,6 +28,7 @@ import java.io.UnsupportedEncodingException;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.nio.charset.UnsupportedCharsetException;
 import java.security.Principal;
 import java.util.ArrayList;
@@ -1853,7 +1854,7 @@ public class Request implements HttpServletRequest
     /* ------------------------------------------------------------ */
     /**
      * Set the character encoding used for the query string. This call will effect the return of getQueryString and getParamaters. It must be called before any
-     * geParameter methods.
+     * getParameter methods.
      *
      * The request attribute "org.eclipse.jetty.server.server.Request.queryEncoding" may be set as an alternate method of calling setQueryEncoding.
      *
@@ -2080,6 +2081,7 @@ public class Request implements HttpServletRequest
             setAttribute(__MULTIPART_INPUT_STREAM, _multiPartInputStream);
             setAttribute(__MULTIPART_CONTEXT, _context);
             Collection<Part> parts = _multiPartInputStream.getParts(); //causes parsing
+            ByteArrayOutputStream os = null;
             for (Part p:parts)
             {
                 MultiPartInputStreamParser.MultiPart mp = (MultiPartInputStreamParser.MultiPart)p;
@@ -2090,21 +2092,17 @@ public class Request implements HttpServletRequest
                     if (mp.getContentType() != null)
                         charset = MimeTypes.getCharsetFromContentType(mp.getContentType());
 
-                    ByteArrayOutputStream os = null;
-                    InputStream is = mp.getInputStream(); //get the bytes regardless of being in memory or in temp file
-                    try
+                    //get the bytes regardless of being in memory or in temp file
+                    try (InputStream is = mp.getInputStream())
                     {
-                        os = new ByteArrayOutputStream();
+                        if (os == null)
+                            os = new ByteArrayOutputStream();
                         IO.copy(is, os);
-                        String content=new String(os.toByteArray(),charset==null?StringUtil.__UTF8:charset);   
+                        String content=new String(os.toByteArray(),charset==null?StandardCharsets.UTF_8:Charset.forName(charset));
                         getParameter(""); //cause params to be evaluated
                         getParameters().add(mp.getName(), content);
                     }
-                    finally
-                    {
-                        IO.close(os);
-                        IO.close(is);
-                    }
+                    os.reset();
                 }
             }
         }
@@ -2149,7 +2147,7 @@ public class Request implements HttpServletRequest
     {
         // extract parameters from dispatch query
         MultiMap<String> parameters = new MultiMap<>();
-        UrlEncoded.decodeTo(query,parameters, StringUtil.__UTF8_CHARSET,-1); //have to assume UTF-8 because we can't know otherwise
+        UrlEncoded.decodeTo(query,parameters, StandardCharsets.UTF_8,-1); //have to assume UTF-8 because we can't know otherwise
 
         boolean merge_old_query = false;
 
@@ -2174,7 +2172,7 @@ public class Request implements HttpServletRequest
                 
                 
                 MultiMap<String> overridden_new_query = new MultiMap<>();
-                UrlEncoded.decodeTo(query,overridden_new_query,StringUtil.__UTF8_CHARSET,-1); //have to assume utf8 as we cannot know otherwise
+                UrlEncoded.decodeTo(query,overridden_new_query,StandardCharsets.UTF_8,-1); //have to assume utf8 as we cannot know otherwise
 
                 for(String name: overridden_old_query.keySet())
                 {

jetty-server/src/main/java/org/eclipse/jetty/server/ShutdownMonitor.java

@@ -25,6 +25,7 @@ import java.io.OutputStream;
 import java.net.InetAddress;
 import java.net.ServerSocket;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 import java.util.Properties;
 
 import org.eclipse.jetty.util.StringUtil;
@@ -112,7 +113,7 @@ public class ShutdownMonitor
 
                         // Reply to client
                         debug("Informing client that we are stopped.");
-                        out.write("Stopped\r\n".getBytes(StringUtil.__UTF8));
+                        out.write("Stopped\r\n".getBytes(StandardCharsets.UTF_8));
                         out.flush();
 
                         // Shutdown Monitor
@@ -131,7 +132,7 @@ public class ShutdownMonitor
                     else if ("status".equals(cmd))
                     {
                         // Reply to client
-                        out.write("OK\r\n".getBytes(StringUtil.__UTF8));
+                        out.write("OK\r\n".getBytes(StandardCharsets.UTF_8));
                         out.flush();
                     }
                 }

jetty-server/src/test/java/org/eclipse/jetty/server/AbstractHttpTest.java

@@ -28,6 +28,7 @@ import java.io.OutputStreamWriter;
 import java.io.PrintWriter;
 import java.net.Socket;
 import java.net.URISyntaxException;
+import java.nio.charset.StandardCharsets;
 
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
@@ -75,7 +76,7 @@ public abstract class AbstractHttpTest
     {
         Socket socket = new Socket("localhost", connector.getLocalPort());
         socket.setSoTimeout((int)connector.getIdleTimeout());
-        BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF-8"));
+        BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream(), StandardCharsets.UTF_8));
         PrintWriter writer = new PrintWriter(new OutputStreamWriter(socket.getOutputStream()));
         String request = "GET / " + httpVersion + "\r\n";
 

jetty-server/src/test/java/org/eclipse/jetty/server/AsyncRequestReadTest.java

@@ -30,6 +30,7 @@ import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.io.PrintWriter;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.Exchanger;
@@ -96,7 +97,7 @@ public class AsyncRequestReadTest
                     "Content-Length: "+content.length+"\r\n"+
                     "Content-Type: bytes\r\n"+
                     "\r\n";
-            byte[] h=header.getBytes(StringUtil.__ISO_8859_1);
+            byte[] h=header.getBytes(StandardCharsets.ISO_8859_1);
             out.write(h);
             out.write(content);
             
@@ -108,7 +109,7 @@ public class AsyncRequestReadTest
                     "Content-Type: bytes\r\n"+
                     "Connection: close\r\n"+
                     "\r\n";
-            h=header.getBytes(StringUtil.__ISO_8859_1);
+            h=header.getBytes(StandardCharsets.ISO_8859_1);
             out.write(h);
             out.write(content);
             out.flush();
@@ -244,7 +245,7 @@ public class AsyncRequestReadTest
                     "Content-Length: "+content.length+"\r\n"+
                     "Content-Type: bytes\r\n"+
                     "\r\n";
-            byte[] h=header.getBytes(StringUtil.__ISO_8859_1);
+            byte[] h=header.getBytes(StandardCharsets.ISO_8859_1);
             out.write(h);
             out.write(content);
             
@@ -254,7 +255,7 @@ public class AsyncRequestReadTest
                     "Content-Type: bytes\r\n"+
                     "Connection: close\r\n"+
                     "\r\n";
-            h=header.getBytes(StringUtil.__ISO_8859_1);
+            h=header.getBytes(StandardCharsets.ISO_8859_1);
             out.write(h);
             out.write(content);
             out.flush();
@@ -294,7 +295,7 @@ public class AsyncRequestReadTest
                     "Content-Length: "+content.length+"\r\n"+
                     "Content-Type: bytes\r\n"+
                     "\r\n";
-            byte[] h=header.getBytes(StringUtil.__ISO_8859_1);
+            byte[] h=header.getBytes(StandardCharsets.ISO_8859_1);
             out.write(h);
             out.write(content,0,4096);
             out.flush();
@@ -329,7 +330,7 @@ public class AsyncRequestReadTest
                     "Content-Length: "+content.length+"\r\n"+
                     "Content-Type: bytes\r\n"+
                     "\r\n";
-            byte[] h=header.getBytes(StringUtil.__ISO_8859_1);
+            byte[] h=header.getBytes(StandardCharsets.ISO_8859_1);
             out.write(h);
             out.write(content,0,4096);
             out.flush();

jetty-server/src/test/java/org/eclipse/jetty/server/AsyncStressTest.java

@@ -24,6 +24,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.net.InetAddress;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 import java.util.Random;
 import java.util.Timer;
 import java.util.TimerTask;
@@ -140,7 +141,7 @@ public class AsyncStressTest
                                 "result: "+__paths[p][1]+"\r\n"+
                                 ((l+1<loops)?"":"Connection: close\r\n")+
                                 "\r\n";
-                socket[i].getOutputStream().write(request.getBytes("UTF-8"));
+                socket[i].getOutputStream().write(request.getBytes(StandardCharsets.UTF_8));
                 socket[i].getOutputStream().flush();
             }
             if (l%80==0)
@@ -155,7 +156,7 @@ public class AsyncStressTest
         String[] results=new String[connections];
         for (int i=0;i<connections;i++)
         {
-            results[i]=IO.toString(socket[i].getInputStream(),"UTF-8");
+            results[i]=IO.toString(socket[i].getInputStream(),StandardCharsets.UTF_8);
             if (i%80==0)
                 System.err.println();
             System.err.print('-');

jetty-server/src/test/java/org/eclipse/jetty/server/ConnectionOpenCloseTest.java

@@ -24,6 +24,7 @@ import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -91,7 +92,7 @@ public class ConnectionOpenCloseTest extends AbstractHttpTest
                 "GET / HTTP/1.1\r\n" +
                 "Host: localhost:" + connector.getLocalPort() + "\r\n" +
                 "Connection: close\r\n" +
-                "\r\n").getBytes("UTF-8"));
+                "\r\n").getBytes(StandardCharsets.UTF_8));
         output.flush();
 
         BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
@@ -162,7 +163,7 @@ public class ConnectionOpenCloseTest extends AbstractHttpTest
                 "GET / HTTP/1.1\r\n" +
                 "Host: localhost:" + connector.getLocalPort() + "\r\n" +
                 "Connection: close\r\n" +
-                "\r\n").getBytes("UTF-8"));
+                "\r\n").getBytes(StandardCharsets.UTF_8));
         output.flush();
 
         BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));

jetty-server/src/test/java/org/eclipse/jetty/server/DumpHandler.java

@@ -24,6 +24,7 @@ import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.io.Reader;
 import java.io.Writer;
+import java.nio.charset.StandardCharsets;
 import java.util.Enumeration;
 
 import javax.servlet.ServletException;
@@ -97,7 +98,7 @@ public class DumpHandler extends AbstractHandler
 
         OutputStream out = response.getOutputStream();
         ByteArrayOutputStream buf = new ByteArrayOutputStream(2048);
-        Writer writer = new OutputStreamWriter(buf,StringUtil.__ISO_8859_1);
+        Writer writer = new OutputStreamWriter(buf,StandardCharsets.ISO_8859_1);
         writer.write("<html><h1>"+label+"</h1>");
         writer.write("<pre>\npathInfo="+request.getPathInfo()+"\n</pre>\n");
         writer.write("<pre>\ncontentType="+request.getContentType()+"\n</pre>\n");

jetty-server/src/test/java/org/eclipse/jetty/server/GracefulStopTest.java

@@ -20,6 +20,7 @@ package org.eclipse.jetty.server;
 
 import java.io.IOException;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.TimeUnit;
 
 import javax.servlet.ServletException;
@@ -76,7 +77,7 @@ public class GracefulStopTest
 
         try(Socket socket = new Socket("localhost",server.getBean(NetworkConnector.class).getLocalPort());)
         {
-            socket.getOutputStream().write("GET / HTTP/1.0\r\n\r\n".getBytes(StringUtil.__ISO_8859_1_CHARSET));
+            socket.getOutputStream().write("GET / HTTP/1.0\r\n\r\n".getBytes(StandardCharsets.ISO_8859_1));
             String out = IO.toString(socket.getInputStream());
             Assert.assertThat(out,Matchers.containsString("200 OK"));
         }

jetty-server/src/test/java/org/eclipse/jetty/server/HostHeaderCustomizerTest.java

@@ -23,6 +23,7 @@ import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
@@ -71,10 +72,10 @@ public class HostHeaderCustomizerTest
                 String request = "" +
                         "GET / HTTP/1.0\r\n" +
                         "\r\n";
-                output.write(request.getBytes("UTF-8"));
+                output.write(request.getBytes(StandardCharsets.UTF_8));
                 output.flush();
 
-                BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF-8"));
+                BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream(), StandardCharsets.UTF_8));
                 SimpleHttpParser parser = new SimpleHttpParser();
                 SimpleHttpResponse response = parser.readResponse(input);
 

jetty-server/src/test/java/org/eclipse/jetty/server/HttpServerTestBase.java

@@ -37,6 +37,7 @@ import java.io.OutputStream;
 import java.net.Socket;
 import java.net.URI;
 import java.net.URL;
+import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.Random;
 import java.util.concurrent.CountDownLatch;
@@ -966,12 +967,12 @@ public abstract class HttpServerTestBase extends HttpServerTestFixture
                 }
             }
 
-            String in = new String(b, 0, i, "utf-8");
+            String in = new String(b, 0, i, StandardCharsets.UTF_8);
             assertTrue(in.contains("123456789"));
             assertTrue(in.contains("abcdefghZ"));
             assertFalse(in.contains("Wibble"));
 
-            in = new String(b, i, b.length - i, "utf-16");
+            in = new String(b, i, b.length - i, StandardCharsets.UTF_16);
             assertEquals("Wibble\n", in);
         }
     }
@@ -1416,11 +1417,11 @@ public abstract class HttpServerTestBase extends HttpServerTestFixture
                 {
                     for (int i = 0; i < REQS; i++)
                     {
-                        out.write("GET / HTTP/1.1\r\nHost: localhost\r\n".getBytes(StringUtil.__ISO_8859_1));
-                        out.write(("Content-Length: " + bytes.length + "\r\n" + "\r\n").getBytes(StringUtil.__ISO_8859_1));
+                        out.write("GET / HTTP/1.1\r\nHost: localhost\r\n".getBytes(StandardCharsets.ISO_8859_1));
+                        out.write(("Content-Length: " + bytes.length + "\r\n" + "\r\n").getBytes(StandardCharsets.ISO_8859_1));
                         out.write(bytes, 0, bytes.length);
                     }
-                    out.write("GET / HTTP/1.1\r\nHost: last\r\nConnection: close\r\n\r\n".getBytes(StringUtil.__ISO_8859_1));
+                    out.write("GET / HTTP/1.1\r\nHost: last\r\nConnection: close\r\n\r\n".getBytes(StandardCharsets.ISO_8859_1));
                     out.flush();
                 }
                 catch (Exception e)

jetty-server/src/test/java/org/eclipse/jetty/server/HttpURITest.java

@@ -28,6 +28,7 @@ import java.io.UnsupportedEncodingException;
 import java.net.URLDecoder;
 import java.net.URLEncoder;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 
 import org.eclipse.jetty.http.HttpURI;
 import org.eclipse.jetty.util.MultiMap;
@@ -330,7 +331,7 @@ public class HttpURITest
 
         huri=new HttpURI(uri);
         params = new MultiMap<>();
-        huri.decodeQueryTo(params,"UTF-8");
+        huri.decodeQueryTo(params,StandardCharsets.UTF_8);
         assertEquals("data"+Utf8Appendable.REPLACEMENT+"here"+Utf8Appendable.REPLACEMENT,params.getValue("invalid",0));
 
     }
@@ -343,7 +344,7 @@ public class HttpURITest
             HttpURI uri = new HttpURI("/path?value="+URLEncoder.encode(value,"UTF-8"));
 
             MultiMap<String> parameters = new MultiMap<>();
-            uri.decodeQueryTo(parameters,"UTF-8");
+            uri.decodeQueryTo(parameters,StandardCharsets.UTF_8);
             assertEquals(value,parameters.getString("value"));
         }
     }
@@ -366,7 +367,7 @@ public class HttpURITest
         {
             try
             {
-                byte[] buf = connect_tests[i][0].getBytes(StringUtil.__UTF8);
+                byte[] buf = connect_tests[i][0].getBytes(StandardCharsets.UTF_8);
 
                 uri.parseConnect(buf,2,buf.length-4);
                 assertEquals("path"+i,connect_tests[i][0].trim(),uri.getPath());
@@ -384,13 +385,13 @@ public class HttpURITest
     public void testNonURIAscii() throws Exception
     {
         String url = "http://www.foo.com/ma\u00F1ana";
-        byte[] asISO = url.getBytes("ISO-8859-1");
-        new String(asISO, "ISO-8859-1");
+        byte[] asISO = url.getBytes(StandardCharsets.ISO_8859_1);
+        new String(asISO, StandardCharsets.ISO_8859_1);
 
         //use a non UTF-8 charset as the encoding and url-escape as per
         //http://www.w3.org/TR/html40/appendix/notes.html#non-ascii-chars
         String s = URLEncoder.encode(url, "ISO-8859-1");
-        HttpURI uri = new HttpURI(Charset.forName("ISO-8859-1"));
+        HttpURI uri = new HttpURI(StandardCharsets.ISO_8859_1);
 
         //parse it, using the same encoding
         uri.parse(s);

jetty-server/src/test/java/org/eclipse/jetty/server/HttpWriterTest.java

@@ -22,6 +22,7 @@ import static org.junit.Assert.assertEquals;
 
 import java.io.IOException;
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 
 import org.eclipse.jetty.io.ByteBufferPool;
 import org.eclipse.jetty.io.MappedByteBufferPool;
@@ -67,7 +68,7 @@ public class HttpWriterTest
     {
         HttpWriter _writer = new Utf8HttpWriter(_httpOut);
         _writer.write("Now is the time");
-        assertArrayEquals("Now is the time".getBytes(StringUtil.__UTF8),BufferUtil.toArray(_bytes));
+        assertArrayEquals("Now is the time".getBytes(StandardCharsets.UTF_8),BufferUtil.toArray(_bytes));
     }
 
     @Test
@@ -75,7 +76,7 @@ public class HttpWriterTest
     {
         HttpWriter _writer = new Utf8HttpWriter(_httpOut);
         _writer.write("How now \uFF22rown cow");
-        assertArrayEquals("How now \uFF22rown cow".getBytes(StringUtil.__UTF8),BufferUtil.toArray(_bytes));
+        assertArrayEquals("How now \uFF22rown cow".getBytes(StandardCharsets.UTF_8),BufferUtil.toArray(_bytes));
     }
 
     @Test
@@ -83,7 +84,7 @@ public class HttpWriterTest
     {
         HttpWriter _writer = new EncodingHttpWriter(_httpOut,StringUtil.__UTF16);
         _writer.write("How now \uFF22rown cow");
-        assertArrayEquals("How now \uFF22rown cow".getBytes(StringUtil.__UTF16),BufferUtil.toArray(_bytes));
+        assertArrayEquals("How now \uFF22rown cow".getBytes(StandardCharsets.UTF_16),BufferUtil.toArray(_bytes));
     }
 
     @Test
@@ -93,7 +94,7 @@ public class HttpWriterTest
         String data="xxx\uD801\uDC00xxx";
         _writer.write(data);
         assertEquals("787878F0909080787878",TypeUtil.toHexString(BufferUtil.toArray(_bytes)));
-        assertArrayEquals(data.getBytes(StringUtil.__UTF8),BufferUtil.toArray(_bytes));
+        assertArrayEquals(data.getBytes(StandardCharsets.UTF_8),BufferUtil.toArray(_bytes));
         assertEquals(3+4+3,_bytes.remaining());
 
         Utf8StringBuilder buf = new Utf8StringBuilder();
@@ -109,7 +110,7 @@ public class HttpWriterTest
         final String multiByteDuplicateStr = "\uFF22";
         int remainSize = 1;
 
-        int multiByteStrByteLength = multiByteDuplicateStr.getBytes("UTF-8").length;
+        int multiByteStrByteLength = multiByteDuplicateStr.getBytes(StandardCharsets.UTF_8).length;
         StringBuilder sb = new StringBuilder();
         for (int i = 0; i < HttpWriter.MAX_OUTPUT_CHARS - multiByteStrByteLength; i++) {
           sb.append(singleByteStr);
@@ -125,7 +126,7 @@ public class HttpWriterTest
 
         _writer.write(buf, 0, length);
 
-        assertEquals(sb.toString(),new String(BufferUtil.toArray(_bytes),StringUtil.__UTF8));
+        assertEquals(sb.toString(),new String(BufferUtil.toArray(_bytes),StandardCharsets.UTF_8));
     }
 
     @Test
@@ -133,7 +134,7 @@ public class HttpWriterTest
     {
         HttpWriter _writer = new Iso88591HttpWriter(_httpOut);
         _writer.write("How now \uFF22rown cow");
-        assertEquals("How now ?rown cow",new String(BufferUtil.toArray(_bytes),StringUtil.__ISO_8859_1));
+        assertEquals("How now ?rown cow",new String(BufferUtil.toArray(_bytes),StandardCharsets.ISO_8859_1));
     }
 
     @Test
@@ -143,11 +144,11 @@ public class HttpWriterTest
 
         String source = "\uD842\uDF9F";
 
-        byte[] bytes = source.getBytes(StringUtil.__UTF8);
+        byte[] bytes = source.getBytes(StandardCharsets.UTF_8);
         _writer.write(source.toCharArray(),0,source.toCharArray().length);
 
         java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream();
-        java.io.OutputStreamWriter osw = new java.io.OutputStreamWriter(baos ,StringUtil.__UTF8 );
+        java.io.OutputStreamWriter osw = new java.io.OutputStreamWriter(baos, StandardCharsets.UTF_8);
         osw.write(source.toCharArray(),0,source.toCharArray().length);
         osw.flush();
 
@@ -181,11 +182,11 @@ public class HttpWriterTest
         }
         String source = sb.toString();
 
-        byte[] bytes = source.getBytes(StringUtil.__UTF8);
+        byte[] bytes = source.getBytes(StandardCharsets.UTF_8);
         _writer.write(source.toCharArray(),0,source.toCharArray().length);
 
         java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream();
-        java.io.OutputStreamWriter osw = new java.io.OutputStreamWriter(baos ,StringUtil.__UTF8);
+        java.io.OutputStreamWriter osw = new java.io.OutputStreamWriter(baos, StandardCharsets.UTF_8);
         osw.write(source.toCharArray(),0,source.toCharArray().length);
         osw.flush();
 
@@ -219,11 +220,11 @@ public class HttpWriterTest
         }
         String source = sb.toString();
 
-        byte[] bytes = source.getBytes(StringUtil.__UTF8);
+        byte[] bytes = source.getBytes(StandardCharsets.UTF_8);
         _writer.write(source.toCharArray(),0,source.toCharArray().length);
 
         java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream();
-        java.io.OutputStreamWriter osw = new java.io.OutputStreamWriter(baos,StringUtil.__UTF8);
+        java.io.OutputStreamWriter osw = new java.io.OutputStreamWriter(baos,StandardCharsets.UTF_8);
         osw.write(source.toCharArray(),0,source.toCharArray().length);
         osw.flush();
 

jetty-server/src/test/java/org/eclipse/jetty/server/LowResourcesMonitorTest.java

@@ -24,6 +24,7 @@ import static org.hamcrest.Matchers.not;
 import static org.junit.Assert.assertThat;
 
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.concurrent.CountDownLatch;
 
@@ -161,7 +162,7 @@ public class LowResourcesMonitorTest
         for (int i=0;i<socket.length;i++)
             Assert.assertEquals(-1,socket[i].getInputStream().read());
         
-        newSocket.getOutputStream().write("GET / HTTP/1.0\r\n\r\n".getBytes(StringUtil.__UTF8_CHARSET));
+        newSocket.getOutputStream().write("GET / HTTP/1.0\r\n\r\n".getBytes(StandardCharsets.UTF_8));
         Assert.assertEquals('H',newSocket.getInputStream().read());
         
     }
@@ -183,11 +184,11 @@ public class LowResourcesMonitorTest
         Thread.sleep(1200);
         Assert.assertTrue(_lowResourcesMonitor.isLowOnResources());
         Assert.assertEquals(-1,socket0.getInputStream().read());
-        socket1.getOutputStream().write("G".getBytes(StringUtil.__UTF8_CHARSET));
+        socket1.getOutputStream().write("G".getBytes(StandardCharsets.UTF_8));
 
         Thread.sleep(1200);
         Assert.assertTrue(_lowResourcesMonitor.isLowOnResources());
-        socket1.getOutputStream().write("E".getBytes(StringUtil.__UTF8_CHARSET));
+        socket1.getOutputStream().write("E".getBytes(StandardCharsets.UTF_8));
 
         Thread.sleep(1200);
         Assert.assertTrue(_lowResourcesMonitor.isLowOnResources());

jetty-server/src/test/java/org/eclipse/jetty/server/NetworkTrafficListenerTest.java

@@ -27,6 +27,7 @@ import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.Socket;
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicReference;
@@ -130,14 +131,14 @@ public class NetworkTrafficListenerTest
             @Override
             public void incoming(Socket socket, ByteBuffer bytes)
             {
-                incomingData.set(BufferUtil.toString(bytes,StringUtil.__UTF8_CHARSET));
+                incomingData.set(BufferUtil.toString(bytes,StandardCharsets.UTF_8));
                 incomingLatch.countDown();
             }
 
             @Override
             public void outgoing(Socket socket, ByteBuffer bytes)
             {
-                outgoingData.set(outgoingData.get() + BufferUtil.toString(bytes,StringUtil.__UTF8_CHARSET));
+                outgoingData.set(outgoingData.get() + BufferUtil.toString(bytes,StandardCharsets.UTF_8));
                 outgoingLatch.countDown();
             }
         });
@@ -155,7 +156,7 @@ public class NetworkTrafficListenerTest
 
         Socket socket = new Socket("localhost", port);
         OutputStream output = socket.getOutputStream();
-        output.write(request.getBytes("UTF-8"));
+        output.write(request.getBytes(StandardCharsets.UTF_8));
         output.flush();
 
         assertTrue(incomingLatch.await(1, TimeUnit.SECONDS));
@@ -165,7 +166,7 @@ public class NetworkTrafficListenerTest
         assertEquals(expectedResponse, outgoingData.get());
 
         byte[] responseBytes = readResponse(socket);
-        String response = new String(responseBytes, "UTF-8");
+        String response = new String(responseBytes, StandardCharsets.UTF_8);
         assertEquals(expectedResponse, response);
 
         socket.close();
@@ -181,7 +182,7 @@ public class NetworkTrafficListenerTest
             {
                 request.setHandled(true);
                 ServletOutputStream output = servletResponse.getOutputStream();
-                output.write(responseContent.getBytes("UTF-8"));
+                output.write(responseContent.getBytes(StandardCharsets.UTF_8));
                 output.write(END_OF_CONTENT);
             }
         });
@@ -194,13 +195,13 @@ public class NetworkTrafficListenerTest
         {
             public void incoming(Socket socket, ByteBuffer bytes)
             {
-                incomingData.set(BufferUtil.toString(bytes,StringUtil.__UTF8_CHARSET));
+                incomingData.set(BufferUtil.toString(bytes,StandardCharsets.UTF_8));
                 incomingLatch.countDown();
             }
 
             public void outgoing(Socket socket, ByteBuffer bytes)
             {
-                outgoingData.set(outgoingData.get() + BufferUtil.toString(bytes,StringUtil.__UTF8_CHARSET));
+                outgoingData.set(outgoingData.get() + BufferUtil.toString(bytes,StandardCharsets.UTF_8));
                 outgoingLatch.countDown();
             }
         });
@@ -218,7 +219,7 @@ public class NetworkTrafficListenerTest
 
         Socket socket = new Socket("localhost", port);
         OutputStream output = socket.getOutputStream();
-        output.write(request.getBytes("UTF-8"));
+        output.write(request.getBytes(StandardCharsets.UTF_8));
         output.flush();
 
         assertTrue(incomingLatch.await(1, TimeUnit.SECONDS));
@@ -228,7 +229,7 @@ public class NetworkTrafficListenerTest
         assertEquals(expectedResponse, outgoingData.get());
 
         byte[] responseBytes = readResponse(socket);
-        String response = new String(responseBytes, "UTF-8");
+        String response = new String(responseBytes, StandardCharsets.UTF_8);
         assertEquals(expectedResponse, response);
 
         socket.close();
@@ -246,9 +247,9 @@ public class NetworkTrafficListenerTest
             {
                 request.setHandled(true);
                 ServletOutputStream output = servletResponse.getOutputStream();
-                output.write(responseChunk1.getBytes("UTF-8"));
+                output.write(responseChunk1.getBytes(StandardCharsets.UTF_8));
                 output.flush();
-                output.write(responseChunk2.getBytes("UTF-8"));
+                output.write(responseChunk2.getBytes(StandardCharsets.UTF_8));
                 output.flush();
             }
         });
@@ -261,13 +262,13 @@ public class NetworkTrafficListenerTest
         {
             public void incoming(Socket socket, ByteBuffer bytes)
             {
-                incomingData.set(BufferUtil.toString(bytes,StringUtil.__UTF8_CHARSET));
+                incomingData.set(BufferUtil.toString(bytes,StandardCharsets.UTF_8));
                 incomingLatch.countDown();
             }
 
             public void outgoing(Socket socket, ByteBuffer bytes)
             {
-                outgoingData.set(outgoingData.get() + BufferUtil.toString(bytes,StringUtil.__UTF8_CHARSET));
+                outgoingData.set(outgoingData.get() + BufferUtil.toString(bytes,StandardCharsets.UTF_8));
                 outgoingLatch.countDown();
             }
         });
@@ -290,7 +291,7 @@ public class NetworkTrafficListenerTest
 
         Socket socket = new Socket("localhost", port);
         OutputStream output = socket.getOutputStream();
-        output.write(request.getBytes("UTF-8"));
+        output.write(request.getBytes(StandardCharsets.UTF_8));
         output.flush();
 
         assertTrue(incomingLatch.await(1, TimeUnit.SECONDS));
@@ -300,7 +301,7 @@ public class NetworkTrafficListenerTest
         assertEquals(expectedResponse, outgoingData.get());
 
         byte[] responseBytes = readResponse(socket);
-        String response = new String(responseBytes, "UTF-8");
+        String response = new String(responseBytes, StandardCharsets.UTF_8);
         assertEquals(expectedResponse, response);
 
         socket.close();
@@ -327,13 +328,13 @@ public class NetworkTrafficListenerTest
         {
             public void incoming(Socket socket, ByteBuffer bytes)
             {
-                incomingData.set(BufferUtil.toString(bytes,StringUtil.__UTF8_CHARSET));
+                incomingData.set(BufferUtil.toString(bytes,StandardCharsets.UTF_8));
                 incomingLatch.countDown();
             }
 
             public void outgoing(Socket socket, ByteBuffer bytes)
             {
-                outgoingData.set(outgoingData.get() + BufferUtil.toString(bytes,StringUtil.__UTF8_CHARSET));
+                outgoingData.set(outgoingData.get() + BufferUtil.toString(bytes,StandardCharsets.UTF_8));
                 outgoingLatch.countDown();
             }
         });
@@ -355,7 +356,7 @@ public class NetworkTrafficListenerTest
 
         Socket socket = new Socket("localhost", port);
         OutputStream output = socket.getOutputStream();
-        output.write(request.getBytes("UTF-8"));
+        output.write(request.getBytes(StandardCharsets.UTF_8));
         output.flush();
 
         assertTrue(incomingLatch.await(1, TimeUnit.SECONDS));
@@ -365,7 +366,7 @@ public class NetworkTrafficListenerTest
         assertEquals(expectedResponse, outgoingData.get());
 
         byte[] responseBytes = readResponse(socket);
-        String response = new String(responseBytes, "UTF-8");
+        String response = new String(responseBytes, StandardCharsets.UTF_8);
         assertEquals(expectedResponse, response);
 
         socket.close();
@@ -400,12 +401,12 @@ public class NetworkTrafficListenerTest
         {
             public void incoming(Socket socket, ByteBuffer bytes)
             {
-                incomingData.set(incomingData.get() + BufferUtil.toString(bytes,StringUtil.__UTF8_CHARSET));
+                incomingData.set(incomingData.get() + BufferUtil.toString(bytes,StandardCharsets.UTF_8));
             }
 
             public void outgoing(Socket socket, ByteBuffer bytes)
             {
-                outgoingData.set(outgoingData.get() + BufferUtil.toString(bytes,StringUtil.__UTF8_CHARSET));
+                outgoingData.set(outgoingData.get() + BufferUtil.toString(bytes,StandardCharsets.UTF_8));
                 outgoingLatch.countDown();
             }
         });
@@ -429,14 +430,14 @@ public class NetworkTrafficListenerTest
 
         Socket socket = new Socket("localhost", port);
         OutputStream output = socket.getOutputStream();
-        output.write(request.getBytes("UTF-8"));
+        output.write(request.getBytes(StandardCharsets.UTF_8));
         output.flush();
 
         assertTrue(outgoingLatch.await(1, TimeUnit.SECONDS));
         assertEquals(expectedResponse, outgoingData.get());
 
         byte[] responseBytes = readResponse(socket);
-        String response = new String(responseBytes, "UTF-8");
+        String response = new String(responseBytes, StandardCharsets.UTF_8);
         assertEquals(expectedResponse, response);
 
         assertEquals(request, incomingData.get());

jetty-server/src/test/java/org/eclipse/jetty/server/RequestTest.java

@@ -25,6 +25,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.Reader;
 import java.io.UnsupportedEncodingException;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Map;
@@ -553,7 +554,7 @@ public class RequestTest
             {
                 baseRequest.setHandled(true);
                 Reader reader=request.getReader();
-                byte[] b=("read="+reader.read()+"\n").getBytes(StringUtil.__UTF8);
+                byte[] b=("read="+reader.read()+"\n").getBytes(StandardCharsets.UTF_8);
                 response.setContentLength(b.length);
                 response.getOutputStream().write(b);
                 response.flushBuffer();
@@ -602,7 +603,7 @@ public class RequestTest
                 String in = IO.toString(reader);
                 String param = request.getParameter("param");
 
-                byte[] b=("read='"+in+"' param="+param+"\n").getBytes(StringUtil.__UTF8);
+                byte[] b=("read='"+in+"' param="+param+"\n").getBytes(StandardCharsets.UTF_8);
                 response.setContentLength(b.length);
                 response.getOutputStream().write(b);
                 response.flushBuffer();
@@ -637,7 +638,7 @@ public class RequestTest
             {
                 baseRequest.setHandled(true);
                 InputStream in=request.getInputStream();
-                byte[] b=("read="+in.read()+"\n").getBytes(StringUtil.__UTF8);
+                byte[] b=("read="+in.read()+"\n").getBytes(StandardCharsets.UTF_8);
                 response.setContentLength(b.length);
                 response.getOutputStream().write(b);
                 response.flushBuffer();

jetty-server/src/test/java/org/eclipse/jetty/server/SelectChannelAsyncContextTest.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.server;
 
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 
 import org.eclipse.jetty.util.IO;
 
@@ -35,7 +36,7 @@ public class SelectChannelAsyncContextTest extends LocalAsyncContextTest
     {
         ServerConnector connector = (ServerConnector)_connector;
         Socket socket = new Socket((String)null,connector.getLocalPort());
-        socket.getOutputStream().write(request.getBytes("UTF-8"));
+        socket.getOutputStream().write(request.getBytes(StandardCharsets.UTF_8));
         return IO.toString(socket.getInputStream());
     }
 }

jetty-server/src/test/java/org/eclipse/jetty/server/SelectChannelTimeoutTest.java

@@ -24,6 +24,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.UnsupportedEncodingException;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 import java.util.Locale;
 
 import org.eclipse.jetty.server.session.SessionHandler;
@@ -101,7 +102,7 @@ public class SelectChannelTimeoutTest extends ConnectorTimeoutTest
         ServerConnector connector = (ServerConnector)_connector;
         Socket socket = new Socket((String)null,connector.getLocalPort());
         socket.setSoTimeout(10 * MAX_IDLE_TIME);
-        socket.getOutputStream().write(request.getBytes("UTF-8"));
+        socket.getOutputStream().write(request.getBytes(StandardCharsets.UTF_8));
         InputStream inputStream = socket.getInputStream();
         long start = System.currentTimeMillis();
         String response = IO.toString(inputStream);

jetty-server/src/test/java/org/eclipse/jetty/server/SlowClientWithPipelinedRequestTest.java

@@ -25,6 +25,7 @@ import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.Socket;
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.concurrent.atomic.AtomicInteger;
 
@@ -118,7 +119,7 @@ public class SlowClientWithPipelinedRequestTest
                 "GET /content HTTP/1.1\r\n" +
                 "Host: localhost:" + connector.getLocalPort() + "\r\n" +
                 "\r\n" +
-                "").getBytes("UTF-8"));
+                "").getBytes(StandardCharsets.UTF_8));
         output.flush();
 
         InputStream input = client.getInputStream();
@@ -131,7 +132,7 @@ public class SlowClientWithPipelinedRequestTest
                 "GET /pipelined HTTP/1.1\r\n" +
                 "Host: localhost:" + connector.getLocalPort() + "\r\n" +
                 "\r\n" +
-                "").getBytes("UTF-8"));
+                "").getBytes(StandardCharsets.UTF_8));
         output.flush();
 
         // Simulate a slow reader

jetty-server/src/test/java/org/eclipse/jetty/server/handler/IPAccessHandlerTest.java

@@ -27,6 +27,7 @@ import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.LinkedHashMap;
@@ -124,7 +125,7 @@ public class IPAccessHandlerTest
             OutputStream output = socket.getOutputStream();
             BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             Response response = readResponse(input);

jetty-server/src/test/java/org/eclipse/jetty/server/ssl/SSLCloseTest.java

@@ -24,6 +24,7 @@ import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 
 import javax.net.ssl.SSLContext;
 import javax.servlet.ServletException;
@@ -105,7 +106,7 @@ public class SSLCloseTest
                 // data=data+data+data+data+data+data+data+data+data+data+data+data+data;
                 // data=data+data+data+data+data+data+data+data+data+data+data+data+data;
                 data=data+data+data+data;
-                byte[] bytes=data.getBytes("UTF-8");
+                byte[] bytes=data.getBytes(StandardCharsets.UTF_8);
 
                 for (int i=0;i<2;i++)
                 {

jetty-servlet/src/test/java/org/eclipse/jetty/servlet/AsyncContextListenersTest.java

@@ -23,6 +23,7 @@ import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.atomic.AtomicInteger;
 import javax.servlet.AsyncContext;
 import javax.servlet.AsyncEvent;
@@ -109,10 +110,10 @@ public class AsyncContextListenersTest
                     "GET " + path + " HTTP/1.1\r\n" +
                     "Host: localhost\r\n" +
                     "\r\n";
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
-            BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF-8"));
+            BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream(), StandardCharsets.UTF_8));
             SimpleHttpParser parser = new SimpleHttpParser();
             SimpleHttpResponse response = parser.readResponse(reader);
             Assert.assertEquals("200", response.getCode());
@@ -120,7 +121,7 @@ public class AsyncContextListenersTest
 
             // Send a second request
             completes.set(0);
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             response = parser.readResponse(reader);
@@ -180,10 +181,10 @@ public class AsyncContextListenersTest
                     "GET " + path + " HTTP/1.1\r\n" +
                     "Host: localhost\r\n" +
                     "\r\n";
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
-            BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF-8"));
+            BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream(), StandardCharsets.UTF_8));
             SimpleHttpParser parser = new SimpleHttpParser();
             SimpleHttpResponse response = parser.readResponse(reader);
             Assert.assertEquals("200", response.getCode());
@@ -191,7 +192,7 @@ public class AsyncContextListenersTest
 
             // Send a second request
             completes.set(0);
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             response = parser.readResponse(reader);
@@ -258,10 +259,10 @@ public class AsyncContextListenersTest
                     "GET " + path + "/one HTTP/1.1\r\n" +
                     "Host: localhost\r\n" +
                     "\r\n";
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
-            BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF-8"));
+            BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream(), StandardCharsets.UTF_8));
             SimpleHttpParser parser = new SimpleHttpParser();
             SimpleHttpResponse response = parser.readResponse(reader);
             Assert.assertEquals("200", response.getCode());
@@ -269,7 +270,7 @@ public class AsyncContextListenersTest
 
             // Send a second request
             completes.set(0);
-            output.write(request.getBytes("UTF-8"));
+            output.write(request.getBytes(StandardCharsets.UTF_8));
             output.flush();
 
             response = parser.readResponse(reader);

jetty-servlet/src/test/java/org/eclipse/jetty/servlet/AsyncServletLongPollTest.java

@@ -23,6 +23,7 @@ import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 import javax.servlet.AsyncContext;
@@ -122,7 +123,7 @@ public class AsyncServletLongPollTest
                     "Host: localhost:" + connector.getLocalPort() + "\r\n" +
                     "\r\n";
             OutputStream output1 = socket1.getOutputStream();
-            output1.write(request1.getBytes("UTF-8"));
+            output1.write(request1.getBytes(StandardCharsets.UTF_8));
             output1.flush();
 
             Assert.assertTrue(asyncLatch.await(5, TimeUnit.SECONDS));
@@ -134,18 +135,18 @@ public class AsyncServletLongPollTest
                         "Host: localhost:" + connector.getLocalPort() + "\r\n" +
                         "\r\n";
                 OutputStream output2 = socket2.getOutputStream();
-                output2.write(request2.getBytes("UTF-8"));
+                output2.write(request2.getBytes(StandardCharsets.UTF_8));
                 output2.flush();
 
                 SimpleHttpParser parser2 = new SimpleHttpParser();
-                BufferedReader input2 = new BufferedReader(new InputStreamReader(socket2.getInputStream(), "UTF-8"));
+                BufferedReader input2 = new BufferedReader(new InputStreamReader(socket2.getInputStream(), StandardCharsets.UTF_8));
                 SimpleHttpResponse response2 = parser2.readResponse(input2);
                 Assert.assertEquals("200", response2.getCode());
             }
 
             socket1.setSoTimeout(2 * wait);
             SimpleHttpParser parser1 = new SimpleHttpParser();
-            BufferedReader input1 = new BufferedReader(new InputStreamReader(socket1.getInputStream(), "UTF-8"));
+            BufferedReader input1 = new BufferedReader(new InputStreamReader(socket1.getInputStream(), StandardCharsets.UTF_8));
             SimpleHttpResponse response1 = parser1.readResponse(input1);
             Assert.assertEquals(error, response1.getCode());
 
@@ -154,7 +155,7 @@ public class AsyncServletLongPollTest
             String request3 = "GET " + uri + " HTTP/1.1\r\n" +
                     "Host: localhost:" + connector.getLocalPort() + "\r\n" +
                     "\r\n";
-            output1.write(request3.getBytes("UTF-8"));
+            output1.write(request3.getBytes(StandardCharsets.UTF_8));
             output1.flush();
 
             SimpleHttpResponse response3 = parser1.readResponse(input1);

jetty-servlet/src/test/java/org/eclipse/jetty/servlet/AsyncServletTest.java

@@ -21,6 +21,7 @@ package org.eclipse.jetty.servlet;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Timer;
@@ -416,7 +417,7 @@ public class AsyncServletTest
         try (Socket socket = new Socket("localhost",port))
         {
             socket.setSoTimeout(1000000);
-            socket.getOutputStream().write(request.getBytes("UTF-8"));
+            socket.getOutputStream().write(request.getBytes(StandardCharsets.UTF_8));
             return IO.toString(socket.getInputStream());
         }
         catch(Exception e)

jetty-servlet/src/test/java/org/eclipse/jetty/servlet/DefaultServletRangesTest.java

@@ -23,6 +23,7 @@ import static org.junit.Assert.assertTrue;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 
 import org.eclipse.jetty.server.HttpConfiguration;
 import org.eclipse.jetty.server.LocalConnector;
@@ -220,7 +221,7 @@ public class DefaultServletRangesTest
         try
         {
             out = new FileOutputStream(file);
-            out.write(str.getBytes(StringUtil.__UTF8));
+            out.write(str.getBytes(StandardCharsets.UTF_8));
             out.flush();
         }
         finally

jetty-servlet/src/test/java/org/eclipse/jetty/servlet/DefaultServletTest.java

@@ -23,6 +23,7 @@ import static org.junit.Assert.assertTrue;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.util.EnumSet;
 import java.util.regex.Matcher;
@@ -882,7 +883,7 @@ public class DefaultServletTest
         try
         {
             out = new FileOutputStream(file);
-            out.write(str.getBytes(StringUtil.__UTF8));
+            out.write(str.getBytes(StandardCharsets.UTF_8));
             out.flush();
         }
         finally

jetty-servlet/src/test/java/org/eclipse/jetty/servlet/RequestHeadersTest.java

@@ -25,6 +25,7 @@ import java.io.InputStream;
 import java.io.PrintWriter;
 import java.net.HttpURLConnection;
 import java.net.URI;
+import java.nio.charset.StandardCharsets;
 
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
@@ -109,7 +110,7 @@ public class RequestHeadersTest
             
             try (InputStream in = http.getInputStream())
             {
-                String resp = IO.toString(in, "UTF-8");
+                String resp = IO.toString(in, StandardCharsets.UTF_8);
                 Assert.assertThat("Response", resp, is("X-Camel-Type = bactrian"));
             }
         }

jetty-servlets/src/main/java/org/eclipse/jetty/servlets/EventSourceServlet.java

@@ -22,8 +22,7 @@ package org.eclipse.jetty.servlets;
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.StringReader;
-import java.io.UnsupportedEncodingException;
-import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.Enumeration;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
@@ -54,24 +53,10 @@ import javax.servlet.http.HttpServletResponse;
  */
 public abstract class EventSourceServlet extends HttpServlet
 {
-    private static final Charset UTF_8 = Charset.forName("UTF-8");
     private static final byte[] CRLF = new byte[]{'\r', '\n'};
-    private static final byte[] EVENT_FIELD;
-    private static final byte[] DATA_FIELD;
-    private static final byte[] COMMENT_FIELD;
-    static
-    {
-        try
-        {
-            EVENT_FIELD = "event: ".getBytes(UTF_8.name());
-            DATA_FIELD = "data: ".getBytes(UTF_8.name());
-            COMMENT_FIELD = ": ".getBytes(UTF_8.name());
-        }
-        catch (UnsupportedEncodingException x)
-        {
-            throw new RuntimeException(x);
-        }
-    }
+    private static final byte[] EVENT_FIELD = "event: ".getBytes(StandardCharsets.UTF_8);
+    private static final byte[] DATA_FIELD = "data: ".getBytes(StandardCharsets.UTF_8);
+    private static final byte[] COMMENT_FIELD = ": ".getBytes(StandardCharsets.UTF_8);
 
     private ScheduledExecutorService scheduler;
     private int heartBeatPeriod = 10;
@@ -129,7 +114,7 @@ public abstract class EventSourceServlet extends HttpServlet
     protected void respond(HttpServletRequest request, HttpServletResponse response) throws IOException
     {
         response.setStatus(HttpServletResponse.SC_OK);
-        response.setCharacterEncoding(UTF_8.name());
+        response.setCharacterEncoding(StandardCharsets.UTF_8.name());
         response.setContentType("text/event-stream");
         // By adding this header, and not closing the connection,
         // we disable HTTP chunking, and we can use write()+flush()
@@ -164,7 +149,7 @@ public abstract class EventSourceServlet extends HttpServlet
             synchronized (this)
             {
                 output.write(EVENT_FIELD);
-                output.write(name.getBytes(UTF_8.name()));
+                output.write(name.getBytes(StandardCharsets.UTF_8));
                 output.write(CRLF);
                 data(data);
             }
@@ -180,7 +165,7 @@ public abstract class EventSourceServlet extends HttpServlet
                 while ((line = reader.readLine()) != null)
                 {
                     output.write(DATA_FIELD);
-                    output.write(line.getBytes(UTF_8.name()));
+                    output.write(line.getBytes(StandardCharsets.UTF_8));
                     output.write(CRLF);
                 }
                 output.write(CRLF);
@@ -194,7 +179,7 @@ public abstract class EventSourceServlet extends HttpServlet
             synchronized (this)
             {
                 output.write(COMMENT_FIELD);
-                output.write(comment.getBytes(UTF_8.name()));
+                output.write(comment.getBytes(StandardCharsets.UTF_8));
                 output.write(CRLF);
                 output.write(CRLF);
                 flush();

jetty-servlets/src/main/java/org/eclipse/jetty/servlets/MultiPartFilter.java

@@ -24,6 +24,9 @@ import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.UnsupportedEncodingException;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import java.nio.charset.UnsupportedCharsetException;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Enumeration;
@@ -223,7 +226,7 @@ public class MultiPartFilter implements Filter
     /* ------------------------------------------------------------------------------- */
     private static class Wrapper extends HttpServletRequestWrapper
     {
-        String _encoding=StringUtil.__UTF8;
+        Charset _encoding=StandardCharsets.UTF_8;
         MultiMap<Object> _params;
 
         /* ------------------------------------------------------------------------------- */
@@ -339,7 +342,14 @@ public class MultiPartFilter implements Filter
         public void setCharacterEncoding(String enc)
             throws UnsupportedEncodingException
         {
-            _encoding=enc;
+            try
+            {
+                _encoding=Charset.forName(enc);
+            }
+            catch (UnsupportedCharsetException e)
+            {
+                throw new UnsupportedEncodingException(e.getMessage());
+            }
         }
         
         
@@ -350,11 +360,18 @@ public class MultiPartFilter implements Filter
             //check if there is a specific encoding for the parameter
             Object ct = _params.getValue(name+CONTENT_TYPE_SUFFIX,0);
             //use default if not
-            String contentType = _encoding;
+            Charset contentType = _encoding;
             if (ct != null)
             {
                 String tmp = MimeTypes.getCharsetFromContentType((String)ct);
-                contentType = (tmp == null?_encoding:tmp);
+                try
+                {
+                    contentType = (tmp == null?_encoding:Charset.forName(tmp));
+                }
+                catch (UnsupportedCharsetException e)
+                {
+                    throw new UnsupportedEncodingException(e.getMessage());
+                }
             }
             
             return new String(bytes,contentType);

jetty-servlets/src/test/java/org/eclipse/jetty/servlets/AbstractDoSFilterTest.java

@@ -25,6 +25,7 @@ import static org.junit.Assert.assertTrue;
 
 import java.io.IOException;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 import java.util.EnumSet;
 
 import javax.servlet.DispatcherType;
@@ -117,14 +118,14 @@ public abstract class AbstractDoSFilterTest
 
         for (int i=loops;i-->0;)
         {
-            socket.getOutputStream().write(loopRequests.getBytes("UTF-8"));
+            socket.getOutputStream().write(loopRequests.getBytes(StandardCharsets.UTF_8));
             socket.getOutputStream().flush();
             if (i>0 && pauseBetweenLoops>0)
                 Thread.sleep(pauseBetweenLoops);
         }
         if (pauseBeforeLast>0)
             Thread.sleep(pauseBeforeLast);
-        socket.getOutputStream().write(lastRequest.getBytes("UTF-8"));
+        socket.getOutputStream().write(lastRequest.getBytes(StandardCharsets.UTF_8));
         socket.getOutputStream().flush();
 
 
@@ -133,11 +134,11 @@ public abstract class AbstractDoSFilterTest
         {
             // don't read in anything, forcing the request to time out
             Thread.sleep(_requestMaxTime * 2);
-            response = IO.toString(socket.getInputStream(),"UTF-8");
+            response = IO.toString(socket.getInputStream(),StandardCharsets.UTF_8);
         }
         else
         {
-            response = IO.toString(socket.getInputStream(),"UTF-8");
+            response = IO.toString(socket.getInputStream(),StandardCharsets.UTF_8);
         }
         socket.close();
         return response;

jetty-servlets/src/test/java/org/eclipse/jetty/servlets/EventSourceServletTest.java

@@ -24,6 +24,7 @@ import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicReference;
@@ -326,7 +327,7 @@ public class EventSourceServletTest
         handshake += "Host: localhost:" + serverPort + "\r\n";
         handshake += "Accept: text/event-stream\r\n";
         handshake += "\r\n";
-        output.write(handshake.getBytes("UTF-8"));
+        output.write(handshake.getBytes(StandardCharsets.UTF_8));
         output.flush();
     }
 
@@ -334,7 +335,7 @@ public class EventSourceServletTest
     {
         // Read and discard the HTTP response
         InputStream input = socket.getInputStream();
-        BufferedReader reader = new BufferedReader(new InputStreamReader(input, "UTF-8"));
+        BufferedReader reader = new BufferedReader(new InputStreamReader(input, StandardCharsets.UTF_8));
         String line = reader.readLine();
         while (line != null)
         {

jetty-servlets/src/test/java/org/eclipse/jetty/servlets/MultipartFilterTest.java

@@ -31,6 +31,7 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.PrintWriter;
+import java.nio.charset.StandardCharsets;
 import java.util.EnumSet;
 import java.util.Map;
 
@@ -867,7 +868,7 @@ public class MultipartFilterTest
         baos.write(("--" + boundary + "\r\n"+
                 "Content-Disposition: form-data; name=\"ttt\"\r\n"+
                 "Content-Type: application/octet-stream; charset=UTF-8\r\n\r\n").getBytes());
-        baos.write("ttt\u01FCzzz".getBytes(StringUtil.__UTF8));
+        baos.write("ttt\u01FCzzz".getBytes(StandardCharsets.UTF_8));
         baos.write(("\r\n--" + boundary + "--\r\n\r\n").getBytes());
   
         

jetty-spdy/spdy-core/src/main/java/org/eclipse/jetty/spdy/api/DataInfo.java

@@ -208,9 +208,20 @@ public abstract class DataInfo extends Info
      * @return a String with the content of this {@link DataInfo}
      */
     public String asString(String charset, boolean consume)
+    {
+        return asString(Charset.forName(charset), consume);
+    }
+
+    /**
+     *
+     * @param charset the charset used to convert the bytes
+     * @param consume whether to consume the content
+     * @return a String with the content of this {@link DataInfo}
+     */
+    public String asString(Charset charset, boolean consume)
     {
         ByteBuffer buffer = asByteBuffer(consume);
-        return Charset.forName(charset).decode(buffer).toString();
+        return charset.decode(buffer).toString();
     }
 
     /**

jetty-spdy/spdy-core/src/main/java/org/eclipse/jetty/spdy/api/StringDataInfo.java

@@ -18,7 +18,7 @@
 
 package org.eclipse.jetty.spdy.api;
 
-import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.TimeUnit;
 
 /**
@@ -28,11 +28,11 @@ public class StringDataInfo extends BytesDataInfo
 {
     public StringDataInfo(String string, boolean close)
     {
-        super(string.getBytes(Charset.forName("UTF-8")), close);
+        super(string.getBytes(StandardCharsets.UTF_8), close);
     }
 
     public StringDataInfo(long timeout, TimeUnit unit, String string, boolean close)
     {
-        super(timeout, unit, string.getBytes(Charset.forName("UTF-8")), close);
+        super(timeout, unit, string.getBytes(StandardCharsets.UTF_8), close);
     }
 }

jetty-spdy/spdy-core/src/main/java/org/eclipse/jetty/spdy/generator/HeadersBlockGenerator.java

@@ -20,7 +20,7 @@ package org.eclipse.jetty.spdy.generator;
 
 import java.io.ByteArrayOutputStream;
 import java.nio.ByteBuffer;
-import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.Locale;
 
 import org.eclipse.jetty.spdy.CompressionDictionary;
@@ -41,25 +41,24 @@ public class HeadersBlockGenerator
     public ByteBuffer generate(short version, Fields headers)
     {
         // TODO: ByteArrayOutputStream is quite inefficient, but grows on demand; optimize using ByteBuffer ?
-        Charset iso1 = Charset.forName("ISO-8859-1");
         ByteArrayOutputStream buffer = new ByteArrayOutputStream(headers.size() * 64);
         writeCount(version, buffer, headers.size());
         for (Fields.Field header : headers)
         {
             String name = header.name().toLowerCase(Locale.ENGLISH);
-            byte[] nameBytes = name.getBytes(iso1);
+            byte[] nameBytes = name.getBytes(StandardCharsets.ISO_8859_1);
             writeNameLength(version, buffer, nameBytes.length);
             buffer.write(nameBytes, 0, nameBytes.length);
 
             // Most common path first
             String value = header.value();
-            byte[] valueBytes = value.getBytes(iso1);
+            byte[] valueBytes = value.getBytes(StandardCharsets.ISO_8859_1);
             if (header.hasMultipleValues())
             {
                 String[] values = header.values();
                 for (int i = 1; i < values.length; ++i)
                 {
-                    byte[] moreValueBytes = values[i].getBytes(iso1);
+                    byte[] moreValueBytes = values[i].getBytes(StandardCharsets.ISO_8859_1);
                     byte[] newValueBytes = new byte[valueBytes.length + 1 + moreValueBytes.length];
                     System.arraycopy(valueBytes, 0, newValueBytes, 0, valueBytes.length);
                     newValueBytes[valueBytes.length] = 0;

jetty-spdy/spdy-core/src/main/java/org/eclipse/jetty/spdy/parser/HeadersBlockParser.java

@@ -19,7 +19,7 @@
 package org.eclipse.jetty.spdy.parser;
 
 import java.nio.ByteBuffer;
-import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.zip.ZipException;
 
 import org.eclipse.jetty.spdy.CompressionDictionary;
@@ -57,8 +57,6 @@ public abstract class HeadersBlockParser
         data = null;
         ByteBuffer decompressedHeaders = decompress(version, compressedHeaders);
 
-        Charset iso1 = Charset.forName("ISO-8859-1");
-
         // We know the decoded bytes contain the full headers,
         // so optimize instead of looping byte by byte
         int count = readCount(version, decompressedHeaders);
@@ -69,14 +67,14 @@ public abstract class HeadersBlockParser
                 throw new StreamException(streamId, StreamStatus.PROTOCOL_ERROR, "Invalid header name length");
             byte[] nameBytes = new byte[nameLength];
             decompressedHeaders.get(nameBytes);
-            String name = new String(nameBytes, iso1);
+            String name = new String(nameBytes, StandardCharsets.ISO_8859_1);
 
             int valueLength = readValueLength(version, decompressedHeaders);
             if (valueLength == 0)
                 throw new StreamException(streamId, StreamStatus.PROTOCOL_ERROR, "Invalid header value length");
             byte[] valueBytes = new byte[valueLength];
             decompressedHeaders.get(valueBytes);
-            String value = new String(valueBytes, iso1);
+            String value = new String(valueBytes, StandardCharsets.ISO_8859_1);
             // Multi valued headers are separate by NUL
             String[] values = value.split("\u0000");
             // Check if there are multiple NULs (section 2.6.9)

jetty-spdy/spdy-core/src/test/java/org/eclipse/jetty/spdy/api/ClientUsageTest.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.spdy.api;
 
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
@@ -242,7 +243,7 @@ public class ClientUsageTest
                     public void onData(Stream stream, DataInfo dataInfo)
                     {
                         StringBuilder builder = (StringBuilder)stream.getAttribute("builder");
-                        builder.append(dataInfo.asString("UTF-8", true));
+                        builder.append(dataInfo.asString(StandardCharsets.UTF_8, true));
 
                     }
                 }, new Promise.Adapter<Stream>()
@@ -250,9 +251,9 @@ public class ClientUsageTest
                     @Override
                     public void succeeded(Stream stream)
                     {
-                        stream.data(new BytesDataInfo("wee".getBytes(Charset.forName("UTF-8")), false), new Callback.Adapter());
+                        stream.data(new BytesDataInfo("wee".getBytes(StandardCharsets.UTF_8), false), new Callback.Adapter());
                         stream.data(new StringDataInfo("foo", false), new Callback.Adapter());
-                        stream.data(new ByteBufferDataInfo(Charset.forName("UTF-8").encode("bar"), true), new Callback.Adapter());
+                        stream.data(new ByteBufferDataInfo(StandardCharsets.UTF_8.encode("bar"), true), new Callback.Adapter());
                     }
                 }
         );

jetty-spdy/spdy-core/src/test/java/org/eclipse/jetty/spdy/parser/ParseVersusCacheBenchmarkTest.java

@@ -20,6 +20,7 @@ package org.eclipse.jetty.spdy.parser;
 
 import java.nio.ByteBuffer;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
@@ -43,8 +44,7 @@ public class ParseVersusCacheBenchmarkTest
 
         String name = "Content-Type";
         String value = "application/octect-stream";
-        Charset charset = Charset.forName("ISO-8859-1");
-        ByteBuffer buffer = ByteBuffer.wrap((name + value).getBytes(charset));
+        ByteBuffer buffer = ByteBuffer.wrap((name + value).getBytes(StandardCharsets.ISO_8859_1));
         int iterations = 100_000_000;
 
         long begin = System.nanoTime();
@@ -52,12 +52,12 @@ public class ParseVersusCacheBenchmarkTest
         {
             byte[] nameBytes = new byte[name.length()];
             buffer.get(nameBytes);
-            String name2 = new String(nameBytes, charset);
+            String name2 = new String(nameBytes, StandardCharsets.ISO_8859_1);
             Assert.assertEquals(name2, name);
 
             byte[] valueBytes = new byte[value.length()];
             buffer.get(valueBytes);
-            String value2 = new String(valueBytes, charset);
+            String value2 = new String(valueBytes, StandardCharsets.ISO_8859_1);
             Assert.assertEquals(value2, value);
 
             buffer.flip();
@@ -66,8 +66,8 @@ public class ParseVersusCacheBenchmarkTest
         System.err.printf("parse time: %d%n", TimeUnit.NANOSECONDS.toMillis(end - begin));
 
         Map<ByteBuffer, String> map = new HashMap<>();
-        map.put(ByteBuffer.wrap(name.getBytes(charset)), name);
-        map.put(ByteBuffer.wrap(value.getBytes(charset)), value);
+        map.put(ByteBuffer.wrap(name.getBytes(StandardCharsets.ISO_8859_1)), name);
+        map.put(ByteBuffer.wrap(value.getBytes(StandardCharsets.ISO_8859_1)), value);
         final Map<ByteBuffer, String> cache = Collections.unmodifiableMap(map);
 
         begin = System.nanoTime();

jetty-spdy/spdy-http-server/src/test/java/org/eclipse/jetty/spdy/server/http/ProtocolNegotiationTest.java

@@ -24,6 +24,7 @@ import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.net.InetSocketAddress;
+import java.nio.charset.StandardCharsets;
 import java.util.List;
 
 import javax.net.ssl.SSLContext;
@@ -129,11 +130,11 @@ public class ProtocolNegotiationTest
                 "GET / HTTP/1.1\r\n" +
                 "Host: localhost:" + address.getPort() + "\r\n" +
                 "\r\n" +
-                "").getBytes("UTF-8"));
+                "").getBytes(StandardCharsets.UTF_8));
         output.flush();
 
         InputStream input = client.getInputStream();
-        BufferedReader reader = new BufferedReader(new InputStreamReader(input, "UTF-8"));
+        BufferedReader reader = new BufferedReader(new InputStreamReader(input, StandardCharsets.UTF_8));
         String line = reader.readLine();
         Assert.assertTrue(line.contains(" 404 "));
 
@@ -188,11 +189,11 @@ public class ProtocolNegotiationTest
                 "GET / HTTP/1.1\r\n" +
                 "Host: localhost:" + address.getPort() + "\r\n" +
                 "\r\n" +
-                "").getBytes("UTF-8"));
+                "").getBytes(StandardCharsets.UTF_8));
         output.flush();
 
         InputStream input = client.getInputStream();
-        BufferedReader reader = new BufferedReader(new InputStreamReader(input, "UTF-8"));
+        BufferedReader reader = new BufferedReader(new InputStreamReader(input, StandardCharsets.UTF_8));
         String line = reader.readLine();
         Assert.assertTrue(line.contains(" 404 "));
 
@@ -241,11 +242,11 @@ public class ProtocolNegotiationTest
                 "GET / HTTP/1.1\r\n" +
                 "Host: localhost:" + address.getPort() + "\r\n" +
                 "\r\n" +
-                "").getBytes("UTF-8"));
+                "").getBytes(StandardCharsets.UTF_8));
         output.flush();
 
         InputStream input = client.getInputStream();
-        BufferedReader reader = new BufferedReader(new InputStreamReader(input, "UTF-8"));
+        BufferedReader reader = new BufferedReader(new InputStreamReader(input, StandardCharsets.UTF_8));
         String line = reader.readLine();
         Assert.assertTrue(line.contains(" 404 "));
 

jetty-spdy/spdy-http-server/src/test/java/org/eclipse/jetty/spdy/server/http/ServerHTTPSPDYTest.java

@@ -25,6 +25,7 @@ import java.io.InputStream;
 import java.io.OutputStream;
 import java.nio.ByteBuffer;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
@@ -432,7 +433,7 @@ public class ServerHTTPSPDYTest extends AbstractHTTPSPDYTest
                 request.setHandled(true);
                 httpResponse.setStatus(HttpServletResponse.SC_OK);
                 ServletOutputStream output = httpResponse.getOutputStream();
-                output.write(data.getBytes("UTF-8"));
+                output.write(data.getBytes(StandardCharsets.UTF_8));
                 handlerLatch.countDown();
             }
         }), null);
@@ -455,7 +456,7 @@ public class ServerHTTPSPDYTest extends AbstractHTTPSPDYTest
             public void onData(Stream stream, DataInfo dataInfo)
             {
                 assertTrue(dataInfo.isClose());
-                assertEquals(data, dataInfo.asString("UTF-8", true));
+                assertEquals(data, dataInfo.asString(StandardCharsets.UTF_8, true));
                 dataLatch.countDown();
             }
         });
@@ -527,9 +528,9 @@ public class ServerHTTPSPDYTest extends AbstractHTTPSPDYTest
                 request.setHandled(true);
                 httpResponse.setStatus(HttpServletResponse.SC_OK);
                 ServletOutputStream output = httpResponse.getOutputStream();
-                output.write(data1.getBytes("UTF-8"));
+                output.write(data1.getBytes(StandardCharsets.UTF_8));
                 output.flush();
-                output.write(data2.getBytes("UTF-8"));
+                output.write(data2.getBytes(StandardCharsets.UTF_8));
                 handlerLatch.countDown();
             }
         }), null);
@@ -558,9 +559,9 @@ public class ServerHTTPSPDYTest extends AbstractHTTPSPDYTest
                 int data = dataFrames.incrementAndGet();
                 assertTrue(data >= 1 && data <= 2);
                 if (data == 1)
-                    assertEquals(data1, dataInfo.asString("UTF8", true));
+                    assertEquals(data1, dataInfo.asString(StandardCharsets.UTF_8, true));
                 else
-                    assertEquals(data2, dataInfo.asString("UTF8", true));
+                    assertEquals(data2, dataInfo.asString(StandardCharsets.UTF_8, true));
                 dataLatch.countDown();
             }
         });
@@ -744,7 +745,7 @@ public class ServerHTTPSPDYTest extends AbstractHTTPSPDYTest
                 request.setHandled(true);
                 httpResponse.setStatus(HttpServletResponse.SC_OK);
                 ServletOutputStream output = httpResponse.getOutputStream();
-                output.write(data.getBytes("UTF-8"));
+                output.write(data.getBytes(StandardCharsets.UTF_8));
                 output.flush();
                 output.close();
                 handlerLatch.countDown();
@@ -775,7 +776,7 @@ public class ServerHTTPSPDYTest extends AbstractHTTPSPDYTest
                     buffer.write(byteBuffer.get());
                 if (dataInfo.isClose())
                 {
-                    assertEquals(data, new String(buffer.toByteArray(), Charset.forName("UTF-8")));
+                    assertEquals(data, new String(buffer.toByteArray(), StandardCharsets.UTF_8));
                     dataLatch.countDown();
                 }
             }
@@ -801,10 +802,10 @@ public class ServerHTTPSPDYTest extends AbstractHTTPSPDYTest
                 httpResponse.setStatus(HttpServletResponse.SC_OK);
                 ServletOutputStream output = httpResponse.getOutputStream();
                 // Write some
-                output.write(data1.getBytes("UTF-8"));
+                output.write(data1.getBytes(StandardCharsets.UTF_8));
                 // But then change your mind and reset the buffer
                 httpResponse.resetBuffer();
-                output.write(data2.getBytes("UTF-8"));
+                output.write(data2.getBytes(StandardCharsets.UTF_8));
                 handlerLatch.countDown();
             }
         }), null);
@@ -833,7 +834,7 @@ public class ServerHTTPSPDYTest extends AbstractHTTPSPDYTest
                     buffer.write(byteBuffer.get());
                 if (dataInfo.isClose())
                 {
-                    assertEquals(data2, new String(buffer.toByteArray(), Charset.forName("UTF-8")));
+                    assertEquals(data2, new String(buffer.toByteArray(), StandardCharsets.UTF_8));
                     dataLatch.countDown();
                 }
             }
@@ -990,10 +991,10 @@ public class ServerHTTPSPDYTest extends AbstractHTTPSPDYTest
                 request.setHandled(true);
                 httpResponse.setHeader("Transfer-Encoding", "chunked");
                 ServletOutputStream output = httpResponse.getOutputStream();
-                output.write(pangram1.getBytes("UTF-8"));
+                output.write(pangram1.getBytes(StandardCharsets.UTF_8));
                 httpResponse.setHeader("EXTRA", "X");
                 output.flush();
-                output.write(pangram2.getBytes("UTF-8"));
+                output.write(pangram2.getBytes(StandardCharsets.UTF_8));
                 handlerLatch.countDown();
             }
         }), null);
@@ -1024,12 +1025,12 @@ public class ServerHTTPSPDYTest extends AbstractHTTPSPDYTest
                 if (count == 1)
                 {
                     Assert.assertFalse(dataInfo.isClose());
-                    assertEquals(pangram1, dataInfo.asString("UTF-8", true));
+                    assertEquals(pangram1, dataInfo.asString(StandardCharsets.UTF_8, true));
                 }
                 else if (count == 2)
                 {
                     assertTrue(dataInfo.isClose());
-                    assertEquals(pangram2, dataInfo.asString("UTF-8", true));
+                    assertEquals(pangram2, dataInfo.asString(StandardCharsets.UTF_8, true));
                 }
                 dataLatch.countDown();
             }

jetty-spdy/spdy-http-server/src/test/java/org/eclipse/jetty/spdy/server/proxy/ProxyHTTPToSPDYTest.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.spdy.server.proxy;
 
 import java.net.InetSocketAddress;
+import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.concurrent.CountDownLatch;
@@ -251,7 +252,7 @@ public class ProxyHTTPToSPDYTest
     @Test
     public void testGETThenSmallResponseContent() throws Exception
     {
-        final byte[] data = "0123456789ABCDEF".getBytes("UTF-8");
+        final byte[] data = "0123456789ABCDEF".getBytes(StandardCharsets.UTF_8);
         InetSocketAddress proxyAddress = startProxy(startServer(new ServerSessionFrameListener.Adapter()
         {
             @Override
@@ -328,7 +329,7 @@ public class ProxyHTTPToSPDYTest
     public void testPOSTWithSmallRequestContentThenSmallResponseContent() throws Exception
     {
         String dataString = "0123456789ABCDEF";
-        final byte[] data = dataString.getBytes("UTF-8");
+        final byte[] data = dataString.getBytes(StandardCharsets.UTF_8);
         InetSocketAddress proxyAddress = startProxy(startServer(new ServerSessionFrameListener.Adapter()
         {
             @Override
@@ -370,7 +371,7 @@ public class ProxyHTTPToSPDYTest
     @Test
     public void testGETThenSPDYPushIsIgnored() throws Exception
     {
-        final byte[] data = "0123456789ABCDEF".getBytes("UTF-8");
+        final byte[] data = "0123456789ABCDEF".getBytes(StandardCharsets.UTF_8);
         InetSocketAddress proxyAddress = startProxy(startServer(new ServerSessionFrameListener.Adapter()
         {
             @Override

jetty-spdy/spdy-http-server/src/test/java/org/eclipse/jetty/spdy/server/proxy/ProxySPDYToHTTPTest.java

@@ -22,6 +22,7 @@ import java.io.BufferedReader;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.net.InetSocketAddress;
+import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.concurrent.CountDownLatch;
@@ -197,7 +198,7 @@ public class ProxySPDYToHTTPTest
     @Test
     public void testSYNThenREPLYAndDATA() throws Exception
     {
-        final byte[] data = "0123456789ABCDEF".getBytes("UTF-8");
+        final byte[] data = "0123456789ABCDEF".getBytes(StandardCharsets.UTF_8);
         final String header = "foo";
 
         InetSocketAddress proxyAddress = startProxy(startServer(new TestServerHandler(header, data)), 30000, 30000);

jetty-spdy/spdy-http-server/src/test/java/org/eclipse/jetty/spdy/server/proxy/ProxySPDYToSPDYTest.java

@@ -20,6 +20,7 @@ package org.eclipse.jetty.spdy.server.proxy;
 
 import java.io.ByteArrayOutputStream;
 import java.net.InetSocketAddress;
+import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.concurrent.CountDownLatch;
@@ -227,7 +228,7 @@ public class ProxySPDYToSPDYTest
     @Test
     public void testSYNThenREPLYAndDATA() throws Exception
     {
-        final byte[] data = "0123456789ABCDEF".getBytes("UTF-8");
+        final byte[] data = "0123456789ABCDEF".getBytes(StandardCharsets.UTF_8);
         final String header = "foo";
         InetSocketAddress proxyAddress = startProxy(startServer(new ServerSessionFrameListener.Adapter()
         {
@@ -287,7 +288,7 @@ public class ProxySPDYToSPDYTest
     @Test
     public void testSYNThenSPDYPushIsReceived() throws Exception
     {
-        final byte[] data = "0123456789ABCDEF".getBytes("UTF-8");
+        final byte[] data = "0123456789ABCDEF".getBytes(StandardCharsets.UTF_8);
         InetSocketAddress proxyAddress = startProxy(startServer(new ServerSessionFrameListener.Adapter()
         {
             @Override
@@ -368,7 +369,7 @@ public class ProxySPDYToSPDYTest
     @Test
     public void testSYNThenSPDYNestedPushIsReceived() throws Exception
     {
-        final byte[] data = "0123456789ABCDEF".getBytes("UTF-8");
+        final byte[] data = "0123456789ABCDEF".getBytes(StandardCharsets.UTF_8);
         InetSocketAddress proxyAddress = startProxy(startServer(new ServerSessionFrameListener.Adapter()
         {
             @Override

jetty-spdy/spdy-server/src/test/java/org/eclipse/jetty/spdy/server/SynReplyTest.java

@@ -21,6 +21,7 @@ package org.eclipse.jetty.spdy.server;
 import java.io.ByteArrayOutputStream;
 import java.nio.ByteBuffer;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
@@ -118,7 +119,7 @@ public class SynReplyTest extends AbstractTest
     @Test
     public void testSynDataReply() throws Exception
     {
-        final byte[] dataBytes = "foo".getBytes(Charset.forName("UTF-8"));
+        final byte[] dataBytes = "foo".getBytes(StandardCharsets.UTF_8);
 
         final CountDownLatch synLatch = new CountDownLatch(1);
         final CountDownLatch dataLatch = new CountDownLatch(1);
@@ -235,13 +236,13 @@ public class SynReplyTest extends AbstractTest
                 int dataCount = this.dataCount.incrementAndGet();
                 if (dataCount == 1)
                 {
-                    String chunk1 = dataInfo.asString("UTF-8", true);
+                    String chunk1 = dataInfo.asString(StandardCharsets.UTF_8, true);
                     Assert.assertEquals(data1, chunk1);
                     dataLatch1.countDown();
                 }
                 else if (dataCount == 2)
                 {
-                    String chunk2 = dataInfo.asString("UTF-8", true);
+                    String chunk2 = dataInfo.asString(StandardCharsets.UTF_8, true);
                     Assert.assertEquals(data2, chunk2);
                     dataLatch2.countDown();
                 }
@@ -277,7 +278,7 @@ public class SynReplyTest extends AbstractTest
                     @Override
                     public void onData(Stream stream, DataInfo dataInfo)
                     {
-                        String data = dataInfo.asString("UTF-8", true);
+                        String data = dataInfo.asString(StandardCharsets.UTF_8, true);
                         Assert.assertEquals(clientData, data);
                         clientDataLatch.countDown();
                     }
@@ -311,7 +312,7 @@ public class SynReplyTest extends AbstractTest
                     public void onData(Stream stream, DataInfo dataInfo)
                     {
                         ByteBuffer buffer = dataInfo.asByteBuffer(false);
-                        String data = Charset.forName("UTF-8").decode(buffer).toString();
+                        String data = StandardCharsets.UTF_8.decode(buffer).toString();
                         Assert.assertEquals(serverData, data);
                         serverDataLatch.countDown();
                     }
@@ -361,7 +362,7 @@ public class SynReplyTest extends AbstractTest
             @Override
             public void onData(Stream stream, DataInfo dataInfo)
             {
-                String chunk = dataInfo.asString("UTF-8", true);
+                String chunk = dataInfo.asString(StandardCharsets.UTF_8, true);
                 Assert.assertEquals(data, chunk);
                 dataLatch.countDown();
             }

jetty-spring/src/main/java/org/eclipse/jetty/spring/SpringConfigurationProcessor.java

@@ -20,6 +20,7 @@
 package org.eclipse.jetty.spring;
 
 import java.net.URL;
+import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.Map;
 import java.util.ServiceLoader;
@@ -80,7 +81,7 @@ public class SpringConfigurationProcessor implements ConfigurationProcessor
                     : new ByteArrayResource(("" +
                     "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
                     "<!DOCTYPE beans PUBLIC \"-//SPRING//DTD BEAN//EN\" \"http://www.springframework.org/dtd/spring-beans.dtd\">" +
-                    config).getBytes("UTF-8"));
+                    config).getBytes(StandardCharsets.UTF_8));
 
             _beanFactory = new DefaultListableBeanFactory()
             {

jetty-util/src/main/java/org/eclipse/jetty/util/AbstractTrie.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.util;
 
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 
 
 /* ------------------------------------------------------------ */
@@ -72,7 +73,7 @@ public abstract class AbstractTrie<V> implements Trie<V>
     @Override
     public V getBest(byte[] b, int offset, int len)
     {
-        return getBest(new String(b,offset,len,StringUtil.__ISO_8859_1_CHARSET));
+        return getBest(new String(b,offset,len,StandardCharsets.ISO_8859_1));
     }
 
     @Override

jetty-util/src/main/java/org/eclipse/jetty/util/B64Code.java

@@ -21,6 +21,7 @@ package org.eclipse.jetty.util;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.nio.charset.UnsupportedCharsetException;
 
 
@@ -65,7 +66,7 @@ public class B64Code
      */
     public static String encode(String s)
     {
-        return encode(s,null);
+        return encode(s, (Charset)null);
     }
 
     /**
@@ -80,12 +81,25 @@ public class B64Code
     {
         byte[] bytes;
         if (charEncoding==null)
-            bytes=s.getBytes(Charset.forName(StringUtil.__ISO_8859_1));
+            bytes=s.getBytes(StandardCharsets.ISO_8859_1);
         else
             bytes=s.getBytes(Charset.forName(charEncoding));
         return new String(encode(bytes));
     }
 
+    /**
+     * Base 64 encode as described in RFC 1421.
+     * <p>Does not insert whitespace as described in RFC 1521.
+     * @param s String to encode.
+     * @param charEncoding The character encoding of the provided input String.
+     * @return String containing the encoded form of the input.
+     */
+    public static String encode(String s, Charset charEncoding)
+    {
+        byte[] bytes=s.getBytes(charEncoding==null ? StandardCharsets.ISO_8859_1 : charEncoding);
+        return new String(encode(bytes));
+    }
+
     /**
      * Fast Base 64 encode as described in RFC 1421.
      * <p>Does not insert whitespace as described in RFC 1521.
@@ -236,6 +250,24 @@ public class B64Code
         return new String(decoded,Charset.forName(charEncoding));
     }
 
+    /**
+     * Base 64 decode as described in RFC 2045.
+     * <p>Unlike {@link #decode(char[])}, extra whitespace is ignored.
+     * @param encoded String to decode.
+     * @param charEncoding Character encoding
+     *        used to map the decoded bytes into a String.
+     * @return String decoded byte array.
+     * @throws IllegalArgumentException if the input is not a valid
+     *         B64 encoding.
+     */
+    public static String decode(String encoded, Charset charEncoding)
+    {
+        byte[] decoded=decode(encoded);
+        if (charEncoding==null)
+            return new String(decoded);
+        return new String(decoded, charEncoding);
+    }
+
     /**
      * Fast Base 64 decode as described in RFC 1421.
      *

jetty-util/src/main/java/org/eclipse/jetty/util/BufferUtil.java

@@ -29,6 +29,7 @@ import java.nio.ByteBuffer;
 import java.nio.channels.FileChannel;
 import java.nio.channels.FileChannel.MapMode;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 
 
 /* ------------------------------------------------------------------------------- */
@@ -454,7 +455,7 @@ public class BufferUtil
      */
     public static String toString(ByteBuffer buffer)
     {
-        return toString(buffer, StringUtil.__ISO_8859_1_CHARSET);
+        return toString(buffer, StandardCharsets.ISO_8859_1);
     }
 
     /* ------------------------------------------------------------ */
@@ -464,7 +465,7 @@ public class BufferUtil
      */
     public static String toUTF8String(ByteBuffer buffer)
     {
-        return toString(buffer, StringUtil.__UTF8_CHARSET);
+        return toString(buffer, StandardCharsets.UTF_8);
     }
 
     /* ------------------------------------------------------------ */
@@ -733,12 +734,12 @@ public class BufferUtil
 
     public static ByteBuffer toBuffer(String s)
     {
-        return ByteBuffer.wrap(s.getBytes(StringUtil.__ISO_8859_1_CHARSET));
+        return ByteBuffer.wrap(s.getBytes(StandardCharsets.ISO_8859_1));
     }
 
     public static ByteBuffer toDirectBuffer(String s)
     {
-        byte[] bytes = s.getBytes(StringUtil.__ISO_8859_1_CHARSET);
+        byte[] bytes = s.getBytes(StandardCharsets.ISO_8859_1);
         ByteBuffer buf = ByteBuffer.allocateDirect(bytes.length);
         buf.put(bytes);
         buf.flip();

jetty-util/src/main/java/org/eclipse/jetty/util/ByteArrayISO8859Writer.java

@@ -21,6 +21,7 @@ import java.io.IOException;
 import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.io.Writer;
+import java.nio.charset.StandardCharsets;
 
 
 /* ------------------------------------------------------------ */
@@ -211,7 +212,7 @@ public class ByteArrayISO8859Writer extends Writer
         if (_bout==null)
         {
             _bout = new ByteArrayOutputStream2(2*length);
-            _writer = new OutputStreamWriter(_bout,StringUtil.__ISO_8859_1);
+            _writer = new OutputStreamWriter(_bout,StandardCharsets.ISO_8859_1);
         }
         else
             _bout.reset();

jetty-util/src/main/java/org/eclipse/jetty/util/IO.java

@@ -29,6 +29,7 @@ import java.io.PrintWriter;
 import java.io.Reader;
 import java.io.StringWriter;
 import java.io.Writer;
+import java.nio.charset.Charset;
 
 import org.eclipse.jetty.util.log.Log;
 import org.eclipse.jetty.util.log.Logger;
@@ -311,7 +312,7 @@ public class IO
     public static String toString(InputStream in)
         throws IOException
     {
-        return toString(in,null);
+        return toString(in,(Charset)null);
     }
     
     /* ------------------------------------------------------------ */
@@ -319,14 +320,22 @@ public class IO
      */
     public static String toString(InputStream in,String encoding)
         throws IOException
+    {
+        return toString(in, encoding==null?null:Charset.forName(encoding));
+    }
+
+    /** Read input stream to string.
+     */
+    public static String toString(InputStream in, Charset encoding)
+            throws IOException
     {
         StringWriter writer=new StringWriter();
         InputStreamReader reader = encoding==null?new InputStreamReader(in):new InputStreamReader(in,encoding);
-        
+
         copy(reader,writer);
         return writer.toString();
     }
-    
+
     /* ------------------------------------------------------------ */
     /** Read input stream to string.
      */

jetty-util/src/main/java/org/eclipse/jetty/util/MultiPartInputStreamParser.java

@@ -29,6 +29,7 @@ import java.io.FilterInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -475,7 +476,7 @@ public class MultiPartInputStreamParser
         }
         
         String boundary="--"+contentTypeBoundary;
-        byte[] byteBoundary=(boundary+"--").getBytes(StringUtil.__ISO_8859_1);
+        byte[] byteBoundary=(boundary+"--").getBytes(StandardCharsets.ISO_8859_1);
 
         // Get first boundary
         String line = null;

jetty-util/src/main/java/org/eclipse/jetty/util/MultiPartOutputStream.java

@@ -21,6 +21,7 @@ package org.eclipse.jetty.util;
 import java.io.FilterOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
+import java.nio.charset.StandardCharsets;
 
 
 /* ================================================================ */
@@ -53,7 +54,7 @@ public class MultiPartOutputStream extends FilterOutputStream
 
         boundary = "jetty"+System.identityHashCode(this)+
         Long.toString(System.currentTimeMillis(),36);
-        boundaryBytes=boundary.getBytes(StringUtil.__ISO_8859_1);
+        boundaryBytes=boundary.getBytes(StandardCharsets.ISO_8859_1);
     }
 
     public MultiPartOutputStream(OutputStream out, String boundary)
@@ -62,7 +63,7 @@ public class MultiPartOutputStream extends FilterOutputStream
         super(out);
 
         this.boundary = boundary;
-        boundaryBytes=boundary.getBytes(StringUtil.__ISO_8859_1);
+        boundaryBytes=boundary.getBytes(StandardCharsets.ISO_8859_1);
     }
 
     /* ------------------------------------------------------------ */
@@ -110,7 +111,7 @@ public class MultiPartOutputStream extends FilterOutputStream
         out.write(boundaryBytes);
         out.write(__CRLF);
         if (contentType != null)
-            out.write(("Content-Type: "+contentType).getBytes(StringUtil.__ISO_8859_1));
+            out.write(("Content-Type: "+contentType).getBytes(StandardCharsets.ISO_8859_1));
         out.write(__CRLF);
         out.write(__CRLF);
     }
@@ -128,11 +129,11 @@ public class MultiPartOutputStream extends FilterOutputStream
         out.write(boundaryBytes);
         out.write(__CRLF);
         if (contentType != null)
-            out.write(("Content-Type: "+contentType).getBytes(StringUtil.__ISO_8859_1));
+            out.write(("Content-Type: "+contentType).getBytes(StandardCharsets.ISO_8859_1));
         out.write(__CRLF);
         for (int i=0;headers!=null && i<headers.length;i++)
         {
-            out.write(headers[i].getBytes(StringUtil.__ISO_8859_1));
+            out.write(headers[i].getBytes(StandardCharsets.ISO_8859_1));
             out.write(__CRLF);
         }
         out.write(__CRLF);

jetty-util/src/main/java/org/eclipse/jetty/util/ReadLineInputStream.java

@@ -21,6 +21,7 @@ package org.eclipse.jetty.util;
 import java.io.BufferedInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
 
 /**
  * ReadLineInputStream
@@ -58,7 +59,7 @@ public class ReadLineInputStream extends BufferedInputStream
                 int m=markpos;
                 markpos=-1;
                 if (pos>m)
-                    return new String(buf,m,pos-m,StringUtil.__UTF8_CHARSET);
+                    return new String(buf,m,pos-m, StandardCharsets.UTF_8);
 
                 return null;
             }
@@ -77,7 +78,7 @@ public class ReadLineInputStream extends BufferedInputStream
                     _skipLF=true;
                 int m=markpos;
                 markpos=-1;
-                return new String(buf,m,p-m-1,StringUtil.__UTF8_CHARSET);
+                return new String(buf,m,p-m-1,StandardCharsets.UTF_8);
             }
             
             if (b=='\n')
@@ -91,7 +92,7 @@ public class ReadLineInputStream extends BufferedInputStream
                 }
                 int m=markpos;
                 markpos=-1;
-                return new String(buf,m,pos-m-1,StringUtil.__UTF8_CHARSET);
+                return new String(buf,m,pos-m-1,StandardCharsets.UTF_8);
             }
         }
     }

jetty-util/src/main/java/org/eclipse/jetty/util/StringUtil.java

@@ -21,13 +21,14 @@ package org.eclipse.jetty.util;
 import java.io.UnsupportedEncodingException;
 import java.nio.ByteBuffer;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 
 import org.eclipse.jetty.util.log.Log;
 import org.eclipse.jetty.util.log.Logger;
 
 /** Fast String Utilities.
  *
- * These string utilities provide both conveniance methods and
+ * These string utilities provide both convenience methods and
  * performance improvements over most standard library versions. The
  * main aim of the optimizations is to avoid object creation unless
  * absolutely required.
@@ -49,19 +50,30 @@ public class StringUtil
     public static final String __ISO_8859_1="ISO-8859-1";
     public final static String __UTF8="UTF-8";
     public final static String __UTF16="UTF-16";
-    
-    public final static Charset __UTF8_CHARSET;
-    public final static Charset __ISO_8859_1_CHARSET;
-    public final static Charset __UTF16_CHARSET;
-    public final static Charset __US_ASCII_CHARSET;
+
+    /**
+     * @deprecated Use {@link StandardCharsets#UTF_8}
+     */
+    @Deprecated
+    public final static Charset __UTF8_CHARSET=StandardCharsets.UTF_8;
+    /**
+     * @deprecated Use {@link StandardCharsets#ISO_8859_1}
+     */
+    @Deprecated
+    public final static Charset __ISO_8859_1_CHARSET=StandardCharsets.ISO_8859_1;
+    /**
+     * @deprecated Use {@link StandardCharsets#UTF_16}
+     */
+    @Deprecated
+    public final static Charset __UTF16_CHARSET=StandardCharsets.UTF_16;
+    /**
+     * @deprecated Use {@link StandardCharsets#US_ASCII}
+     */
+    @Deprecated
+    public final static Charset __US_ASCII_CHARSET=StandardCharsets.US_ASCII;
     
     static
     {
-        __UTF8_CHARSET=Charset.forName(__UTF8);
-        __ISO_8859_1_CHARSET=Charset.forName(__ISO_8859_1);
-        __UTF16_CHARSET=Charset.forName(__UTF16);
-        __US_ASCII_CHARSET=Charset.forName("US-ASCII");
-        
         CHARSETS.put("UTF-8",__UTF8);
         CHARSETS.put("UTF8",__UTF8);
         CHARSETS.put("UTF-16",__UTF16);
@@ -343,7 +355,7 @@ public class StringUtil
     /* ------------------------------------------------------------ */
     public static String toUTF8String(byte[] b,int offset,int length)
     {
-        return new String(b,offset,length,__UTF8_CHARSET);
+        return new String(b,offset,length,StandardCharsets.UTF_8);
     }
 
     /* ------------------------------------------------------------ */
@@ -481,12 +493,12 @@ public class StringUtil
     
     public static byte[] getBytes(String s)
     {
-        return s.getBytes(__ISO_8859_1_CHARSET);
+        return s.getBytes(StandardCharsets.ISO_8859_1);
     }
     
     public static byte[] getUtf8Bytes(String s)
     {
-        return s.getBytes(__UTF8_CHARSET);
+        return s.getBytes(StandardCharsets.UTF_8);
     }
     
     public static byte[] getBytes(String s,String charset)

jetty-util/src/main/java/org/eclipse/jetty/util/TreeTrie.java

@@ -20,6 +20,7 @@ package org.eclipse.jetty.util;
 
 import java.io.IOException;
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
@@ -215,7 +216,7 @@ public class TreeTrie<V> extends AbstractTrie<V>
     public V getBest(String s, int offset, int len)
     {
         // TODO inefficient
-        byte[] b=s.substring(offset,offset+len).getBytes(StringUtil.__ISO_8859_1_CHARSET);
+        byte[] b=s.substring(offset,offset+len).getBytes(StandardCharsets.ISO_8859_1);
         return getBest(b,0,b.length);
     }
     

jetty-util/src/main/java/org/eclipse/jetty/util/URIUtil.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.util;
 
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 
 
 
@@ -43,8 +44,14 @@ public class URIUtil
     public static final String HTTPS_COLON="https:";
 
     // Use UTF-8 as per http://www.w3.org/TR/html40/appendix/notes.html#non-ascii-chars
-    public static final Charset __CHARSET=Charset.forName(System.getProperty("org.eclipse.jetty.util.URI.charset",StringUtil.__UTF8));
-    
+    public static final Charset __CHARSET;
+
+    static
+    {
+        String charset = System.getProperty("org.eclipse.jetty.util.URI.charset");
+        __CHARSET = charset == null ? StandardCharsets.UTF_8 : Charset.forName(charset);
+    }
+
     private URIUtil()
     {}
     

jetty-util/src/main/java/org/eclipse/jetty/util/UrlEncoded.java

@@ -25,6 +25,7 @@ import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.StringWriter;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.List;
 import java.util.Map;
 
@@ -59,15 +60,16 @@ public class UrlEncoded extends MultiMap<String> implements Cloneable
     public static final Charset ENCODING;
     static
     {
-        Charset encoding=null;
+        Charset encoding;
         try
         {
-            encoding=Charset.forName(System.getProperty("org.eclipse.jetty.util.UrlEncoding.charset",StringUtil.__UTF8));
+            String charset = System.getProperty("org.eclipse.jetty.util.UrlEncoding.charset");
+            encoding = charset == null ? StandardCharsets.UTF_8 : Charset.forName(charset);
         }
         catch(Exception e)
         {
             LOG.warn(e);
-            encoding=StringUtil.__UTF8_CHARSET;
+            encoding=StandardCharsets.UTF_8;
         }
         ENCODING=encoding;
     }
@@ -269,7 +271,6 @@ public class UrlEncoded extends MultiMap<String> implements Cloneable
      * @param offset the offset within raw to decode from
      * @param length the length of the section to decode
      * @param map the {@link MultiMap} to populate
-     * @param buffer the buffer to decode into
      */
     public static void decodeUtf8To(byte[] raw,int offset, int length, MultiMap<String> map)
     {
@@ -594,11 +595,11 @@ public class UrlEncoded extends MultiMap<String> implements Cloneable
     /* -------------------------------------------------------------- */
     public static void decodeUtf16To(InputStream in, MultiMap<String> map, int maxLength, int maxKeys) throws IOException
     {
-        InputStreamReader input = new InputStreamReader(in,StringUtil.__UTF16);
+        InputStreamReader input = new InputStreamReader(in,StandardCharsets.UTF_16);
         StringWriter buf = new StringWriter(8192);
         IO.copy(input,buf,maxLength);
         
-        decodeTo(buf.getBuffer().toString(),map,StringUtil.__UTF16,maxKeys);
+        decodeTo(buf.getBuffer().toString(),map,StandardCharsets.UTF_16,maxKeys);
     }
 
     /* -------------------------------------------------------------- */
@@ -610,7 +611,7 @@ public class UrlEncoded extends MultiMap<String> implements Cloneable
     {
         if (charset==null)
         {
-            if (ENCODING==StringUtil.__UTF8_CHARSET)
+            if (ENCODING.equals(StandardCharsets.UTF_8))
                 decodeUtf8To(in,map,maxLength,maxKeys);
             else
                 decodeTo(in,map,ENCODING,maxLength,maxKeys);
@@ -636,19 +637,19 @@ public class UrlEncoded extends MultiMap<String> implements Cloneable
         if (charset==null) 
            charset=ENCODING;
             
-        if (StringUtil.__UTF8_CHARSET.equals(charset))
+        if (StandardCharsets.UTF_8.equals(charset))
         {
             decodeUtf8To(in,map,maxLength,maxKeys);
             return;
         }
         
-        if (StringUtil.__ISO_8859_1_CHARSET.equals(charset))
+        if (StandardCharsets.ISO_8859_1.equals(charset))
         {
             decode88591To(in,map,maxLength,maxKeys);
             return;
         }
 
-        if (StringUtil.__UTF16_CHARSET.equals(charset)) // Should be all 2 byte encodings
+        if (StandardCharsets.UTF_16.equals(charset)) // Should be all 2 byte encodings
         {
             decodeUtf16To(in,map,maxLength,maxKeys);
             return;
@@ -753,7 +754,7 @@ public class UrlEncoded extends MultiMap<String> implements Cloneable
      */
     public static String decodeString(String encoded,int offset,int length,Charset charset)
     {
-        if (charset==null || StringUtil.__UTF8_CHARSET.equals(charset))
+        if (charset==null || StandardCharsets.UTF_8.equals(charset))
         {
             Utf8StringBuffer buffer=null;
 

jetty-util/src/main/java/org/eclipse/jetty/util/security/Credential.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.util.security;
 
 import java.io.Serializable;
+import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
 
 import org.eclipse.jetty.util.StringUtil;
@@ -156,7 +157,7 @@ public abstract class Credential implements Serializable
                     {
                         if (__md == null) __md = MessageDigest.getInstance("MD5");
                         __md.reset();
-                        __md.update(credentials.toString().getBytes(StringUtil.__ISO_8859_1));
+                        __md.update(credentials.toString().getBytes(StandardCharsets.ISO_8859_1));
                         digest = __md.digest();
                     }
                     if (digest == null || digest.length != _digest.length) return false;
@@ -213,7 +214,7 @@ public abstract class Credential implements Serializable
                     }
 
                     __md.reset();
-                    __md.update(password.getBytes(StringUtil.__ISO_8859_1));
+                    __md.update(password.getBytes(StandardCharsets.ISO_8859_1));
                     digest = __md.digest();
                 }
 

jetty-util/src/test/java/org/eclipse/jetty/util/B64CodeTest.java

@@ -23,6 +23,8 @@ import junit.framework.Assert;
 
 import org.junit.Test;
 
+import java.nio.charset.StandardCharsets;
+
 public class B64CodeTest
 {
     String text = "Man is distinguished, not only by his reason, but by this singular passion from other animals, which is a lust of the mind, that by a perseverance of delight in the continued and indefatigable generation of knowledge, exceeds the short vehemence of any carnal pleasure.";
@@ -30,14 +32,14 @@ public class B64CodeTest
     @Test
     public void testRFC1421() throws Exception
     {
-        String b64 = B64Code.encode(text,StringUtil.__ISO_8859_1);
+        String b64 = B64Code.encode(text, StandardCharsets.ISO_8859_1);
         Assert.assertEquals("TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlz"+
                 "IHNpbmd1bGFyIHBhc3Npb24gZnJvbSBvdGhlciBhbmltYWxzLCB3aGljaCBpcyBhIGx1c3Qgb2Yg"+
                 "dGhlIG1pbmQsIHRoYXQgYnkgYSBwZXJzZXZlcmFuY2Ugb2YgZGVsaWdodCBpbiB0aGUgY29udGlu"+
                 "dWVkIGFuZCBpbmRlZmF0aWdhYmxlIGdlbmVyYXRpb24gb2Yga25vd2xlZGdlLCBleGNlZWRzIHRo"+
                 "ZSBzaG9ydCB2ZWhlbWVuY2Ugb2YgYW55IGNhcm5hbCBwbGVhc3VyZS4=",b64);
         
-        char[] chars = B64Code.encode(text.getBytes(StringUtil.__ISO_8859_1),false);
+        char[] chars = B64Code.encode(text.getBytes(StandardCharsets.ISO_8859_1),false);
         b64 = new String(chars,0,chars.length);
         Assert.assertEquals("TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlz"+
                 "IHNpbmd1bGFyIHBhc3Npb24gZnJvbSBvdGhlciBhbmltYWxzLCB3aGljaCBpcyBhIGx1c3Qgb2Yg"+
@@ -50,7 +52,7 @@ public class B64CodeTest
     @Test
     public void testRFC2045() throws Exception
     {
-        char[] chars = B64Code.encode(text.getBytes(StringUtil.__ISO_8859_1),true);
+        char[] chars = B64Code.encode(text.getBytes(StandardCharsets.ISO_8859_1),true);
         String b64 = new String(chars,0,chars.length);
         Assert.assertEquals("TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlz\r\n"+
                 "IHNpbmd1bGFyIHBhc3Npb24gZnJvbSBvdGhlciBhbmltYWxzLCB3aGljaCBpcyBhIGx1c3Qgb2Yg\r\n"+
@@ -64,7 +66,7 @@ public class B64CodeTest
     @Test
     public void testInteger() throws Exception
     {
-        byte[] bytes = text.getBytes(StringUtil.__ISO_8859_1);
+        byte[] bytes = text.getBytes(StandardCharsets.ISO_8859_1);
         int value=(bytes[0]<<24)+(bytes[1]<<16)+(bytes[2]<<8)+(bytes[3]);
         
         StringBuilder b = new StringBuilder();
@@ -74,7 +76,7 @@ public class B64CodeTest
     @Test
     public void testLong() throws Exception
     {
-        byte[] bytes = text.getBytes(StringUtil.__ISO_8859_1);
+        byte[] bytes = text.getBytes(StandardCharsets.ISO_8859_1);
         long value=((0xffL&bytes[0])<<56)+((0xffL&bytes[1])<<48)+((0xffL&bytes[2])<<40)+((0xffL&bytes[3])<<32)+
                 ((0xffL&bytes[4])<<24)+((0xffL&bytes[5])<<16)+((0xffL&bytes[6])<<8)+(0xffL&bytes[7]);
         

jetty-util/src/test/java/org/eclipse/jetty/util/ReadLineInputStreamTest.java

@@ -21,6 +21,7 @@ package org.eclipse.jetty.util;
 import java.io.OutputStream;
 import java.io.PipedInputStream;
 import java.io.PipedOutputStream;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.TimeUnit;
 
 import org.junit.After;
@@ -60,7 +61,7 @@ public class ReadLineInputStreamTest
                                 _pout.close();
                             else
                             {
-                                _pout.write(s.getBytes(StringUtil.__UTF8_CHARSET));
+                                _pout.write(s.getBytes(StandardCharsets.UTF_8));
                                 Thread.sleep(50);
                             }
                         }
@@ -196,7 +197,7 @@ public class ReadLineInputStreamTest
 
         byte[] body = new byte[6];
         _in.read(body);
-        Assert.assertEquals("\nBody\n",new String(body,0,6,StringUtil.__UTF8));
+        Assert.assertEquals("\nBody\n",new String(body,0,6,StandardCharsets.UTF_8));
         
         Assert.assertEquals("",_in.readLine());
         Assert.assertEquals(null,_in.readLine());
@@ -216,7 +217,7 @@ public class ReadLineInputStreamTest
 
         byte[] body = new byte[6];
         _in.read(body);
-        Assert.assertEquals("\nBody\n",new String(body,0,6,StringUtil.__UTF8));
+        Assert.assertEquals("\nBody\n",new String(body,0,6,StandardCharsets.UTF_8));
         
         Assert.assertEquals("",_in.readLine());
         Assert.assertEquals(null,_in.readLine());
@@ -236,7 +237,7 @@ public class ReadLineInputStreamTest
 
         byte[] body = new byte[6];
         _in.read(body);
-        Assert.assertEquals("\nBody\n",new String(body,0,6,StringUtil.__UTF8));
+        Assert.assertEquals("\nBody\n",new String(body,0,6,StandardCharsets.UTF_8));
         
         Assert.assertEquals("",_in.readLine());
         Assert.assertEquals(null,_in.readLine());

jetty-util/src/test/java/org/eclipse/jetty/util/StringUtilTest.java

@@ -25,6 +25,8 @@ import static org.junit.Assert.assertTrue;
 import org.junit.Assert;
 import org.junit.Test;
 
+import java.nio.charset.StandardCharsets;
+
 public class StringUtilTest
 {
     @Test
@@ -160,7 +162,7 @@ public class StringUtilTest
     {
         String string = "Now \u0690xxxxxxxx";
         System.err.println(string);
-        byte[] bytes=string.getBytes("UTF-8");
+        byte[] bytes=string.getBytes(StandardCharsets.UTF_8);
         System.err.println(new String(bytes));
         System.err.println(bytes.length);
         long calc=0;
@@ -170,7 +172,7 @@ public class StringUtilTest
             long s1=System.currentTimeMillis();
             for (int j=1000000; j-->0;)
             {
-                calc+=new String(bytes,0,bytes.length,"UTF-8").hashCode();
+                calc+=new String(bytes,0,bytes.length,StandardCharsets.UTF_8).hashCode();
             }
             long s2=System.currentTimeMillis();
             for (int j=1000000; j-->0;)

jetty-util/src/test/java/org/eclipse/jetty/util/URITest.java

@@ -21,6 +21,7 @@ package org.eclipse.jetty.util;
 import static org.junit.Assert.assertEquals;
 
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 
 import org.junit.Test;
 
@@ -65,7 +66,7 @@ public class URITest
         
         // Test for null character (real world ugly test case)
         byte oddBytes[] = { '/', 0x00, '/' };
-        String odd = new String(oddBytes, Charset.forName("ISO-8859-1"));
+        String odd = new String(oddBytes, StandardCharsets.ISO_8859_1);
         assertEquals(odd,URIUtil.decodePath("/%00/"));
     }
 

jetty-util/src/test/java/org/eclipse/jetty/util/URLEncodedTest.java

@@ -23,6 +23,7 @@ import static org.junit.Assert.assertTrue;
 
 import java.io.ByteArrayInputStream;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 
 import org.junit.Assert;
 import org.junit.Test;
@@ -121,22 +122,22 @@ public class URLEncodedTest
         assertEquals("encoded get", url_encoded.getString("Name8"),"xx,  yy  ,zz");
 
         url_encoded.clear();
-        url_encoded.decode("Name11=%u30EDxxVerdi+%C6+og+2zz", StringUtil.__ISO_8859_1_CHARSET);
+        url_encoded.decode("Name11=%u30EDxxVerdi+%C6+og+2zz", StandardCharsets.ISO_8859_1);
         assertEquals("encoded param size",1, url_encoded.size());
         assertEquals("encoded get", "?xxVerdi \u00c6 og 2zz",url_encoded.getString("Name11"));
 
         url_encoded.clear();
-        url_encoded.decode("Name12=%u30EDxxVerdi+%2F+og+2zz", StringUtil.__UTF8_CHARSET);
+        url_encoded.decode("Name12=%u30EDxxVerdi+%2F+og+2zz", StandardCharsets.UTF_8);
         assertEquals("encoded param size",1, url_encoded.size());
         assertEquals("encoded get", url_encoded.getString("Name12"),"\u30edxxVerdi / og 2zz");
 
         url_encoded.clear();
-        url_encoded.decode("Name14=%uXXXXa%GGb%+%c%+%d", StringUtil.__ISO_8859_1_CHARSET);
+        url_encoded.decode("Name14=%uXXXXa%GGb%+%c%+%d", StandardCharsets.ISO_8859_1);
         assertEquals("encoded param size",1, url_encoded.size());
         assertEquals("encoded get","?a?b?c?d", url_encoded.getString("Name14"));
 
         url_encoded.clear();
-        url_encoded.decode("Name14=%uXXXX%GG%+%%+%", StringUtil.__UTF8_CHARSET);
+        url_encoded.decode("Name14=%uXXXX%GG%+%%+%", StandardCharsets.UTF_8);
         assertEquals("encoded param size",1, url_encoded.size());
         assertEquals("encoded get", "\ufffd\ufffd\ufffd\ufffd",url_encoded.getString("Name14"));
 
@@ -160,38 +161,38 @@ public class URLEncodedTest
     public void testBadEncoding()
     {
         UrlEncoded url_encoded = new UrlEncoded();
-        url_encoded.decode("Name15=xx%zzyy", StringUtil.__UTF8_CHARSET);
+        url_encoded.decode("Name15=xx%zzyy", StandardCharsets.UTF_8);
         assertEquals("encoded param size",1, url_encoded.size());
         assertEquals("encoded get", "xx\ufffdyy", url_encoded.getString("Name15"));
 
-        byte[] bad="Name=%FF%FF%FF".getBytes(StringUtil.__UTF8_CHARSET);
+        byte[] bad="Name=%FF%FF%FF".getBytes(StandardCharsets.UTF_8);
         MultiMap<String> map = new MultiMap<String>();
         UrlEncoded.decodeUtf8To(bad,0,bad.length,map);
         assertEquals("encoded param size",1, map.size());
         assertEquals("encoded get", "\ufffd\ufffd\ufffd", map.getString("Name"));
         
         url_encoded.clear();
-        url_encoded.decode("Name=%FF%FF%FF", StringUtil.__UTF8_CHARSET);
+        url_encoded.decode("Name=%FF%FF%FF", StandardCharsets.UTF_8);
         assertEquals("encoded param size",1, url_encoded.size());
         assertEquals("encoded get", "\ufffd\ufffd\ufffd", url_encoded.getString("Name"));
         
         url_encoded.clear();
-        url_encoded.decode("Name=%EF%EF%EF", StringUtil.__UTF8_CHARSET);
+        url_encoded.decode("Name=%EF%EF%EF", StandardCharsets.UTF_8);
         assertEquals("encoded param size",1, url_encoded.size());
         assertEquals("encoded get", "\ufffd\ufffd", url_encoded.getString("Name"));
 
-        assertEquals("x",UrlEncoded.decodeString("x",0,1,StringUtil.__UTF8_CHARSET));
-        assertEquals("x\ufffd",UrlEncoded.decodeString("x%",0,2,StringUtil.__UTF8_CHARSET));
-        assertEquals("x\ufffd",UrlEncoded.decodeString("x%2",0,3,StringUtil.__UTF8_CHARSET));
-        assertEquals("x ",UrlEncoded.decodeString("x%20",0,4,StringUtil.__UTF8_CHARSET));
+        assertEquals("x",UrlEncoded.decodeString("x",0,1,StandardCharsets.UTF_8));
+        assertEquals("x\ufffd",UrlEncoded.decodeString("x%",0,2,StandardCharsets.UTF_8));
+        assertEquals("x\ufffd",UrlEncoded.decodeString("x%2",0,3,StandardCharsets.UTF_8));
+        assertEquals("x ",UrlEncoded.decodeString("x%20",0,4,StandardCharsets.UTF_8));
 
-        assertEquals("xxx",UrlEncoded.decodeString("xxx",0,3,StringUtil.__UTF8_CHARSET));
-        assertEquals("xxx\ufffd",UrlEncoded.decodeString("xxx%",0,4,StringUtil.__UTF8_CHARSET));
-        assertEquals("xxx\ufffd",UrlEncoded.decodeString("xxx%u",0,5,StringUtil.__UTF8_CHARSET));
-        assertEquals("xxx\ufffd",UrlEncoded.decodeString("xxx%u1",0,6,StringUtil.__UTF8_CHARSET));
-        assertEquals("xxx\ufffd",UrlEncoded.decodeString("xxx%u12",0,7,StringUtil.__UTF8_CHARSET));
-        assertEquals("xxx\ufffd",UrlEncoded.decodeString("xxx%u123",0,8,StringUtil.__UTF8_CHARSET));
-        assertEquals("xxx\u1234",UrlEncoded.decodeString("xxx%u1234",0,9,StringUtil.__UTF8_CHARSET));
+        assertEquals("xxx",UrlEncoded.decodeString("xxx",0,3,StandardCharsets.UTF_8));
+        assertEquals("xxx\ufffd",UrlEncoded.decodeString("xxx%",0,4,StandardCharsets.UTF_8));
+        assertEquals("xxx\ufffd",UrlEncoded.decodeString("xxx%u",0,5,StandardCharsets.UTF_8));
+        assertEquals("xxx\ufffd",UrlEncoded.decodeString("xxx%u1",0,6,StandardCharsets.UTF_8));
+        assertEquals("xxx\ufffd",UrlEncoded.decodeString("xxx%u12",0,7,StandardCharsets.UTF_8));
+        assertEquals("xxx\ufffd",UrlEncoded.decodeString("xxx%u123",0,8,StandardCharsets.UTF_8));
+        assertEquals("xxx\u1234",UrlEncoded.decodeString("xxx%u1234",0,9,StandardCharsets.UTF_8));
     }
 
 
@@ -224,7 +225,7 @@ public class URLEncodedTest
 
         if (java.nio.charset.Charset.isSupported("Shift_JIS"))
         {
-            ByteArrayInputStream in2 = new ByteArrayInputStream ("name=%83e%83X%83g".getBytes(StringUtil.__ISO_8859_1));
+            ByteArrayInputStream in2 = new ByteArrayInputStream("name=%83e%83X%83g".getBytes(StandardCharsets.ISO_8859_1));
             MultiMap<String> m2 = new MultiMap<>();
             UrlEncoded.decodeTo(in2, m2, Charset.forName("Shift_JIS"), -1,-1);
             assertEquals("stream length",1,m2.size());
@@ -278,12 +279,12 @@ public class URLEncodedTest
 
         MultiMap<String> map = new MultiMap<>();
         UrlEncoded.LOG.info("EXPECT 4 Not Valid UTF8 warnings...");
-        UrlEncoded.decodeUtf8To(query.getBytes(StringUtil.__ISO_8859_1),0,query.length(),map);
+        UrlEncoded.decodeUtf8To(query.getBytes(StandardCharsets.ISO_8859_1),0,query.length(),map);
         assertEquals("X"+Utf8Appendable.REPLACEMENT+Utf8Appendable.REPLACEMENT+"Z",map.getValue("name",0));
 
         map.clear();
 
-        UrlEncoded.decodeUtf8To(new ByteArrayInputStream(query.getBytes(StringUtil.__ISO_8859_1)),map,100,2);
+        UrlEncoded.decodeUtf8To(new ByteArrayInputStream(query.getBytes(StandardCharsets.ISO_8859_1)),map,100,2);
         assertEquals("X"+Utf8Appendable.REPLACEMENT+Utf8Appendable.REPLACEMENT+"Z",map.getValue("name",0));
     }
 }

jetty-util/src/test/java/org/eclipse/jetty/util/Utf8LineParserTest.java

@@ -32,7 +32,7 @@ public class Utf8LineParserTest
 {
     private void appendUtf8(ByteBuffer buf, String line)
     {
-        buf.put(ByteBuffer.wrap(StringUtil.getBytes(line,StringUtil.__UTF8)));
+        buf.put(ByteBuffer.wrap(StringUtil.getUtf8Bytes(line)));
     }
 
     private void assertEquals(List<String> expected, List<String> actual)

jetty-util/src/test/java/org/eclipse/jetty/util/Utf8StringBufferTest.java

@@ -22,6 +22,7 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
 import java.io.UnsupportedEncodingException;
+import java.nio.charset.StandardCharsets;
 
 import org.junit.Test;
 
@@ -31,7 +32,7 @@ public class Utf8StringBufferTest
     public void testUtfStringBuffer() throws Exception
     {
         String source = "abcd012345\n\r\u0000\u00a4\u10fb\ufffdjetty";
-        byte[] bytes = source.getBytes(StringUtil.__UTF8);
+        byte[] bytes = source.getBytes(StandardCharsets.UTF_8);
         Utf8StringBuffer buffer = new Utf8StringBuffer();
         for (byte aByte : bytes)
             buffer.append(aByte);
@@ -43,7 +44,7 @@ public class Utf8StringBufferTest
     public void testUtf8WithMissingByte() throws Exception
     {
         String source = "abc\u10fb";
-        byte[] bytes = source.getBytes(StringUtil.__UTF8);
+        byte[] bytes = source.getBytes(StandardCharsets.UTF_8);
         Utf8StringBuffer buffer = new Utf8StringBuffer();
         for (int i = 0; i < bytes.length - 1; i++)
             buffer.append(bytes[i]);
@@ -54,7 +55,7 @@ public class Utf8StringBufferTest
     public void testUtf8WithAdditionalByte() throws Exception
     {
         String source = "abcXX";
-        byte[] bytes = source.getBytes(StringUtil.__UTF8);
+        byte[] bytes = source.getBytes(StandardCharsets.UTF_8);
         bytes[3] = (byte)0xc0;
         bytes[4] = (byte)0x00;
 
@@ -68,9 +69,9 @@ public class Utf8StringBufferTest
     public void testUTF32codes() throws Exception
     {
         String source = "\uD842\uDF9F";
-        byte[] bytes = source.getBytes("UTF-8");
+        byte[] bytes = source.getBytes(StandardCharsets.UTF_8);
 
-        String jvmcheck = new String(bytes,0,bytes.length,"UTF-8");
+        String jvmcheck = new String(bytes,0,bytes.length,StandardCharsets.UTF_8);
         assertEquals(source,jvmcheck);
 
         Utf8StringBuffer buffer = new Utf8StringBuffer();

jetty-util/src/test/java/org/eclipse/jetty/util/Utf8StringBuilderTest.java

@@ -24,6 +24,8 @@ import static org.junit.Assert.assertTrue;
 import org.junit.Assert;
 import org.junit.Test;
 
+import java.nio.charset.StandardCharsets;
+
 public class Utf8StringBuilderTest
 {
     @Test
@@ -76,7 +78,7 @@ public class Utf8StringBuilderTest
     public void testUtfStringBuilder() throws Exception
     {
         String source = "abcd012345\n\r\u0000\u00a4\u10fb\ufffdjetty";
-        byte[] bytes = source.getBytes(StringUtil.__UTF8);
+        byte[] bytes = source.getBytes(StandardCharsets.UTF_8);
         Utf8StringBuilder buffer = new Utf8StringBuilder();
         for (byte aByte : bytes)
             buffer.append(aByte);
@@ -88,7 +90,7 @@ public class Utf8StringBuilderTest
     public void testShort() throws Exception
     {
         String source = "abc\u10fb";
-        byte[] bytes = source.getBytes(StringUtil.__UTF8);
+        byte[] bytes = source.getBytes(StandardCharsets.UTF_8);
         Utf8StringBuilder buffer = new Utf8StringBuilder();
         for (int i = 0; i < bytes.length - 1; i++)
             buffer.append(bytes[i]);
@@ -99,7 +101,7 @@ public class Utf8StringBuilderTest
     public void testLong() throws Exception
     {
         String source = "abcXX";
-        byte[] bytes = source.getBytes(StringUtil.__UTF8);
+        byte[] bytes = source.getBytes(StandardCharsets.UTF_8);
         bytes[3] = (byte)0xc0;
         bytes[4] = (byte)0x00;
 
@@ -122,9 +124,9 @@ public class Utf8StringBuilderTest
     public void testUTF32codes() throws Exception
     {
         String source = "\uD842\uDF9F";
-        byte[] bytes = source.getBytes("UTF-8");
+        byte[] bytes = source.getBytes(StandardCharsets.UTF_8);
 
-        String jvmcheck = new String(bytes,0,bytes.length,"UTF-8");
+        String jvmcheck = new String(bytes,0,bytes.length,StandardCharsets.UTF_8);
         assertEquals(source,jvmcheck);
 
         Utf8StringBuilder buffer = new Utf8StringBuilder();