BAEL-255: Added encode-decode of url

core-java-8/src/test/java/com/baeldung/encoderdecoder/EncoderDecoder.java

@@ -0,0 +1,38 @@
+package com.baeldung.encoderdecoder;
+
+import org.hamcrest.CoreMatchers;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.io.UnsupportedEncodingException;
+import java.net.URLDecoder;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+
+public class EncoderDecoder {
+
+    @Test
+    public void givenPlainURL_whenUsingUTF8EncodingScheme_thenEncodeURL() throws UnsupportedEncodingException {
+        String plainURL = "http://www.baeldung.com" ;
+        String encodedURL = URLEncoder.encode(plainURL, StandardCharsets.UTF_8.toString());
+
+        Assert.assertThat("http%3A%2F%2Fwww.baeldung.com", CoreMatchers.is(encodedURL));
+    }
+
+    @Test
+    public void givenEncodedURL_whenUsingUTF8EncodingScheme_thenDecodeURL() throws UnsupportedEncodingException {
+        String encodedURL = "http%3A%2F%2Fwww.baeldung.com" ;
+        String decodedURL = URLDecoder.decode(encodedURL, StandardCharsets.UTF_8.toString());
+
+        Assert.assertThat("http://www.baeldung.com", CoreMatchers.is(decodedURL));
+    }
+
+    @Test
+    public void givenEncodedURL_whenUsingWrongEncodingScheme_thenDecodeInvalidURL() throws UnsupportedEncodingException {
+        String encodedURL = "http%3A%2F%2Fwww.baeldung.com";
+
+        String decodedURL = URLDecoder.decode(encodedURL, StandardCharsets.UTF_16.toString());
+
+        Assert.assertFalse("http://www.baeldung.com".equals(decodedURL));
+    }
+}