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Adding files for the article BAEL-2257: Guide to OutputStream (#5386)

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Kumar Chandrakant 2018-10-08 14:52:59 +01:00 committed by Grzegorz Piwowarek
parent f046857975
commit 11dd36cb1a
2 changed files with 124 additions and 0 deletions
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48
core-java-io/src/main/java/com/baeldung/stream/OutputStreamExamples.java Normal file
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package com.baeldung.stream;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
public class OutputStreamExamples {
public void fileOutputStreamByteSequence(String file, String data) throws IOException {
byte[] bytes = data.getBytes();
try (OutputStream out = new FileOutputStream(file)) {
out.write(bytes);
}
}
public void fileOutputStreamByteSubSequence(String file, String data) throws IOException {
byte[] bytes = data.getBytes();
try (OutputStream out = new FileOutputStream(file)) {
out.write(bytes, 6, 5);
}
}
public void fileOutputStreamByteSingle(String file, String data) throws IOException {
byte[] bytes = data.getBytes();
try (OutputStream out = new FileOutputStream(file)) {
out.write(bytes[6]);
}
}
public void bufferedOutputStream(String file, String... data) throws IOException {
try (BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(file))) {
for (String s : data) {
out.write(s.getBytes());
out.write(" ".getBytes());
}
}
}
public void outputStreamWriter(String file, String data) throws IOException {
try (OutputStream out = new FileOutputStream(file); Writer writer = new OutputStreamWriter(out, "UTF-8")) {
writer.write(data);
}
}
}

76
core-java-io/src/test/java/com/baeldung/stream/OutputStreamExamplesTest.java Normal file
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package com.baeldung.stream;
import static org.junit.Assert.assertTrue;
import java.io.File;
import java.io.IOException;
import org.junit.Before;
import org.junit.Test;
public class OutputStreamExamplesTest {
StringBuilder filePath = new StringBuilder();
@Before
public void init() {
filePath.append("src");
filePath.append(File.separator);
filePath.append("test");
filePath.append(File.separator);
filePath.append("resources");
filePath.append(File.separator);
filePath.append("output_file.txt");
}
@Test
public void givenOutputStream_whenWriteSingleByteCalled_thenOutputCreated() throws IOException {
final File file = new File(filePath.toString());
OutputStreamExamples examples = new OutputStreamExamples();
examples.fileOutputStreamByteSingle(filePath.toString(), "Hello World!");
assertTrue(file.exists());
file.delete();
}
@Test
public void givenOutputStream_whenWriteByteSequenceCalled_thenOutputCreated() throws IOException {
final File file = new File(filePath.toString());
OutputStreamExamples examples = new OutputStreamExamples();
examples.fileOutputStreamByteSequence(filePath.toString(), "Hello World!");
assertTrue(file.exists());
file.delete();
}
@Test
public void givenOutputStream_whenWriteByteSubSequenceCalled_thenOutputCreated() throws IOException {
final File file = new File(filePath.toString());
OutputStreamExamples examples = new OutputStreamExamples();
examples.fileOutputStreamByteSubSequence(filePath.toString(), "Hello World!");
assertTrue(file.exists());
file.delete();
}
@Test
public void givenBufferedOutputStream_whenCalled_thenOutputCreated() throws IOException {
final File file = new File(filePath.toString());
OutputStreamExamples examples = new OutputStreamExamples();
examples.bufferedOutputStream(filePath.toString(), "Hello", "World!");
assertTrue(file.exists());
file.delete();
}
@Test
public void givenOutputStreamWriter_whenCalled_thenOutputCreated() throws IOException {
final File file = new File(filePath.toString());
OutputStreamExamples examples = new OutputStreamExamples();
examples.outputStreamWriter(filePath.toString(), "Hello World!");
assertTrue(file.exists());
file.delete();
}
}