Getting channels from streams : File Reader « File Input Output « Java

Getting channels from streams

// :
// Getting channels from streams
// {Clean: data.txt}
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// See copyright notice in CopyRight.txt.

import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class GetChannel {
  private static final int BSIZE = 1024;

  public static void main(String[] args) throws Exception {
    // Write a file:
    FileChannel fc = new FileOutputStream("data.txt").getChannel();
    fc.write(ByteBuffer.wrap("Some text ".getBytes()));
    // Add to the end of the file:
    fc = new RandomAccessFile("data.txt", "rw").getChannel();
    fc.position(fc.size()); // Move to the end
    fc.write(ByteBuffer.wrap("Some more".getBytes()));
    // Read the file:
    fc = new FileInputStream("data.txt").getChannel();
    ByteBuffer buff = ByteBuffer.allocate(BSIZE);;
    while (buff.hasRemaining())
      System.out.print((char) buff.get());
} ///:~

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