FileChanelNioUtil.java

package com.mtools.core.plugin.nio;

import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class FileChanelNioUtil {

	/**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		FileChanelNioUtil.getFileCxt();
	}

	public final static void getFileCxt() throws IOException {
		RandomAccessFile aFile = new RandomAccessFile("docs/nio.txt", "rw");
		FileChannel inChannel = aFile.getChannel();

		ByteBuffer buf = ByteBuffer.allocate(48);

		int bytesRead = inChannel.read(buf);
		while (bytesRead != -1) {

			System.out.println("Read " + bytesRead);
			buf.flip();
			System.out.print(buf.toString());
			while (buf.hasRemaining()) {
				System.out.print((char) buf.get());
			}

			buf.clear();
			bytesRead = inChannel.read(buf);
		}
		aFile.close();
	}
}