filechannelexample3.java

JAVA SE6 全方位学习 朱仲杰 编著 机械工业出版社出版

import java.io.*;
import java.nio.*;
import java.nio.channels.*;

public class FileChannelExample3
{
	public static void main(String args[]) throws Exception
	{
		RandomAccessFile fin= new RandomAccessFile("data.txt", "rw");
		FileChannel fc = fin.getChannel();
		MappedByteBuffer mb = fc.map(FileChannel.MapMode.READ_WRITE, 0, fc.size());
		fc.close();
		mb.putChar('x');
	}
}