FileChannel锁定文件

当FileLock fl = fc.tryLock();执行成功之后，当前虚拟机内其它线程，包括当前操作系统（起码win XP肯定是这样儿的），都无法访问指定的文件
D:\\SOCKET\\server_fa\\test.txt

package com.wlh.filechannel;

import java.io.File;
import java.io.FileReader;
import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;
import java.nio.channels.FileLock;

public class LockFile {
	public LockFile() {
	}

	public static void main(String[] args) throws Exception {

		RandomAccessFile raf = new RandomAccessFile(new File("D:\\SOCKET\\server_fa\\test.txt"),"rw");
		FileChannel fc = raf.getChannel();
		FileLock fl = fc.tryLock();
		if (fl.isValid()) {
			System.out.println("get   the   lock!");
			//测试线程
			new Thread() {
				public void run() {
					while (true) {
						try {
							Thread.sleep(100);
							FileReader fr = new FileReader(new File(
									"D:\\SOCKET\\server_fa\\test.txt"));
							int c;
							while ((c = fr.read()) != -1) {
								System.out.println("OK=" + (char) c);
							}
							fr.close();
							break;
						} catch (Exception e) {
							System.out.println("error=" + e);
						}
					}
				}
			}.start();
			//模拟其它操作的耗时：比如用notepad打开无法修改。但是用程序来读写此文件都会异常
			raf.write("我刚才被被锁定啦。。。".getBytes());
			Thread.sleep(5000);
			fl.release();
			System.out.println("release the lock!");
		}
		raf.close();
	}
}