获取lock锁后发生异常后，线程退出，lock锁不释放

package com.horizon.thread.basic;

import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
/**
 *  演示功能：
 *   当lock锁获得后如果发生异常，线程结束，但是 lock锁不会释放
 *  @author  <a href="wangxinchun@yahoo.com.cn">新春.王</a> 
 *
 */
public class ThreadException extends Thread{
	static Lock lock1 = new ReentrantLock();
	static Lock lock2 = new ReentrantLock();
    private static boolean flag = true;
	public ThreadException() {

	}

	public static void main(String[] args) {
		new ThreadException().start();
		new ThreadException().start();
	}

	@Override
	public void run() {
		if(flag){
			flag = false;
			lock1.lock();
			if(true){ //此处故意抛出运行时异常，当前线程结束，但是锁没有释放
				throw new NumberFormatException();
			}
			lock2.lock();
			System.out.println("flag :true");
			try {
				Thread.sleep(1000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
			lock2.unlock();
			lock1.unlock();
		}else{
			flag = true;
			lock2.lock();
                           //再次获取lock1时 suspend 
			lock1.lock();
			System.out.println("flag :false");
			try {
				Thread.sleep(1000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
			lock1.unlock();
			lock2.unlock();
		}
		super.run();
	}
}

[b][color=red]注意：不是每次运行都能看的效果，请思考下，如何看到我们想要的效果效果（请逐步调试）[/color][/b]