java-写一个死锁的案例

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死锁:线程A持有一个对象a1的互斥锁，又试图获取另外一个对象b1的互斥锁，而线程B正好持有对象a1的互斥锁，并且试图获取对象b1的互斥锁，2个线程相互等待对方的资源而又互相不作出让步。

<span style="font-size:14px;">package com.test;/** * 死锁测试 * @author mooner * */public class DeadThreadLock {public static void main(String[] args) {String s1 = "a";String s2 = "b";ThreadLock t1 = new ThreadLock(s1,s2);  //持有"a"的互斥锁，尝试获取"b"的互斥锁t1.start();ThreadLock t2 = new ThreadLock(s2,s1);  //持有"b"的互斥锁，尝试获取"a"的互斥锁t2.start();}}/** * 死锁多线程 * @author mooner * */class ThreadLock extends Thread{private String s1;private String s2;public ThreadLock(){}public ThreadLock(String s1,String s2){this.s1 = s1;this.s2 = s2;}public void run(){synchronized(s1){  //获取s1对象的互斥锁System.out.println(Thread.currentThread().getName()  +"持有对象  "+s1+"  的锁");try {Thread.sleep(4000);  //睡眠4s钟，好在获取s2对象的互斥锁前，另外一个线程开始运行} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}System.out.println(Thread.currentThread().getName()  +"尝试获取  "+s2+"  的锁");synchronized(s2){  //获取s2对象的互斥锁子}}}}</span>

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