Java死锁例子

public class TestDeadLock implements Runnable{public int flag = 1;static Object o1 = new Object(), o2 = new Object();public static void main(String[] argv){TestDeadLock td1 = new TestDeadLock();TestDeadLock td2 = new TestDeadLock();td1.flag = 1;td2.flag = 0;Thread t1 = new Thread(td1);Thread t2 = new Thread(td2);t1.start();t2.start();}public void run(){System.out.println("flag = "+ flag);if(flag == 1){synchronized (o1){try{Thread.sleep(500);}catch(Exception e){e.printStackTrace();}synchronized(o2){System.out.println("1");}}}if(flag == 0){synchronized(o2){try{Thread.sleep(500);}catch(Exception e){e.printStackTrace();}synchronized(o1){System.out.println("0");}}}}}