java多线程之模拟死锁

package thread;

public class TestDeadLock implements Runnable{
	public int flag = 1;
	static Object o1 = new Object(),o2 = new Object();
	
	@Override
	public void run() {
		System.out.println("flag:"+flag);
		if(flag==1){
			synchronized(o1){
				try {
					Thread.sleep(100);
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				synchronized(o2){
					System.out.println("我是o2，被锁住了");
				}
			}
		}
		if(flag==0){
			synchronized(o2){
				try {
					Thread.sleep(100);
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				synchronized(o1){
					System.out.println("我是o1，被锁住了");
				}
			}
		}
		
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		TestDeadLock d1 = new TestDeadLock();
		TestDeadLock d2 = new TestDeadLock();
		Thread t1 = new Thread(d1);
		Thread t2 = new Thread(d2);
		d1.flag = 1;
		d2.flag = 0;
		t1.start();
		t2.start();
	}
}

运行结果为

flag:1
flag:0

由于发生死锁，两条if语句中的打印语句永远都不会执行