java多线程 模拟死锁程序

public class TestDeadLock implements Runnable{
public int flag = 1;
public static Object o1 = new Object();
public static Object o2 = new Object();
public static void main(String[] args) {
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();

}

@Override
public void run() {
System.out.println("flag:"+flag);
if(flag==1){
synchronized(o1){
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
synchronized(o2){
System.out.println("1");
}
}

}
else if(flag == 0){
synchronized(o2){
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
synchronized(o1){
System.out.println("0");
}
}

}

}

}