死锁

import sun.security.krb5.internal.TGSRep;


public class Test14 implements Runnable {
    public int flag=1;
    static Object o1=new Object(), o2=new Object();

    public static void main(String[] args) {
        Test14 td1=new Test14();
        Test14 td2=new Test14();
        td1.flag=1;
        td2.flag=0;
        Thread t1=new Thread(td1);
        t1.setName("线程一");
        Thread t2=new Thread(td2);
        t2.setName("线程二");
        t1.start();
        t2.start();

    }

    @Override
    public void run() {
        System.out.println("falg"+flag);
        if(flag==1){
            synchronized (o1) {

                try {
                    Thread.sleep(500);
                } catch (InterruptedException e) {

                    e.printStackTrace();
                }
                System.out.println(Thread.currentThread().getName()+"在执行操作");
                synchronized (o2) {
                    System.out.println("1");
                }

            }

        }

        if(flag==0){
            synchronized (o2) {

                try {
                    Thread.sleep(500);
                } catch (InterruptedException e) {

                    e.printStackTrace();
                }
                System.out.println(Thread.currentThread().getName()+"在执行操作");
                synchronized (o1) {
                    System.out.println("0");
                }

            }

        }

    }




}