Java检测死锁案例

package com.study.train;

import java.io.IOException;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.lang.reflect.Field;
import java.util.*;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.FutureTask;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

import static java.lang.Thread.yield;

public class Main extends Thread{
    private Object o1;
    private Object o2;
    Main(Object oa,Object ob,String name) {
        super(name);
        o1 = oa;
        o2 = ob;
    }

    @Override
    public void run() {
        synchronized (o1) {
            System.out.println("thread: "+Thread.currentThread().getName() + " get lock");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            synchronized (o2) {
                System.out.println("two lock is get");
            }
        }
    }

    public static void main(String[] args) throws InterruptedException {
       Object oj1 = new Object();
       Object oj2 = new Object();
       Main m1 = new Main(oj1,oj2,"thread1");
       Main m2 = new Main(oj2,oj1,"thread2");
       m1.start();
       m2.start();
       m1.join();
       m2.join();
    }
}