Java_多线程模拟死锁过程

1.需求：通过Java程序来模拟死锁过程，之后通过Jconsole和Jstack分析死锁原因

• 新起两个线程，互相拿着一个零界资源不放，并且又在请求一个新的资源，DeadLock1拿着obj1,想要obj2，DeadLock1拿着obj2,想要obj1，进而造成死锁。

2.程序代碼

/**
 * Project Name:JVM 
 * File Name:JconsoleTest.java
 * Description: TODO
 * Copyright: Copyright (c) 2017 
 * Company:SAP
 * 
 * @author SAP
 * @date Apr 5, 2019 7:50:10 PM
 * @version 
 * @see
 * @since 
 */
 
package com.sap.test5.jvm;

/**
  * ClassName: JconsoleTest
  * Description: TODO
  * @author SAP
  * @version 
  * @see
  * @since 
  */

public class JconsoleTest
{
    public static void main(String[] args)
    {
        Object obj1 = new Object();
        Object obj2 = new Object();
        JconsoleTest jt = new JconsoleTest();
        DeadLock dl1 = jt.createDeadLock(obj1, obj2);
        DeadLock dl2 = jt.createDeadLock(obj2, obj1);
        
        new Thread(dl1,"DeadLock1").start();
        new Thread(dl2,"DeadLock2").start();
    }
    
    public class DeadLock implements Runnable{

        private Object obj1;
        private Object obj2;
        
        
        
        /**
          * create an instance: DeadLock. 
          * Title: DeadLock
          * Description: TODO
          * @param obj1
          * @param obj2
          */
        
        public DeadLock(Object obj1, Object obj2)
        {
            super();
            this.obj1 = obj1;
            this.obj2 = obj2;
        }


        @Override
        public void run()
        {
            synchronized(obj1)
            {
                try
                {
                    Thread.sleep(1000);
                }
                catch (InterruptedException e)
                {
                      
                    // TODO Auto-generated catch block  
                    e.printStackTrace();  
                    
                }
                synchronized(obj2)
                {
                    System.out.println("Helo");
                }
            }
        }
    }
    
    public DeadLock createDeadLock(Object obj1, Object obj2)
    {
        return new DeadLock(obj1, obj2);
    }
}
 

3.通过jstack

4.通过jconsole分析