java死锁分析

1编写死锁案列，运行

1package com.thread.thread.deadLock;
2
3
4public class DeadLockTest {
5	public static String objA = "strA";
6	public static String objB = "strB";
7	public static void main(String[] args){
8		Thread a = new Thread(new Lock1());
9		Thread b = new Thread(new Lock2());
10		a.start();
11		b.start();
12	}
13}
14class Lock1 implements Runnable{
15	@Override
16	public void run(){
17		try{
18			System.out.println("Lock1 running");
19			while(true){
20				synchronized(DeadLockTest.objA){
21					System.out.println("Lock1 lock strA");
22					Thread.sleep(3000);//获取strA后先等一会儿，让Lock2有足够的时间锁住strB
23					synchronized(DeadLockTest.objB){
24						System.out.println("Lock1 lock strB");
25					}
26				}
27			}
28		}catch(Exception e){
29			e.printStackTrace();
30		}
31	}
32}
33class Lock2 implements Runnable{
34	@Override
35	public void run(){
36		try{
37			System.out.println("Lock2 running");
38			while(true){
39				synchronized(DeadLockTest.objB){
40					System.out.println("Lock2 lock strB");
41					Thread.sleep(3000);
42					synchronized(DeadLockTest.objA){
43						System.out.println("Lock2 lock strA");
44					}
45				}
46			}
47		}catch(Exception e){
48			e.printStackTrace();
49		}
50	}
51}

　　2 jps -v找到对应的线程 （对于安装了jvisualvm或者jconsole的也可以通过图形界面直接查看死锁的堆栈信息）

 3jstack  7312 查看死锁的相关信息

 可以看出thread-1锁住0x000000076f3b0308 等待0x000000076f3b02f0 与thread-0恰好相反