java死锁分析

1编写死锁案列，运行

package com.thread.thread.deadLock;


public class DeadLockTest {
	public static String objA = "strA";
	public static String objB = "strB";
	public static void main(String[] args){
		Thread a = new Thread(new Lock1());
		Thread b = new Thread(new Lock2());
		a.start();
		b.start();
	}
}
class Lock1 implements Runnable{
	@Override
	public void run(){
		try{
			System.out.println("Lock1 running");
			while(true){
				synchronized(DeadLockTest.objA){
					System.out.println("Lock1 lock strA");
					Thread.sleep(3000);//获取strA后先等一会儿，让Lock2有足够的时间锁住strB
					synchronized(DeadLockTest.objB){
						System.out.println("Lock1 lock strB");
					}
				}
			}
		}catch(Exception e){
			e.printStackTrace();
		}
	}
}
class Lock2 implements Runnable{
	@Override
	public void run(){
		try{
			System.out.println("Lock2 running");
			while(true){
				synchronized(DeadLockTest.objB){
					System.out.println("Lock2 lock strB");
					Thread.sleep(3000);
					synchronized(DeadLockTest.objA){
						System.out.println("Lock2 lock strA");
					}
				}
			}
		}catch(Exception e){
			e.printStackTrace();
		}
	}
}

　　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