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