package com.simon.study;/** * 线程死锁 一个线程要同时拥有两个对象的资源才能进行下一步操作； * @author: Simon * @date: 2017年7月29日 下午9:48:43 */public class DeadLock implements Runnable{  static Object o1=new Object(),o2=new Object();  public int flag=1;       public void run() {           // TODO Auto-generated method stub           System.out.println("flag***********"+flag);           if(flag==1){                synchronized (o1) {                      try {                           Thread.sleep(500);                      } catch (Exception e) {                           // TODO: handle exception                      }                      synchronized (o2) {                           System.out.println("这里线程1获取所有的线程权限");                      }                }                                }           if(flag==0){                synchronized (o2) {                      try {                           Thread.sleep(500);                      } catch (Exception e) {                           // TODO: handle exception                      }                      synchronized (o1) {                           System.out.println("这里线程2获取所有的线程权限");                      }                }                           }           }     public static void main(String[] args){           DeadLock deadLock1=new DeadLock();           DeadLock deadLock2=new DeadLock();           deadLock1.flag=1;           deadLock2.flag=0;           Thread r1=new Thread(deadLock1);           Thread r2=new Thread(deadLock2);           r1.start();           r2.start();     }     }