死锁

 

/*
 * 若o1,o2同时被锁定，
 *     则执行···
 *
 * */
public class deadLock implements Runnable{

 /**
  * @param args
  */
 private int flag = 0 ;
 static Object o1= new Object(),o2 = new Object();//注意：static 否则的话就不是死锁；因为static 变量是静态变量
 deadLock(int flag){
  this.flag = flag;
 }
 public static void main(String[] args) {
           deadLock dead1 = new deadLock(0);
           deadLock dead2 = new deadLock(1);
           Thread thread1 = new Thread(dead1);
           Thread thread2 = new Thread(dead2);
           thread1.start();
           thread2.start();
 }

 @Override
 public void run() {
  System.out.println("flag:"+flag);// TODO Auto-generated method stub
  if(flag==0){
  synchronized(o1){
  try {
   Thread.sleep(500);//sleep时不放开锁；
  }catch(InterruptedException e){
   System.out.println(" o1休眠被打断。。。");
  }
  synchronized(o2){
   System.out.println("o2也被锁定");
  }//end synchronized(o2)
  }//end synchronized(o1)
  }//end if;
  if(flag == 1){
   synchronized(o2){
    try {
     Thread.sleep(500);
    }catch(InterruptedException e){
     System.out.println("o2休眠被打断。。");
    }
   synchronized(o1){
    System.out.println("o1也别锁定");
   }//end synchronized(o1);
   }//end synchronized(o2)
  }// end if
 }//end run();

}

原文链接： http://blog.csdn.net/weiyirong/article/details/6668594