java 使用同步代码块解决卖票为负的问题 

 1 class MyThread implements Runnable{
 2     private int ticket=5;
 3     public void run(){
 4         for(int i=0;i<100;i++){
 5             synchronized (this){
 6                 if(ticket>0){
 7                     try{
 8                         Thread.sleep(300);
 9                     }catch(InterruptedException e){
10                         e.printStackTrace();
11                     }
12                     System.out.println("卖票：ticket="+ticket--);
13                 }
14             }
15         }
16     }
17 };
18 public class SyncDemo1 {
19     public static void main(String[] args) {
20         MyThread mt=new MyThread();
21         Thread t1=new Thread(mt);
22         Thread t2=new Thread(mt);
23         Thread t3=new Thread(mt);
24         t1.start();
25         t2.start();
26         t3.start();
27     }
28 }

 

posted @ 2012-03-13 19:47  谈笑风生膜法师  阅读(533)  评论(4)  编辑  收藏  举报