买票问题-线程的同步

 1 //买票问题
 2 package ThreadL;
 3
 4 public class Thread9 {
 5     public static void main(String[] args){
 6         Thread th1 = new Thread(new Thread9L(),"AAA");
 7         Thread th2 = new Thread(new Thread9L(),"BBBBBB");
 8         th1.start();
 9         th2.start();
10     }
11 }
12 class Thread9L implements Runnable{
13     static int ticket = 100;
14     static int count = 0;
15     public void run(){
16         while(true){
17             synchronized("L")　　　　//动作原语
18             {
19                 if(ticket>0){
20 /*                    try {
21                         Thread.sleep(1000);
22                     } catch (InterruptedException e) {
23                         // TODO Auto-generated catch block
24                         e.printStackTrace();
25                     }
26 */                    System.out.println(Thread.currentThread().getName() + "\t出售第\t" + ticket-- + "\t张车票。");
27                     count++;
28                 }else{
29                     System.out.println(Thread.currentThread().getName() + "\t已售完。\t" + count);
30                     break;
31                 }
32             }
33         }
34     }
35 }