Java多线程卖票例子

 1 package com.test;
 2 
 3 public class SaleTickets implements Runnable
 4 {
 5     private int ticketCount = 10;// 总的票数
 6     Object mutex = new Object();// 锁
 7 
 8     /**
 9      * 卖票
10      */
11     public void sellTicket()
12     {
13         synchronized (mutex)// 当操作的是共享数据时,
14                         // 用同步代码块进行包围起来,这样在执行时,只能有一个线程执行同步代码块里面的内容
15         {
16             if (ticketCount > 0)
17             {
18                 ticketCount--;
19                 System.out.println(Thread.currentThread().getName()
20                         + "正在卖票,还剩" + ticketCount + "张票");
21             }
22             else
23             {
24                 System.out.println("票已经卖完！");
25                 return;
26             }
27         }
28     }
29 
30     public void run()
31     {
32         while (ticketCount > 0)// 循环是指线程不停的去卖票
33         {
34             sellTicket();
35             /**
36              * 在同步代码块里面睡觉,和不睡效果是一样 的,作用只是自已不执行,也不让线程执行
37              * 所以把睡觉放到同步代码块的外面,这样卖完一张票就睡一会,让其他线程再卖,这样所有的线程都可以卖票
38              */
39             try
40             {
41                 Thread.sleep(100);
42             }
43             catch (InterruptedException e)
44             {
45                 e.printStackTrace();
46             }
47         }
48     }
49 }

 1 package com.test;
 2 
 3 public class TicketMain
 4 {
 5 
 6     public static void main(String[] args)
 7     {
 8         SaleTickets runTicekt = new SaleTickets();
 9         Thread th1 = new Thread(runTicekt, "窗口1");
10         Thread th2 = new Thread(runTicekt, "窗口2");
11         Thread th3 = new Thread(runTicekt, "窗口3");
12         Thread th4 = new Thread(runTicekt, "窗口4");
13         th1.start();
14         th2.start();
15         th3.start();
16         th4.start();
17     }
18 
19 }