Java多线程卖票例子

 package com.test;

 public class SaleTickets implements Runnable
 {
     private int ticketCount = 10;// 总的票数
     Object mutex = new Object();// 锁

     /**
      * 卖票
      */
     public void sellTicket()
     {
         synchronized (mutex)// 当操作的是共享数据时,
                         // 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
         {
             if (ticketCount > 0)
             {
                 ticketCount--;
                 System.out.println(Thread.currentThread().getName()
                         + "正在卖票,还剩" + ticketCount + "张票");
             }
             else
             {
                 System.out.println("票已经卖完！");
                 return;
             }
         }
     }

     public void run()
     {
         while (ticketCount > 0)// 循环是指线程不停的去卖票
         {
             sellTicket();
             /**
              * 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
              * 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
              */
             try
             {
                 Thread.sleep(100);
             }
             catch (InterruptedException e)
             {
                 e.printStackTrace();
             }
         }
     }
 }

下面是调用

 package com.test;

 public class TicketMain
 {

     public static void main(String[] args)
     {
         SaleTickets runTicekt = new SaleTickets();
         Thread th1 = new Thread(runTicekt, "窗口1");
         Thread th2 = new Thread(runTicekt, "窗口2");
         Thread th3 = new Thread(runTicekt, "窗口3");
         Thread th4 = new Thread(runTicekt, "窗口4");
         th1.start();
         th2.start();
         th3.start();
         th4.start();
     }

 }

执行效果：