1 package bytezero.threadsynchronization;
 2 
 3 
 4 
 5 /**
 6  * 使用同步方法解决实现 继承 Thread类 的线程安全问题
 7  *
 8  *
 9  *
10  * @author Bytezero1·zhenglei!    Email:420498246@qq.com
11  * create  2021-10-17 16:38
12  */
13  class WindowM extends Thread{
14     private static int ticket = 100;
15 
16     @Override
17     public void run() {
18         while (true){
19 
20             show();
21         }
22     }
23 
24     private static synchronized void show(){  //同步监视器：WindowM.class
25    // private synchronized void show(){   //同步监视器： w1 w2 w3 此种解决方式是错误的
26         if(ticket > 0){
27             try {
28                 Thread.sleep(100);
29             } catch (InterruptedException e) {
30                 e.printStackTrace();
31             }
32             System.out.println(Thread.currentThread().getName() + ":卖票，票号为："+ticket);
33             ticket--;
34         }
35     }
36 
37 }
38 
39 
40 public class WindowMethod {
41     public static void main(String[] args) {
42         WindowM w1 = new WindowM();
43         WindowM w2 = new WindowM();
44         WindowM w3 = new WindowM();
45 
46         w1.setName("窗口1");
47         w2.setName("窗口2");
48         w3.setName("窗口3");
49 
50         w1.start();
51         w2.start();
52         w3.start();
53 
54     }
55 
56 }

 

 

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