1 /**
 2  *     使用同步方法模擬12306搶票
 3  */
 4 public class SynMethed12306 {
 5     public static void main(String[] args) {
 6         Web12306 one = new Web12306();
 7         new Thread(one, "張三").start();
 8         new Thread(one, "李四").start();
 9         new Thread(one, "王五").start();
10     }
11 }
12 
13
 
 class Web12306 implements Runnable{
14     private int number = 50;    //票數
15     private boolean flag = true;    //識別符號
16     @Override
17     public void run() {
18         while(flag) {
19             try {
20                 Thread.sleep(100);
21             } catch (InterruptedException e) {
22                 e.printStackTrace();
 
23             }
24             test();
25         }
26     }
27 
28     public synchronized void test() { //同步鎖關鍵字
29         if(number <= 0) {
30             flag = false;
31             return;
32         }
33         System.out.println(Thread.currentThread().getName() + "-->" + number--);
34     }
 
35     
36 }