线程同步——火车票问题

 1 public class Demo {
 2     public static void main(String[] args) {
 3          Ticket t = new Ticket();
 4         new Thread() {                                        //线程一
 5 
 6             @Override
 7             public void run() {
 8             try {
 9                 this.sleep(10);
10             } catch (InterruptedException e) {
11                 // TODO Auto-generated catch block
12                 e.printStackTrace();
13             }
14             t.saleTicket();
15             }
16         }.start();
17         
18         new Thread() {                                        //线程二
19             
20             @Override
21             public void run() {
22                 try {
23                     this.sleep(100);
24                 } catch (InterruptedException e) {
25                     // TODO Auto-generated catch block
26                     e.printStackTrace();
27                 }
28                 t.saleTicket();
29             }
30         }.start();
31         
32     }
33 }
34 
35 class Ticket {
36     private int ticket = 100;
37     public void saleTicket() {　　　　
38         while (ticket != 0) {
39             synchronized(Ticket.class) {
40                 System.out.println("...这是第" + ticket-- + "号票");
41             } 
42         }
43     }
44 }