java多线程

 1 package javase;
 2 
 3 class Ticket implements Runnable{
 4     
 5     private int num = 300;
 6     
 7     Object obj = new Object();
 8     
 9     public void run() {
10         
11         show();
12     }
13     
14     public void show() {
15         
16         synchronized (obj) {
17             
18             while(num>0) {
19                 
20                 try {
21                     Thread.sleep(10);
22                 } catch (InterruptedException e) {
23                     e.printStackTrace();
24                 }
25                 
26                 System.out.println(Thread.currentThread().getName()+" ticket="+num--);
27             }
28         }
29         
30     }
31     
32 }
33 
34 public class ThreadDemo2 {
35 
36     public static void main(String[] args) {
37         
38         Ticket t = new Ticket();
39         Thread t1 = new Thread(t);
40         Thread t2 = new Thread(t);
41         Thread t3 = new Thread(t);
42         
43         t1.start();
44         t2.start();
45         t3.start();
46         
47     }
48 
49 }