チケット購入問題-スレッドの同期

 1 // 

 2 package ThreadL;

 3 

 4 public class Thread9 {

 5     public static void main(String[] args){

 6         Thread th1 = new Thread(new Thread9L(),"AAA");

 7         Thread th2 = new Thread(new Thread9L(),"BBBBBB");

 8         th1.start();

 9         th2.start();

10     }

11 }

12 class Thread9L implements Runnable{

13     static int ticket = 100;

14     static int count = 0;

15     public void run(){

16         while(true){

17             synchronized("L")　　　　// 

18             {

19                 if(ticket>0){

20 /*                    try {

21                         Thread.sleep(1000);

22                     } catch (InterruptedException e) {

23                         // TODO Auto-generated catch block

24                         e.printStackTrace();

25                     }

26 */                    System.out.println(Thread.currentThread().getName() + "\t \t" + ticket-- + "\t 。");

27                     count++;

28                 }else{

29                     System.out.println(Thread.currentThread().getName() + "\t 。\t" + count);

30                     break;

31                 }

32             }

33         }

34     }

35 }