1 package com.jenne.jucdemo;

 2

 3 import java.util.concurrent.locks.Lock;

 4 import java.util.concurrent.locks.ReentrantLock;

 5

 6 /**

 7  * 资源类

 8  */

 9 class Ticket {

10     private int number = 30;

11     private Lock lock = new ReentrantLock();

12

13     public void sale() {

14         lock.lock();//加锁

15

16         try {

17             if (number > 0) {

18                 System.out.println(Thread.currentThread().getName() + "\t 卖出" + number-- + "号票\t还剩" + number

19                 );

20             }

21         } catch (Exception e) {

22             e.printStackTrace();

23         } finally {

24             lock.unlock();//解锁

25         }

26     }

27 }

28

29 public class SaleTicket {

30

31     public static void main(String[] args) throws Exception {

32         Ticket ticket = new Ticket();

33

34         new Thread(() -> {

35             for (int i = 1; i <= 40; i++) ticket.sale();

36         }, "AA").start();

37

38         new Thread(() -> {

39             for (int i = 1; i <= 40; i++) ticket.sale();

40         }, "BB").start();

41

42         new Thread(() -> {

43             for (int i = 1; i <= 40; i++) ticket.sale();

44         }, "CC").start();

45     }

46 }