118.ReentrantLock

最新推荐文章于 2025-05-30 09:35:09 发布

原创最新推荐文章于 2025-05-30 09:35:09 发布 · 46 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#java #开发语言 #后端

JAVAWeb 专栏收录该内容

383 篇文章

订阅专栏

本文介绍了一个使用Java并发包ReentrantLock实现的多线程卖票应用，通过Ticket类的Runnable实现线程安全的售票过程，展示了如何使用锁控制资源并发访问。

package com.itheima.threaddemo12;

import java.util.concurrent.locks.ReentrantLock;

public class Ticket implements Runnable {
    private int ticket = 100;
    private Object obj = new Object();
    private ReentrantLock lock = new ReentrantLock();

    @Override
    public void run() {
        while (true) {
            try {
                lock.lock();
                //synchronized (obj){//多个对象用同一把锁
                if (ticket <= 0) {
                    //买完了
                    break;
                } else {
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    ticket--;
                    System.out.println(Thread.currentThread().getName() + "在卖票，还剩下" + ticket + "张票");
                }

            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                lock.unlock();
            }
            //}

        }
    }
}

package com.itheima.threaddemo12;

public class Demo {
    public static void main(String[] args) {
        /*Ticket ticket1=new Ticket();
        Ticket ticket2=new Ticket();
        Ticket ticket3=new Ticket();
        Thread t1=new Thread(ticket1);
        Thread t2=new Thread(ticket2);
        Thread t3=new Thread(ticket3);*/

        Ticket ticket=new Ticket();
        Thread t1=new Thread(ticket);
        Thread t2=new Thread(ticket);
        Thread t3=new Thread(ticket);
        t1.setName("窗口1");
        t2.setName("窗口2");
        t3.setName("窗口3");
        t1.start();
        t2.start();
        t3.start();
    }
}