JUC-Lock接口概述和实现案例

向右看齐 2024-04-06 09:49 68阅读 0赞

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package com.nanjing.juc;
    
    import java.util.concurrent.locks.ReentrantLock;
    
    class LockTicket{
        //票的数量
        private int number = 300;
        //创建可重入锁
        private final ReentrantLock lock = new ReentrantLock();
        //操作方法：卖票
        public void sale(){
            //上锁
            lock.lock();
            //判断是否有票
            try {
                if(number > 0){
                    System.out.println(Thread.currentThread().getName()+" ：卖出："+(number--)+" 剩下："+number);
                }
            } finally {
                //解锁
                lock.unlock();
            }
    
        }
    }
    
    public class LockSaleTicket_03 {
        //创建多个线程，调用资源类的操作方法
        public static void main(String[] args) {
            //创建LockTicket对象
            LockTicket lockTicket = new LockTicket();
            //创建三个线程
            /*new Thread(new Runnable() {
                @Override
                public void run() {
                    //调用卖票的方法
                    for (int i = 0; i < 300; i++) {
                        ticket.sale();
                    }
                }
            },"刘德华").start();*/
            
            //lambda写法
            new Thread(()->{
                for (int i = 0; i < 300; i++) {
                    lockTicket.sale();
                }
            },"刘德华").start();
    
            new Thread(()->{
                for (int i = 0; i < 300; i++) {
                    lockTicket.sale();
                }
            },"张学友").start();
    
            new Thread(()->{
                for (int i = 0; i < 300; i++) {
                    lockTicket.sale();
                }
            },"黎明").start();
    
        }
    }

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