Java中Lock锁的基本使用

1,创建锁

2,加锁

3,解锁

package com.liu.demo01;

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

public class SaleTickeDemo01 {

    public static void main(String[] args) {
        Ticket ticket = new Ticket();
        //并发线程操作同一个资源类
        new Thread(()->{for (int i = 0; i < 50; i++)ticket.sale();},"A").start();
        new Thread(()->{ for (int i = 0; i < 50; i++)ticket.sale(); },"B").start();
        new Thread(()->{ for (int i = 0; i < 50; i++)ticket.sale(); },"C").start();

    }
}

//lock锁
class Ticket{
    private int number = 50;

    Lock lock = new ReentrantLock();//创建锁

    public void  sale(){
        lock.lock();//加锁

        try {
            if(number>0){
                System.out.println(Thread.currentThread().getName() + "卖出第" + (number--) + "张票,剩余" + number);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            lock.unlock();//解锁
        }

    }
}