线程锁lock

线程锁lock

package com.peanutist.day10;
​
import com.sun.org.apache.bcel.internal.generic.NEW;
​
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
​
public class TestLock {
    public static void main(String[] args) {
        BuyTicketAgain buyTicketAgain = new BuyTicketAgain();
        new Thread(buyTicketAgain).start();
        new Thread(buyTicketAgain).start();
        new Thread(buyTicketAgain).start();
    }
}
class BuyTicketAgain implements Runnable{
​
    int ticket =10;
    //创建一个锁
    private final ReentrantLock lock = new ReentrantLock();
    @Override
    public void run() {
        while (true){
            try {
                lock.lock();//加锁
                if (ticket>0){
                    System.out.println("卖了第"+ticket+"张票");
                    ticket--;
                }else {
                    break;
                }
            }finally {
                lock.unlock();//解锁
            }
        }
    }
}