多线程——不安全案例

不安全的买票

package com.sympa.lesson01;

//线程不安全，有负数
public class Tickets01 implements Runnable{

    private int ticket = 10;
    @Override
    public void run() {
        while(true) {
            if (ticket <= 0) break;
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            //Thread.currentThread() 获得当前线程对象的引用
            System.out.println(Thread.currentThread().getName() + "拿到了第" + ticket-- + "张票");
        }
    }

    public static void main(String[] args){
        Tickets01 tickets01 = new Tickets01();
        new Thread(tickets01, "黄牛1号").start();
        new Thread(tickets01, "黄牛2号").start();
        new Thread(tickets01, "黄牛3号").start();
    }
}