114.线程安全原因分析

package com.itheima.threaddemo9;

public class Ticket implements Runnable{
    private int ticket=100;

    @Override
    public void run() {
        while (true){
            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");
            }
        }
    }
}

package com.itheima.threaddemo9;

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();
    }
}