线程安全（窗口售票小程序）

package com.ydlclass.thread;

public class WindowSellTickets implements Runnable{
    private static int count = 100;
    String name;

    public WindowSellTickets(String name) {
        this.name = name;
    }

    @Override
    public void run() {

        while (count > 0 ){
            try {
                Thread.sleep(500);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(name + "卖票一张，剩余：" + count-- + "张！");
            //不加同步代码块的情况下，线程可能对一共享资源进行抢占，从而导致线程争抢的问题；下面是解决此问题的方法


            //  synchronized(WindowSellTickets.class) {
            //  System.out.println(name + "卖票一张，剩余：" + count-- + "张！");
            //  }
        }

    }

    public static void main(String[] args) {
        Thread t1 = new Thread(new WindowSellTickets("窗口1"));
        Thread t2 = new Thread(new WindowSellTickets("窗口2"));
        t1.start();
        t2.start();

    }
}