package top.qaqaq.java.P436;

/**
 * 使用同步方法处理继承Thread类的方式中的线程安全问题
 *
 * @author RichieZhang
 * @create 2022-10-21 下午 1:22
 */
class Window4 extends Thread {

    private static int ticket = 100;

    @Override
    public void run() {
        while (true) {

            show();
        }
    }

    private static synchronized void show() {//同步监视器：Window4.class
//    private synchronized void show(){//同步监视器：t1,t2,t3。此种解决方式是错误的
        if (ticket > 0) {

            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

            System.out.println(Thread.currentThread().getName() + ": 卖票，票号为：" + ticket);

            ticket--;
        }
    }
}

public class WindowTest4 {

    public static void main(String[] args) {

        Window4 t1 = new Window4();
        Window4 t2 = new Window4();
        Window4 t3 = new Window4();

        t1.setName("窗口1");
        t2.setName("窗口2");
        t3.setName("窗口3");

        t1.start();
        t2.start();
        t3.start();
    }
}