线程安全方式02Runnable---同步方法

/**
 * Runnable方式线程安全---同步方法
 *
 * @Author: ITYW
 * @Create 2020 - 10 - 26 - 18:59
 */
public class RunnableSecurity02 {
    public static void main(String[] args) {
        Runnable_Security02 runnable_security02 = new Runnable_Security02();
        Thread t1 = new Thread(runnable_security02);
        Thread t2 = new Thread(runnable_security02);
        Thread t3 = new Thread(runnable_security02);

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

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

class Runnable_Security02 implements Runnable{
     private static int ticket = 100;
    @Override
    public void run() {
        while (true){
            sale();
        }

    }

    private static synchronized void sale(){
        if (ticket > 0){
            System.out.println(Thread.currentThread().getName()+"卖出了第"+ticket+"张");
            ticket--;
        }
    }
}