使用同步锁方法模拟抢票

/**
 *     使用同步方法模拟12306抢票
 */
public class SynMethed12306 {
    public static void main(String[] args) {
        Web12306 one = new Web12306();
        new Thread(one, "张三").start();
        new Thread(one, "李四").start();
        new Thread(one, "王五").start();
    }
}

class Web12306 implements Runnable{
    private int number = 50;    //票数
    private boolean flag = true;    //标识符
    @Override
    public void run() {
        while(flag) {
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            test();
        }
    }

    public synchronized void test() { //同步锁关键字
        if(number <= 0) {
            flag = false;
            return;
        }
        System.out.println(Thread.currentThread().getName() + "-->" + number--);
    }
    
}