方式二的练习

class SaleTicket implements Runnable{
    
    int num = 50;//票数
    @Override
    public void run() {
        while(true) {
            synchronized ("锁") {
                if(num>0) {
                    System.out.println(Thread.currentThread().getName()+"窗口买了"+num+"号票");
                    num--;
                }else {
                    System.out.println(Thread.currentThread().getName()+"窗口票卖完了");
                    break;
                }
            }
    
        }
    }
}


public class Demo1 {
    public static void main(String[] args) {
        SaleTicket ticket = new SaleTicket();
        Thread thread1 = new Thread(ticket,"窗口1");
        Thread thread2 = new Thread(ticket,"窗口2");
        Thread thread3 = new Thread(ticket,"窗口3");
        thread1.start();
        thread2.start();
        thread3.start();
    
    }
}