java2 多线程2 买票

  /**
     * 这样买票会出现卖出超过100张票，把num静态化可以解决这个问题
     */
    private static void test1(){
        System.out.println("开始卖票"+Thread.currentThread().getName());
        Ticket ticket= new Ticket();
        Thread t1=new Thread(ticket);
        Thread t2=new Thread(ticket);
        Thread t3=new Thread(ticket);
        Thread t4=new Thread(ticket);
        t1.start();
        t2.start();
        t3.start();
        t4.start();
        System.out.println("结束卖票"+Thread.currentThread().getName());
    }

class Ticket implements Runnable{
    private int num=100;
    @Override
    public void run() {
        sale();
    }
    private void sale(){
        while (true){
            if(num>0){
                System.out.println("正在卖第"+num+"张票"+Thread.currentThread().getName());
                num--;
            }
        }
    }
}