[大数据]JAVA大数据的第二十六天——多线程二

//演示示例11  练习7
public class Test implements Runnable{   //1，实现Runnable接口
    private int count=50;  //记录剩余票数
    private int num = 0;   //记录买到第几张票
    //1，同步代码块
    public void run(){
        while (count>0) {//synchronized (this){}放在while里面
            synchronized (this){
                num++;
                count--;
                if(count<0)
                    return;
                try {
                    Thread.sleep(500); // 模拟网络延时
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                System.out.println(Thread.currentThread().getName() + "抢到第" + num
                        + "张票，剩余" + count + "张票！");
                //黄牛党仅限买一张票
                if(Thread.currentThread().getName().equals("黄牛党")){
                    return ;
                }
            }
        }
    }
    //2，同步方法
  /*  public void run() {
        while (count>0) {
           buyTicket();
        }
    }
    public synchronized void buyTicket(){
        num++;
        count--;
        if(count<0)
            return;
           try {
                Thread.sleep(500); // 模拟网络延时
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        System.out.println(Thread.currentThread().getName() + "抢到第" + num
                + "张票，剩余" + count + "张票！");
    }*/
    public static void main(String[] args) {
        Test t = new Test();  //3，创建实现类对象
        Thread p1= new Thread(t,"桃跑跑");  //4，把对象装进线程中
        Thread p2= new Thread(t,"张票票");
        Thread p3= new Thread(t,"黄牛党");
        System.out.println("********开始抢票********");
        p1.start();//调用方法
        p2.start();
        p3.start();
    }
}

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