龟兔赛跑

Posted 2021-06-05 逆骨111

package cn.ruhsang.demo01;


//模拟龟兔赛跑
public class Race implements Runnable{
    //胜利者
    private static String winner;

    @Override
    public void run() {
        for (int i = 0; i <=100 ; i++) {
            //模拟兔子睡觉
            if(Thread.currentThread().getName().equals("兔子")&&i % 10 == 0){
                try {
                    Thread.sleep(5);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            //判断是否比赛结束
            boolean flag = this.gameOver(i);
            //如果比赛结束,就停止程序
            if(flag){
                break;
            }

            System.out.println(Thread.currentThread().getName()+"---->跑了"+i+"步");
        }
    }
    //判断是否完成比赛
    private boolean gameOver(int steps){
        if(winner!=null){//已经存在胜利者了
            return true;
        }else {
            if(steps>=100){
                winner = Thread.currentThread().getName();
                System.out.println("winner is"+winner);
                return true;
            }
        }
        return false;
    }

    public static void main(String[] args) {
        Race race = new Race();
        new Thread(race,"乌龟").start();
        new Thread(race,"兔子").start();
    }
}