多线程之龟兔赛跑

//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++) {

            //模拟兔子休息
            if (Thread.currentThread().getName().equals("兔子")&& i%50==0){
                try {
                    Thread.sleep(2);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }

            //判断比赛是否结束
            boolean flag = gameOver(i);
            //如果比赛结束了，就停止程序
            if (flag){
                break;
            }
            System.out.println(Thread.currentThread().getName()+"-->跑了"+i+"步");
        }
    }
    //判断是否比赛结束
    private boolean gameOver(int steps){
        //判断是否有胜利者
        if (winner!=null){//存在胜利者了
            return true;
        }{
            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,"兔子").start();
        new Thread(race,"乌龟").start();
    }
}