利用多线程模拟龟兔赛跑(Java)

//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 = 1; i <= 100; i++){
            //模拟兔子休息
            if(Thread.currentThread().getName().equals("兔子") && i % 10 == 0){
                try {
                    Thread.sleep(20);//让线程休息20毫秒
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }

            //判断比赛是否结束
            boolean flag = gameOver(i);
            //比赛结束程序结束运行
            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){
        //判断是否有胜利者
        if(winner != null){//已有胜利者
            return true;
        }{
            if(steps >= 100){
                winner = Thread.currentThread().getName();
                System.out.println("胜利者是:"+winner);
                return true;
            }
        }
        return false;
    }

    public static void main(String[] args) {
        race t = new race();

        new Thread(t,"兔子").start();
        new Thread(t,"乌龟").start();
    }
}