使用龟兔赛跑模拟多线程切换

package 线程;
public class Race implements Runnable{
    //龟兔赛跑
    //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%10==0){
                try {
                    Thread.sleep(3);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }

            boolean flag=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){
        //判断是否由胜利者
        if(winner!=null){//已经存在胜利者
            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();//给线程命名
        new Thread(race,"乌龟").start();
    }
}