多线程 龟兔赛跑案例

package com.Java;

public class Race implements Runnable{
//    胜利者
    private  static String winner;
    @Override
    public void run() {
        for (int i = 0; i <=100; i++) {
            //如果是兔子就放慢速度
            if (Thread.currentThread().getName().equals("兔子")){
            try {
                Thread.sleep(1);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
            boolean lag = gameOver(i);
            if(lag){
            break;
        }
            System.out.println(Thread.currentThread().getName()+"-->跑了"+i+"米");

        }
    }

//    判断比赛是否完成
    public boolean gameOver(int steps){
        if(winner!=null){//已经有胜利者了
            return true;
        }
        //当有人跑到100米时 比赛完成
        if (steps>=100){
            winner = Thread.currentThread().getName();
            System.out.println("winner is:"+winner);
            return true;
        }
        return false;
    }
//开启多线程
    public static void main(String[] args) {
        Race race = new Race();
        new Thread(race,"兔子").start();
        new Thread(race,"乌龟").start();
    }
}