java--龟兔赛跑模拟

Posted 2020-12-23 lee-leo

//龟兔赛跑
public class Race implements Runnable{

    private static String winner;

    @Override
    public void run() {
        for (int i = 0; i <= 100 ;) {
            //模拟兔子休息
            if (Thread.currentThread().getName().equals("兔子") && i%20==0){
                try {
                    Thread.sleep(1);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            boolean flag = gameOver(i);
            if (flag){
                break;
            }
            if (Thread.currentThread().getName().equals("兔子")){
                i += 10;
            }else {
                i++;
            }
            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){
            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();
    }
}