1.定义一个实体类

实现callable接口

class Ract implements Callable<Integer>{

    private String name;//姓名
    private long time;//延时时间
    private boolean flag = true; // 标记
    private int step = 0 ;//步数

    public Ract(String name, long time) {
        super();
        this.name = name;
        this.time = time;
    }

    @Override
    public Integer call() throws Exception {
        while(flag){//当标记为true的时候，会一直走
            Thread.sleep(time);//每隔多长时间走一步
            step ++ ;
        }
        return step;
    }

创建主线程

public static void main(String args[]) throws InterruptedException, ExecutionException{
        //创建一个定长的线程池
        ExecutorService pool = Executors.newFixedThreadPool(2);

        Ract ract = new Ract("乌龟",1000);
        Ract ract2 = new Ract("兔子",200);

        Future<Integer> submit = pool.submit(ract);
        Future<Integer> submit2 = pool.submit(ract2);

        //设定时间为多长，时间到了，结束跑步
        Thread.sleep(2000);
        ract.setFlag(false);
        ract2.setFlag(false);


        Integer integer = submit.get();
        Integer integer2 = submit2.get();

        System.out.println("兔子走了："+integer2+"步");
        System.out.println("乌龟走了："+integer+"步");

        pool.shutdownNow();
    }

结果