线程实现

1.定义一个实体类
实现callable接口

class Ract implements Callable{

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();
}