java线程池ExecutorService，Future使用

线程想用的舒服，自己去判断结束太麻烦了。使用jdk的自带了类很好用

package com.github.pig.auth;

import java.util.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class Test {

    public static void main(String[] args) throws ExecutionException, InterruptedException {

        ExecutorService service = Executors.newFixedThreadPool(5);
//        for(int i = 0;i < 5;i++){
//            service.execute(()->{
//                try {
//                    TimeUnit.SECONDS.sleep(5);
//                } catch (InterruptedException e) {
//                    e.printStackTrace();
//                }
//                System.out.println(Thread.currentThread().getName());
//            });
//        }
//        service.shutdown();
//
//        System.out.println(service.isShutdown());
//        System.out.println(service.isTerminated());
//        try {
//            TimeUnit.SECONDS.sleep(6);
//        } catch (InterruptedException e) {
//            e.printStackTrace();
//        }
//        System.out.println(service.isTerminated());

        Future<Integer> task = service.submit(()->{
           TimeUnit.MILLISECONDS.sleep(500);
           return 44;
        });
        System.out.println("sdf");

        System.out.println(task.isDone());
        System.out.println(task.isCancelled());
        TimeUnit.MILLISECONDS.sleep(1000);
        System.out.println(task.isDone());
        System.out.println(task.isCancelled());

        System.out.println(task.get());

//        FutureTask<Integer> task = new FutureTask<>(()->{
//            TimeUnit.MICROSECONDS.sleep(500);
//            return 1000;
//        });
//        Thread th = new Thread(task);
//        th.start();
//        System.out.println(task.get());
    }

}