线程池的创建 Executors工具类

package com.Java;

import java.util.concurrent.*;

public class TestPool {
    public static void main(String[] args) {
        //创建服务 创建线程池
        ExecutorService service = Executors.newFixedThreadPool(3);

        service.submit(new MyPoll());
        service.submit(new MyPoll());
        service.submit(new MyPoll());
        //关闭服务
        service.shutdownNow();

    }
}
class MyPoll implements Callable {
    @Override
    public Object call() {
        System.out.println(Thread.currentThread().getName());
        return 1+2;
    }
}