python vs java Threadpool

python 实现threadpool线程池管理：

from concurrent.futures import ThreadPoolExecutor as te
from concurrent.futures import ProcessPoolExecutor as pe
from concurrent.futures import wait
from concurrent.futures import FIRST_COMPLETED, ALL_COMPLETED, as_completed
import time
import os
import logging

logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s -\n %(message)s')

Executor_Service = te(max_workers=5)  # create a pool contains five workers  executor service
Executors_Service_P = pe(max_workers=os.cpu_count())  # create a pool contains max cpu count Process executor service


def test_fan(*k):
    """use *k 解包参数"""
    # logging.info(time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()) + " ->get result is:" + str(k)+"pid is %s"%os.getpid())
    time.sleep(sum(k) / 10)

    return k


if __name__ == '__main__':
    print("cur computer max cpu number is %s" % os.cpu_count())
    futures = []
    for i in range(10):
        list_test = [i, i + 1, i + 2]
        future = Executor_Service.submit(test_fan, *list_test)
        futures.append(future)
    Executor_Service.shutdown()  # shutdown  pool
    results = []
    for f in futures:
        if f.done():  # bool type
            results.append(f.result())
    print(f"get result of all : {results}")
    # part2 演示ALL_COMPLETED
    wait(futures, timeout=10, return_when=ALL_COMPLETED)
    # 问题：上面虽然提供了判断任务是否结束的方法，但是不能在主线程中一直判断啊\
    # TODO如何实现一有任务结束就立马返回结果呢：借助as_completed
    for f in as_completed(futures, timeout=10):
        print(f.result())

　　java 实现线程池管理：

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class MyExecuter implements  Runnable{

    private  int i=0;
    @Override
    public  void run(){
        while (i<10) {

            SimpleDateFormat strf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式
            String d = strf.format(new Date());// new Date()为获取当前系统时间
            System.out.println(d+"  "+Thread.currentThread().getName());
            i++;
        }
    }

    public static void main(String[] args) {
        ExecutorService  pool   = Executors.newFixedThreadPool(5);
        for (int i = 0; i <10; i++) {
            pool.submit(new MyExecuter());
        }

        pool.shutdown();  //shutdown all task  wait all task finish ，not longer recv  new task ,shutdownNow 立即关闭线程池
    }
}