多线程之Executors创建线程池

package com.lyon.juc.pool;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ThreadPoolDemo {
    public static void main(String[] args) {
        //不建议使用Executors去创建线程池，因为最大线程数是默认的Integer.MAX_VALUE   2的31次方-1（可能导致内存溢出）
        //ExecutorService executorService = Executors.newSingleThreadExecutor();//单个线程
        //ExecutorService executorService = Executors.newFixedThreadPool(5);//固定大小的线程池
        ExecutorService executorService = Executors.newCachedThreadPool();//可伸缩的

        try {
            for (int i = 0; i < 100; i++) {
                executorService.execute(()->{
                    System.out.println(Thread.currentThread().getName());
                });
            }
        }catch (Exception e) {
             e.printStackTrace();
        }finally {
            //线程池，使用完，要关闭
            executorService.shutdown();
        }
    }
}