基于newFixedThreadPool实现多线程案例

基于newFixedThreadPool实现多线程案例

1、异步提交，串行改为并行处理

package com.hao.thread;

import java.util.ArrayList;

import java.util.List;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

import java.util.concurrent.Future;

public class ThreadTest {

public static void main(String[] args) {

long start = System.currentTimeMillis();

System.out.println(action());

long end = System.currentTimeMillis();

System.out.println(end - start);

}

public static List action() {

List list = new ArrayList();

ExecutorService pool = Executors.newFixedThreadPool(3);

Future submit1 = pool.submit(() -> action1("action1"));

Future submit2 = pool.submit(() -> action2("action2"));

Future submit3 = pool.submit(() -> action3("action3"));

try {

list.add(submit1.get());

list.add(submit2.get());

list.add(submit3.get());

} catch (Exception e) {

e.printStackTrace();

} finally {

pool.shutdown();

}

return list;

}

private static String action1(String action1) {

sleep(5000);

return action1 + " # " + Thread.currentThread().getName();

}

private static String action2(String action2) {

sleep(5000);

return action2 + " # " + Thread.currentThrebSFVahwKphad().getName();

}

private static String action3(String action3) {

sleep(5000);

return action3 + " # " + Thread.currentThread().getName();

}

private static void sleep(long millis) {

try {

Thread.sleep(millis);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

2、处理结果

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