Shulou(Shulou.com)05/31 Report--

Most people do not understand the knowledge points of this article "how to use CompletableFuture in java", so the editor summarizes the following content, detailed content, clear steps, and has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "how to use CompletableFuture in java" article.

Description

1. CompletableFuture class is introduced into JDK 8, and Future and CompletionStage interfaces are implemented.

Provides a series of methods for asynchronous programming, such as supplyAsync, runAsync, thenApplyAsync, and so on.

2. The function is to allow two or more operations to produce results.

Example

/ * @ author mghio * @ since 2021-08-01 * / public class CompletableFutureDemo {public static CompletableFuture doOneThing () {return CompletableFuture.supplyAsync (() -) > {try {Thread.sleep (2000);} catch (InterruptedException e) {e.printStackTrace ();} return "doOneThing";}) } public static CompletableFuture doOtherThing (String parameter) {return CompletableFuture.supplyAsync (()-> {try {Thread.sleep (2000);} catch (InterruptedException e) {e.printStackTrace ();} return parameter + "" + "doOtherThing";});} public static void main (String [] args) throws ExecutionException, InterruptedException {StopWatch stopWatch = new StopWatch ("CompletableFutureDemo"); stopWatch.start () / / Asynchronous execution version testCompletableFuture (); stopWatch.stop (); System.out.println (stopWatch);} private static void testCompletableFuture () throws InterruptedException, ExecutionException {/ / execute doOneThing task first, then doOtherThing task CompletableFuture resultFuture = doOneThing () .thenCompose (CompletableFutureDemo::doOtherThing); / / get task result String doOneThingResult = resultFuture.get () / / get the execution result System.out.println ("DoOneThing and DoOtherThing execute finished. Result = "+ doOneThingResult);}} the above is about the content of this article" how to use CompletableFuture in java ". I believe everyone has a certain understanding. I hope the content shared by the editor will be helpful to you. If you want to know more about the relevant knowledge, please follow the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.