异步编程CompletableFuture系列2 计算结果进行消费

 代码

import java.util.concurrent.CompletableFuture;

public class Test2 {
    public static void main(String[] args) {
        System.out.println("first----------------");
            System.out.println(CompletableFuture.supplyAsync(()->{
                return "result";
            }).thenRun(()->{}).join());
        System.out.println("second---------------");
            System.out.println(CompletableFuture.supplyAsync(()->{
                return "result";
            }).thenAccept(System.out::println).join());
        System.out.println("third----------------");
            System.out.println(CompletableFuture.supplyAsync(()->{
                return "result";
            }).thenAccept(r-> System.out.println(r)).join());
        System.out.println("fourth----------------");
            System.out.println(CompletableFuture.supplyAsync(()->{
                return "result";
            }).thenApply(r->r+" AB").join());


    }
}

first----------------
null
second---------------
result
null
third----------------
result
null
fourth----------------
result AB