返回来自Future / Stream的字符串列表

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class FutureStreamExample {
    public static void main(String[] args) throws ExecutionException, InterruptedException {
        // 使用CompletableFuture创建异步计算任务
        CompletableFuture<String> future1 = CompletableFuture.supplyAsync(() -> "Hello");
        CompletableFuture<String> future2 = CompletableFuture.supplyAsync(() -> "World");

        // 使用Stream将两个Future合并成一个列表
        List<CompletableFuture<String>> futures = Stream.of(future1, future2)
                .collect(Collectors.toList());

        // 等待所有异步任务完成，并将结果收集到列表中
        List<String> resultList = futures.stream()
                .map(CompletableFuture::join)
                .collect(Collectors.toList());

        System.out.println(resultList); // 输出: [Hello, World]
    }
}