ExecutorCompletionService示例代码需要循环吗？

import java.util.concurrent.*;

public class ExecutorCompletionServiceExample {
    public static void main(String[] args) {
        ExecutorService executor = Executors.newFixedThreadPool(5);
        ExecutorCompletionService<Integer> completionService = new ExecutorCompletionService<>(executor);

        // 提交任务
        for (int i = 0; i < 10; i++) {
            final int taskId = i;
            completionService.submit(() -> {
                // 模拟任务执行
                Thread.sleep((long) (Math.random() * 1000));
                return taskId;
            });
        }

        // 获取已完成的任务结果
        for (int i = 0; i < 10; i++) {
            try {
                Future<Integer> result = completionService.take();
                System.out.println("Task " + result.get() + " completed");
            } catch (InterruptedException | ExecutionException e) {
                e.printStackTrace();
            }
        }

        // 关闭ExecutorService
        executor.shutdown();
    }
}