How to properly submit and get several Futures in the same Java stream?

I try to submit and get 10 Futures in the same stream. Each one takes 1 second to process and I would like to run them in parallel.

My first try is takes_10_sec() which runs sequentially and takes 10s.

My second try is takes_1_sec() which runs in parallel and takes 1s. However it uses an intermediate .collect(Collectors.toList()).stream() which I don't think is a good way to do it.

Is there another recommended way?

public class FutureStream {
    private ExecutorService executor = Executors.newFixedThreadPool(10);;

    @Test
    public void takes_10_sec() {
        IntStream.range(0, 10)
                .mapToObj(i -> longTask())
                .map(task -> {
                    try {
                        return task.get();
                    } catch (InterruptedException | ExecutionException e) {
                        throw new RuntimeException(e);
                    }
                })
                .forEach(System.out::println);
    }

    @Test
    public void takes_1_sec() {
        IntStream.range(0, 10)
                .mapToObj(i -> longTask())
                .collect(Collectors.toList())
                .stream()
                .map(task -> {
                    try {
                        return task.get();
                    } catch (InterruptedException | ExecutionException e) {
                        throw new RuntimeException(e);
                    }
                })
                .forEach(System.out::println);
    }

    private Future<String> longTask() {
        return executor.submit(() -> {
            Thread.sleep(1000);
            return Thread.currentThread().getName();
        });
    }
}