CompletedFuture with streams part 2

example.java

private static List<Integer> getIntegerList2(List<Integer> numbers) {
        return numbers
                .stream()
                .map(
                        number ->
                                CompletableFuture.supplyAsync(
                                        () -> getNumberCalculation(number),
                                        executor
                                )
                )
                .collect(Collectors.toList())
                .stream()
                .map(CompletableFuture::join)
                .collect(Collectors.toList());
}