Is there an equivalent to Python's List Comprehension in Java

Question

I have this Java class called MyObject and I want to instantiate a ArrayList/array of 50 non-null MyObject elements in one line.

So in Python that would be something like:

_list = [MyObject() for i in range(50)]

Any ideas are greatly appreciated.

`IntStream.range(0, 50).mapToObj(i -> new MyObject()).collect(toList())`. — Andy Turner, Aug 05 '20 at 21:27
`Stream.generate(MyObject::new).limit(50).collect(toList())`. — Andy Turner, Aug 05 '20 at 21:28
`List list = new ArrayList<>(); for (int i = 0; i < 50; ++i) list.add(new MyObject());` (it's one line... one-liners are overrated.) — Andy Turner, Aug 05 '20 at 21:29
Possible duplicate of https://stackoverflow.com/questions/899138/python-like-list-comprehension-in-java? — user, Aug 05 '20 at 21:30
@AndyTurner feels like you should just turn those two into an answer so it can be marked as the right one :) — rzwitserloot, Aug 06 '20 at 00:04

score 0 · Answer 1 · answered Aug 05 '20 at 22:25

0

A solution for plain arrays could look like this (not a one liner though):

MyObject[] arr = new MyObject[50];
Arrays.setAll(arr, index -> new MyObject());

answered Aug 05 '20 at 22:25

noIdeaAtAll

1 Answers1