Java 8 IntStream for an int range?

Question

Is there a way to create an IntStream for a range of ints?

Like if I wanted to stream values 1 to 1000, I could invoke some IntStream static factory to stream that range?

IntStream.forRange(1, 1000).forEach(//do something...

score 76 · Accepted Answer · answered Feb 04 '15 at 04:52

76

Never mind, I don't know why I missed it in the API documentation after reading it several times...

IntStream.range(1,1000)

answered Feb 04 '15 at 04:52

tmn

15

and `rangeClosed` if you want upper bounds to be inclusive. – Jean-François Savard Feb 29 '16 at 16:08
4

And add `.boxed()` if you want to map them to non-integers: `IntStream.rangeClosed(1, 10).boxed().map(i -> new User("username " + i)).collect(toImmutableList())` – Carl G Jul 10 '20 at 17:59
Or `.mapToObj()`: `IntStream.rangeClosed(1,10).mapToObj(i -> new User("username " + i)).toList();` – mskfisher Jun 17 '23 at 14:56

1 Answers1