Solved: How to convert int[] into List in Java?


How do I convert int[] into List<Integer> in Java?
Of course, I’m interested in any other answer than doing it in a loop, item by item. But if there’s no other answer, I’ll pick that one as the best to show the fact that this functionality is not part of Java.

Best Answer:


  1. In Java 8+ you can make a stream of your int array. Call either or IntStream.of.
  2. Call IntStream#boxed to use boxing conversion from int primitive to Integer objects.
  3. Collect into a list using Stream.collect( Collectors.toList() ). Or more simply in Java 16+, call Stream#toList().

In Java 16 and later:

If you have better answer, please add a comment about this, thank you!