How do I convert a Java 8 IntStream to a List?

Eric Wilson :

I'm looking at the docs for the IntStream, and I see an toArray method, but no way to go directly to a List<Integer>

Surely there is a way to convert a Stream to a List?

Ian Roberts :

`IntStream::boxed`

IntStream::boxed turns an IntStream into a Stream<Integer>, which you can then collect into a List:

theIntStream.boxed().collect(Collectors.toList())

The boxed method converts the int primitive values of an IntStream into a stream of Integer objects. The word "boxing" names the int ⬌ Integer conversion process. See Oracle Tutorial.

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edited at2020-06-24

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