Java – Convert an array of primitive longs into a List of Longs

arraysboxingcollectionsjava

This may be a bit of an easy, headdesk sort of question, but my first attempt surprisingly completely failed to work. I wanted to take an array of primitive longs and turn it into a list, which I attempted to do like this:

long[] input = someAPI.getSomeLongs();
List<Long> inputAsList = Arrays.asList(input); //Total failure to even compile!

What's the right way to do this?

Best Solution

Since Java 8 you can now use streams for that:

long[] arr = { 1, 2, 3, 4 };
List<Long> list = Arrays.stream(arr).boxed().collect(Collectors.toList());
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