Return stream from array as int[] instead of Integer[] [duplicate]

Question

I have this array:

Integer[] originalItems = itemsArray.stream()
            .distinct()
            .sorted()
            .toArray(Integer[]::new);

I would like to return it as int[] rather than as Integer[].

I have tried to call .toArray(int[]::new) but I get this error:

no instance(s) of type variable(s) A exist so that int[] conforms to A[]

Andrew · Accepted Answer · 2020-04-13 12:47:30Z

6

.mapToInt(Integer::intValue).toArray();

instead of

.toArray(Integer[]::new);

because

<A> A[] toArray(IntFunction<A[]> generator);

doesn't work with primitive types.

answered Apr 13, 2020 at 12:47

Andrew

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