Sort primitive int array in reverse order in Java

How to sort primitive int array in reverse order

Arrays.sort() can not be used directly to sort primitive arrays in descending order.

You have to use Integer[] rather than int[].

Integer[] arr = new Integer[] {8, 4, 1, 7};
Arrays.sort(arr, Collections.reverseOrder());

If you still want to keep int[], there’s another way to approach it.

int[] nums = new int[] {8, 4, 1, 7};
int[] nums = IntStream.of(nums).boxed()
            .mapToInt(value -> value.intValue())
            .toArray(); // [8, 7, 4, 1]


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