convert Long[] to long[] (primitive) java

Question

How do i convert Long[] to long[]? For example i know how to convert if it is not array as below.

long ll = (Long)Object[1].longValue()

But how

Answer 1

using java 8 streams:

public static long[] unboxed(final Long[] array) {
    return Arrays.stream(array)
                 .filter(Objects::nonNull)
                 .mapToLong(Long::longValue)
                 .toArray();
}