Is there a fancy way to cast an Integer array to an int array? (I don't want to iterate over each element; I'm looking for an elegant and quick way to write it)
The other way around I'm using
scaleTests.add(Arrays.stream(data).boxed().toArray(Double[]::new));
I'm looking for an one-liner but wasn't able to find something.
The goal is to:
int[] valuesPrimitives = <somehow cast> Integer[] valuesWrapper
You can use Stream APIs of Java 8
int[] intArray = Arrays.stream(array).mapToInt(Integer::intValue).toArray();