How do I convert Double[] to double[]?

Question

I\'m implementing an interface that has functionality similar to a table that can contain an types of objects. The interface specifies the following function:

Answer 1

I would second the ArrayUtils answer and add that the 1.5 autoboxing documentation(via) kinda reveals that there is no builtin way:

There is no permitted conversion from array type SC[] to array type TC[] if there is no permitted conversion other than a string conversion from SC to TC