Integer vs int: with regard to memory

Question

I was wondering if there is a difference in the memory occupied by Integer n, and int n.

I know int n occupies 4 bytes normal

Answer 1

For int: 4 bytes used per element without wrappers, and 16 per element with a wrapper.

A wrapped double reports as 24 bytes per element, with the actual double value as 64 bits (8 bytes).

For more details here