Difference between static nested class and regular class

Question

I know this is a bit of a duplicate question but I want to ask it in a very specific way in order to clarify a very important point. The primary question being: Is there any

Answer 1

ContainedStaticClass has package private (i.e. default) visibility and OutsideClass has public visibility.

You could have chosen to make ContainedStaticClass protected or private which were not options for OutsideClass.