Relation between package and a sub package in Java

Question

Can anyone please let me know the relation between a package and a sub package in java?

Thanks

Answer 1

There is no relation between them. package com.stackoverflow in java code just like com/stackoverflow in your operating system. I'm sorry,my English is poor,beg your parden.

Answer 2

There is no relation between packages and subpackages. It is just a hierarchical structure for the convenience of a developer and has no further meaning to Java itself.