The convention is to write the domain name backwards, so it should be
nz.co.example.helloworld
This is explained in the Java tutorial.
Question
The typical case is that a package is prepended with a url, to prevent conflicts.
E.g. com.example.helloworld
What do you do with a multi-part TLD, e.g. co.nz?
Thoughts?
Solution
The convention is to write the domain name backwards, so it should be
nz.co.example.helloworld
This is explained in the Java tutorial.