Issue
I've realized that the Eclipse IDE puts all packages in a project (at least in a Java one) at the same level, e.g.:
However, browsing the file system, you can find that packages are treated in the expected multi-leveled way. Does this have any logical explanation?
Solution
This is just a presentation feature. You can click on the little down arrow you see on the left of your screen shot and select Package Presentation
-> Hierarchical
to have it like your filesystem.
You can see this answer for more information.
Answered By - benzonico