This page lists obscure records that should probably never have happened.
See How Deep is Your Hierarchy? for a tool on how to probe your jar files.
To win fame for discovering a deep open-source hierarchy, you have to reveal the project and the class that exceeds 9 levels. You may post anonymous submissions for the proprietary records. We will take your word for it.
Try to find the deepest package levels.
Record held by Martin Kuba, Supercomputing Center Brno, Czech Republic, for discovering 11 levels of package depth:
com sun jdo modules persistence mapping core ui wizard relationship RelationshipTablePanel
Would you like to receive our monthly Java newsletter, with lots of interesting tips and tricks that will make you a better Java programmer?