> This is not a fun situation to deal with and inheritance makes it a lot harder because the "is a" relationship is driving a ton of your logic. Judicious OOP

> This is not a fun situation to deal with and inheritance makes it a lot harder because the "is a" relationship is driving a ton of your logic. Judicious OOP design allows others to change behavior based upon needs that perhaps the original coder never thought of. I would not call most Java OOP design judicious. The control in Java is owned by the library writers and the language devs -- not the people using it.