Hi all.

I'm used to develop POJO's with simply private attributes and public assessor methods, even with inheritance involved.
This thins is, in the simple example of a POJO in the manual reference, i find public getters but i find:
- default setters (no modifier)
- protected setters (in child classes)
My question is, is there any optimizing or other reasons for this? I use inheritance all the time but i tend to place the whole "family tree" in the same package.

Thanks in advance for any replies.

Another question: I read in that same chapter: "A subclass must also observe the first and second rules.", whereas the second rule is "Implement a default constructor". But right below of it, the example of the DomesticCat has no constructor defined. Does it inherit the default constructor from its parent? Or does it have to be explicity defined?

Also, where can I get a sample mapping file for a child class? Is there any major differences?

Thanks once again.