oop « Super « Java Class Q&A

1. Good design: How use fields of superclass    stackoverflow.com

Possible Duplicate:
Java protected fields vs public getters

2. All super classes of a class    stackoverflow.com

I have class that extends to another class and that class extends to another class.

class 1 extends class 2 
class 2 extends class 3 
class 3 extends class 4 
class 4 ...