Inheritance problems

Question

I'm trying to work out a problem with a project I'm working on that uses inheritance.
the superclass consists of a prebuild GUI using swing, when more then one class enherits from the superclass for some reason its like they are sharing the subclass, any changes to the GUI done in one subclass affects the other, so if I add a JScrollPane to the Container from the inherited class it stayes after the window is closed AND its there when the other subclass runs.
What I want is for both subclasses to have their own instances of the subclass, or in other words I don't want the changes done in one subclass to affect the other subclass, is this possible?
My best guess is that instead of getting their own copy of the subclass they are sharing the same one so when one subclass does any changes the other reflects those changes because they are working with the exact same instance of the superclass. I have an idea of what my problem is I just don't know how to stop it from hapening.

Answer 1

It seems to me you are very confused as to how your inheritance tree works and from your description there is a clear design fault. It may well be you are diasy-chaining your classes and have got design in a fart with logic and flow - ie:
class A{ // superclass
class B extends A{} // so if B is an application GUI
class C extends B{} // C gets messed up
class D extends C{} // and application GUI D gets knackered too
This type of design rarely works well (if at all). You need to literally go back to the 'drawing board' and consider what you're trying to do with good design principles.
I'm not sure anyone here can really help you with this unless you give a detailed description of what you're trying to do (not code), though from what I CAN gather it should be something like;-
class AllComponentsFrame{}
/* class AmendedComponentsFrame1 extends AllComponentsFrame{} // maybe? */
class FinalGUI1 extends AllComponentsFrame{}
class FinalGUI2 extends AmendedComponentsFrame1 {}