aspose file tools*
The moose likes Beginning Java and the fly likes asking about interface 2 Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Beginning Java
Bookmark "asking about interface 2" Watch "asking about interface 2" New topic
Author

asking about interface 2

kumar abhay
Ranch Hand

Joined: Oct 02, 2001
Posts: 53
Question v:-Why multiple inheritance is is possible by interface rather than inheritance(by extends keyword).what is the purpose of introducing interface.what is that which we can not do in inheritance but in interface
Question vi:-Interface can not be protected but only public .why?
Marilyn de Queiroz
Sheriff

Joined: Jul 22, 2000
Posts: 9052
    
  12
Question v:-what is that which we can not do in inheritance but in interface

It is rather a question of what problems are eliminated by using interface rather than multiple inheritance.

Superficially, multiple inheritance looks attractive. However, having multiple superclasses means inheriting the implementation of each, which is problematic. Resolving conflicts among the multiple implementations can be difficult or impossible. If you don't think it's complex, look at the virtual base classes in C++.


JavaBeginnersFaq
"Yesterday is history, tomorrow is a mystery, and today is a gift; that's why they call it the present." Eleanor Roosevelt
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: asking about interface 2