This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
If a class has abstract method/s it must be declared abstract. The implementation of the method may be provided in the subclass. Ok!!! But is it that I MUST AND MUST have the subclass. I know it isnt wise but what if I dont extend a thing from it? :-/
Its No problem if u dont have a subclass for a abstract class. But if you extend from a abstract class, the subclass must either give the implementation for all the abstract methods of the parent class or else ,the subclass should also be declared as abstract. Inform me if i misunderstood your question..