Sub Classes

There is a possible by deriving a new class from the existing one. The new class will have the combined features of both the classes. Thus the real appeal and power of the inheritance mechanism is that it allows the programmer to reuse a class that is almost, but not exactly, what he wants, and to tailor the class in such a way that it does not introduce any undesirable side effects into the rest of the classes. In java, the derived class is known as ‘sub classes’. Note that each subclass defines only those features that are unique to it. Without the use of inheritance, each class would have to explicitly include all of its features.