Inheritance, implementing inheritance, interface inheritance, JAVA Programming

 

Inheritance - is the inclusion of state and behavior of a base class in a derived class so that they are accessible in that derived class. The key benefit of Inheritance is that it gives the formal mechanism for

code reuse. Any shared piece of business logic may be moved from the derived class into the base class as part of refactoring method to improve maintainability of your code by avoiding code duplication. The existing class is called the superclass and the derived class is defined the subclass. Inheritance may also be illustrate as the process whereby one object requires characteristics from one or more other objects the similar way children accepts characteristics from their parents. There are basically two types of inheritances:

 

1. Implementation inheritance: You will extend an application's functionality by reusing functionality in the parent class by extending all or some of the operations already implemented. In Java, you can only add from one superclass. Implementation inheritance promotes reusability but improper use of class inheritance can gives programming nightmares by dividing encapsulation and building future changes a problem. With implementation inheritance, the subclass becomes hardly coupled with the superclass. This will build the design fragile because if you need to change the superclass, you have to know all the details of the subclasses to avoid breaking them. So when using implementation inheritance, make sure that the subclasses relay only on the nature of the superclass, not on the actual implementation.

 

2. Interface inheritance: That is also known as subtyping. Interfaces give a mechanism for specifying a relationship between otherwise unrelated classes, typically by specifying a set of common methods each implementing class must obtain. Interface inheritance provides the design concept of program to interfaces not to implementations. This also reduces implementation dependencies or the coupling between systems. In Java, you will implement any number of interfaces. This is more flexible and reliable than implementation inheritance because it won't restrict you into specific implementations which build subclasses difficult to maintain. So care could be taken not to divide the implementing classes by modifying the interfaces.

 

Posted Date: 7/25/2012 1:04:59 AM | Location : United States







Related Discussions:- Inheritance, implementing inheritance, interface inheritance, Assignment Help, Ask Question on Inheritance, implementing inheritance, interface inheritance, Get Answer, Expert's Help, Inheritance, implementing inheritance, interface inheritance Discussions

Write discussion on Inheritance, implementing inheritance, interface inheritance
Your posts are moderated
Related Questions
Describe life cycle of thread. Threads follow the single flow of control. A thread is execution in a program. The life cycles of threads are listed below: Newborn state: A

how to write method overriding and example programe

The while statement define a loop that iterates as long as condition remains true. In the following instance the control waits till the value of a text field becomes "go":

It helps to resolve naming conflicts when different packages have classes with the same names. This also helps you prepare files within your project. As define : java.io package d

In this assignment, you are provided with an interface that contains a generic type. You are asked to create two classes that implement this interface. A. The Sequenced Interfac

I want five page website design Project Description: Five page website CMS Front end design Skills required are Graphic Design, Java, HTML, PHP, Website Design

The == gives true, if the variable reference points to the similar types of object in memory. That is a " shallow comparison ".   The equals () - gives the results of run

An application or procedure that produces and/or receives messages.

New Fishing App Project Description: A new app for iPhone providing a GPS connected map of the fishery you are fishing at and other logged in users who are also fishing at th

I want to develop a Chat application for j2me Project Description: We require a chat application for a community website. Skills required: Java, J2ME