Compare an abstract class and an interface , JAVA Programming

You want the base class to represent only an interface for its derived classes. That means, you don't want anyone to actually instantiate an object of the parent class. You only want to upcast to it so that its interface may be used. This is accomplished by building that class abstract using the abstract keyword. If anyone tries to build an object of an abstract class, the compiler saves it.

 

The interface keyword makes this concept of an abstract class a step further by preventing any function or method implementation at all. You can only define a method or function but not give the implementation. The class, which is adding the interface, should give the actual implementation. The interface is a commonly and very useful used aspect in OO design, as it gives the implementation and separation of interface and actives you to:

 

1. Use similarities among unrelated classes without artificially forcing a class relationship.

2. Define methods that one or more classes are expected to implement.

3.  Reveal an object's programming interface without revealing its basic implementation.

4. Model multilevel interface inheritance in Java, which gives some of the benefits of full on multiple inheritances, a feature that some object-oriented languages support that allow a class to have more than one parented class.

 

 

155_Untitled.png

Posted Date: 7/25/2012 1:30:33 AM | Location : United States







Related Discussions:- Compare an abstract class and an interface , Assignment Help, Ask Question on Compare an abstract class and an interface , Get Answer, Expert's Help, Compare an abstract class and an interface Discussions

Write discussion on Compare an abstract class and an interface
Your posts are moderated
Related Questions
Prepare a Game in Corona for Android and IOS Project Description: We want to develop a game for mobile platform same as Zombie Smasher for iOS and Android. Everything is r

What is an Exceptions ? • What is an exception? • try-catch • finally • The different kinds of exceptions • Multiple catch clauses • The throws clause • Throwing excepti

List the precedence table? At last let's add the && , || , & , | and ? operators to the precedence table *, /, % Multiplicative operators +, - Additi

A preconfigured JMS object (a resource manager connection factory or a destination) formed by an administrator for the use of JMS clients and placed in a JNDI namespace

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Complete Back end and Front End Development Project Description: This work is a part of ongoing project. The need is to prepare and integrate the web part of this project.

Write a programme to create a webpage that prints the name of the STUDENT database in Wide Latin font and set the subtitle with description of the STUDENT to the screen. Set the pa

Object diagrams define instances instead of classes. They are useful for illustrating some complicated objects in detail about their recursive relationships.     When

Write HTML and JavaScript code which displays a textbox and button on a web page? While user enters text in the text box and clicks the button it displays in that text in the m

What is use of join in Java Threading