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
Don''t know how to write this...can anyone help me?


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

Describe the Superclass in Inheritance ? In this example you start through defining a more common MotorVehicle class. public class MotorVehicle { private String licensePlat


Create a class to implement the ArrayList collection. The name should be YourFirstNameArrayList; for example if I were creating the class then I would call it WaynesArrayList. Do

Explain Labeled Loops in details ? Generally inside nested loops break and continue exit the innermost enclosing loop. For instance consider the subsequent loops. for (int i=1

What is the basic difference among Publish Subscribe model and P2P model? Ans) Publish Subscribe model is typically used in one-to-many situation. It is unreliable but very quic

how to write java programe and example programe

1. RUP is relying on a few important principles and philosophies like planning ahead, knowing where the process is capturing and heading the project in extensible and storable mann