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
how to write coding for money and currency


Create a thread in either a C or a Java program and run it. The thread should read a keyboard value "x" and exit from the code, or it can also use an "ESC" to exit. That is, the t

I need Liferay Especialist Project Description: We want a JAVA + JSF + Portlets expert Liferay expertise is needed Big Data and Online Tools + Multilingual Portal & Websit

Java Remote Method Invocation (RMI): It gives a way for a Java program on one machine to interact with objects residing in different JVMs. The important blocks of the RMI arc

program for hinged beam


EJB 2.x is broadly adopted server side component architecture for J2EE. 1. EJB is a remote, distributed multi-tier system and allows protocols like IIOP, JRMP, and HTTP etc.

* Using a data structure to represent a set * Writing and using a checked exception * Extending the Exception class What should you upload via Blackboard? The files,

Java Is For Real Java has a lot of hype however much of it is deserved. Java is very well matched for many modern problems Using more CPU time and memory but less programmer