Chandra kumar

• May 26th, 2006

 

Abstract Class - Blue print of class

Interfaces - Only implemented members, such as  property,index,methods,events

Ashishtandon.e

 Profile Answers by Ashishtandon.e 

• May 27th, 2006

 

Abstract classes can not be instantiated it can have or cannot have abstract method basically known as mustinherit as the methods are static in nature

where interfaces are the declaration and r defined where they are called used for dynamic methods

rekhs

• Jun 12th, 2006

 

Hai,

     Abstract class: It can't be instantiated.Some methods may abstract. It can't be implemented. It bis the blueprint of the class.

Interface: It can be instantiated.All the methods should be abstract. it can be implemented

debiprosad lahiri

• Jun 19th, 2006

 

Abstract class is a class which can only be inherited by a subclass whereas in an interface only some signatures will be provided. In case of interface the class that will implement this must write code against each methods / functions. Interface can inherit other interface only where an abstract class can inherit other classes . When my base class will be used by more than one group of user and they all might not use all the methods that my class will provide in that case we should go for an abstract class rather than an interface.

Public MustInherit class A

Interface A

venkat

• Jul 28th, 2006

 

1.We can't create instances for both

2.Single inheritance in abstract class, multible inheritance in interface

3.We can have concrete method in abstact class but not in the interface.

4.Any class that needs to use abstract must extent

5.Any class that needs to use interface must implement

5.Interface all the variables are static and final.

diksha

• Sep 22nd, 2006

 

abstract classes can have some methods dclared only not defined,these methods are later definedin classes that will inherit abstract class

interface will have no method defined,methods are only declared they are defined in class which implements interface

interface is implemented

abstract class is inherited

praveenoruganti

• Oct 16th, 2006

 

interface is nothing but no functionality with some definition in it.

Leelakrishnan

• Feb 2nd, 2007

 

Hi, Inferface can be used as a contract for other classes.

biswo123

 Profile Answers by biswo123 

• Dec 8th, 2008

 

- Abstract class contains one or more incomplete methods while an interface contains only the signatures of all the methods.