Difference between abstract class and Interfaces in Java
Answers were Sorted based on User's Feedback
Answer / surendrareddy
abstract clas have both abstract methods and Concrete methods.
but interface have only abstract methods,
And also abstract class have construtor,but interface
doesn't have.
Is This Answer Correct ? | 48 Yes | 9 No |
Answer / guest
abstract classes can have other concrete methods but
inteface only abstract methods.
Is This Answer Correct ? | 35 Yes | 4 No |
Answer / manish sharma
Abstract classes Interfaces
Abstract classes are used only when there is a “is-a” type
of relationship between the classes. Interfaces can be
implemented by classes that are not related to one another.
You cannot extend more than one abstract class. You can
implement more than one interface.
Abstract class can implemented some methods also.
Interfaces can not implement methods.
With abstract classes, you are grabbing away each class’s
individuality. With Interfaces, you are merely extending
each class’s functionality.
Is This Answer Correct ? | 24 Yes | 4 No |
Answer / your friend
abstract classes can have any type of medthods but
interface allows only abtract methods.
Interface is like a class not a class .
Is This Answer Correct ? | 19 Yes | 8 No |
Answer / venkateswarlu dhaninkula
Interfaces consists of pure abstract methods
but not abstract class
abstract class having both abstract methods and non
abstract methods
interfaces declare all variables are final and public
but not abstract class
abstract class has a default constructor
but not interface
Is This Answer Correct ? | 8 Yes | 1 No |
Answer / megha mokawat
Abstract class can have non-final variable aslo
but in interface variable are final by- default
Is This Answer Correct ? | 8 Yes | 2 No |
Answer / narasimha raju
An abstract classes can have concrete methods and declares
abstract method which method can implement in different
ways. whereas in interface all are abstract methods.
in abstract class we can declare any type of variable
but in interface all are final variables.
Is This Answer Correct ? | 8 Yes | 5 No |
Answer / krishna
In Abstract class should implementation methods information
with complete i.e Programmer duty .
But in Interfaces we can give implementations to End-User .
Is This Answer Correct ? | 0 Yes | 0 No |
How to connect the .accdb database file of microsoft access to the Visual Basic 6.0 forms?
write a sql qwery which include joining of two tables 4 marks mainframe
why we use static with only main()class not with other class
what is difference between java and c#
What is the difference between in-proc and out-of-proc?
What sysoption determines where the macro facility searches a specific catalog for complied macro?
how can i create report in abap to insert data in table pa0002 using insert command
How to merge Action Form with Dyna Action Form in Struts.
how to study PHP my own? i reffered many sites.. but as being a fresher i couldnt follow those... which site will be the best one?
What is the difference between CriteriaQuery and CreateQuery in Hibernate???? Thanks in advance!!!!!!
Diff between Proc transpose and Arrays with example?
How to print No.of.rows affected after updation using ADO.Net