what is difference between Interface and abstract class
- 2 Answers
- 4309 Views
- GCPL, I also Faced
- E-Mail Answers
Answer Posted / surender kannuri
interface is a specification of method prototype.
all methods in interface are abstract and final.
interface methods are public since they should be available
to third party vendor to provide implementation.they are
abstract because their implementation is left for third
party vendors.
interface contains 0 or more abstract methods.
all methods of interface should implemented in implemented
class.if any method is not implemented then implementation
class should be declared as abstract.
we can't create object to interface.but we can create
reference to interface type.
an interface contains variables ,such as public.static and
final variables.this means all variables of interface are
constant.
an interface cannot implements another interface.
an interface can extend another interface.
it is possible to write a class within an interface.
a class can implements(not extend) multiple interfaces.
abstract class contains 0 or more abstract methods.
all methods of abstract class should be implemented in
subclasses only.
all methods of abstract class should be declared by using
abstract keyword.
we can't create an object to abstract class.
| Is This Answer Correct ? | 1 Yes | 1 No |
Post New Answer View All Answers
What will happen when using pass by reference in java?
What is namespace in java?
Is ++ operator is thread safe in java?
how we can create packages in java?
Give a practical example of singleton class usage?
What is meant by 'bit masking' in java?
Is null function in java?
What is method overriding in java ?
What is the difference between superclass and subclass?
How do you sort a string in alphabetical order in java?
What are annotations in java?
How java is similar to c?
What is the full form of jpeg?
What is identifier with example?
Difference between character constant and string constant in java ?
