Interested to Buy Any Domain ? << Click Here >> for more details...
Can a class extend abstract class or interface? why
- 4 Answers
- 9839 Views
- Wipro, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / swapna
Yes, a class can extends an abstract class.A class can
implement an interface not to extend an interface.
In abstract class can consist method signature not method's
defenation. Through class we can define the methods
defenation by using public access specifier. In class we
can override the methods of abstract class by using public
access specifiers. Same think will happen in also interface
case . B'coz we cannot directly create object of abstract
class and interface.
Ex:
abstract class A
{
abstract void show();
}
class B extends A
{
public void show()
{
System.out.println ("Hello java");
}
}
public class AbstA {
public static void main (String[] args)
{
B b=new B();
b.show();
}
}
out put: Hello java
| Is This Answer Correct ? | 17 Yes | 1 No |
Answer / abhay bhatia
a class can extend an abstract class and can implement an
interface, why is because even though an abstract class
provide default implementation of its methods, we cannot
instantiate an object of the abstract class and therefore
need a class that extends it to use the instance methods of
this abstract class. An interface on the other hand cannot
even have default implementation, therefore it has to be
implemented to be used
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / mahesh
A class can extend an Abstract class but it can't extend an
interface.
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / ramakrishna
Yes, A class can extend an abstract class also any
interface,why because,A normal class which is implementing
an interface can still be declared as any abstract,if u
extend that class what happens?
u r extending an abstract class and indirectly extending
interface also.
| Is This Answer Correct ? | 1 Yes | 3 No |
What is nested interface?
What is fail first in java?
HOW TO PRINT A NO IN WORDS USING WHILE LOOP THE NO WILL BE PRINTED WHEN IT WILL BE IN THE RANGE BETWEEN 1 AND 3?
What are the two ways in which thread can be created?
What are the 4 types of research methods?
how can u handle run time exception in java? explain with brief explanation with examples?
In collection sorting comparable and comparator interface will be used..but why this two interfaces required..two will work same purpose so why there are two interfaces instead of one?when to use comparator and when to use comparable?
What is the difference between variable & constant?
what is domain object
we have two threads..both the threads are reading the data.. is there any need of synchronization there?...justify it?
How do you start a new line in java?
Can we define static methods inside interface?
Core Java 
