Can a class extend abstract class or interface? why

Question Posted / venkateshkeerthi

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Can a class extend abstract class or interface? why..

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

Can a class extend abstract class or interface? why..

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

Can a class extend abstract class or interface? why..

Answer / mahesh

A class can extend an Abstract class but it can't extend an
interface.

Is This Answer Correct ?

2 Yes

0 No

Can a class extend abstract class or interface? why..

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

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