Answer Posted / 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

What is the purpose of final keyword and when to use it?

629

---

Can list be final in java?

585

---

What is immutable state?

603

---

What does t in java mean?

620

---

What are the four pillars of java?

737

---

---

Is it possible to define a method in java class but provide it’s implementation in the code of another language like c?

679

---

What does you mean in math?

633

---

What is factor r?

628

---

what is enumset?

673

---

What is a private class in java?

600

---

What is the method in java?

722

---

What are the 7 types of characters?

679

---

How are the elements of a gridbaglayout organized?

644

---

How does predicate work in java?

645

---

What is variable and example?

602

---