Can we create body in interface if yes then how?

Yes, you can. If you implement an interface and provide body to its methods from a class. You can hold object of the that class using the reference variable of the interface i.e. cast an object reference to an interface reference.

Can an interface be instantiated can we create an object of an interface?

We can’t create instance(interface can’t be instantiated) of interface but we can make reference of it that refers to the Object of its implementing class. A class can implement more than one interface. A class that implements interface must implements all the methods in interface.

How do you create a reference object of an interface in Java?

A reference variable can be declared as a class type or an interface type. If the variable is declared as an interface type, it can reference any object of any class that implements the interface.

Why use an interface if you Cannot create an object from it?

We can’t create object of interfaces because of the reason that : Interface is basically a complete abstract class. So if we don’t have any implementation of a method then that means if we create object of that interface and call that method it compile nothing as there is no code to compile.

Can I create object of interface in Java?

No, you cannot instantiate an interface. Generally, it contains abstract methods (except default and static methods introduced in Java8), which are incomplete.

Can a Java interface implement another interface?

An interface can extend other interfaces, just as a class subclass or extend another class. However, whereas a class can extend only one other class, an interface can extend any number of interfaces.

Can we create objects of interface in Java?

Can we initialize interface Java?

You do not ‘initialize’ an interface. If you create a class that ‘implements’ an interface, you are creating a class that gives an implementation for every abstract method that is in that interface.

Can you create object of interface in Java?

Can we declare interface as final?

No, we can not declare interface as final . Interface in Java is similar to a class but it contains only abstract methods and fields, which are final and static . Since all the methods are abstract ; therefore, we cannot instantiate interface.

Can we create object of interface?