Can an interface extend a class?

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. The interface declaration includes a comma-separated list of all the interfaces that it extends.

Can interface implement abstract class?

Interface can’t provide the implementation of an abstract class. Inheritance vs Abstraction: A Java interface can be implemented using the keyword “implements” and an abstract class can be extended using the keyword “extends”.

Can an interface extend a class C#?

An interface cannot extend a class but it can extend another interface in the same way that a class can extend another class. The extends keyword is used to extend an interface, and the child interface inherits the methods of the parent interface.

Can an interface extend a class Why?

No you can’t. An interface can extend another interface, but it can’t implement one. Only classes can implement interfaces.

Can an interface implement another interface?

An interface can extend any number of interfaces but one interface cannot implement another interface, because if any interface is implemented then its methods must be defined and interface never has the definition of any method.

Why interface is better than abstract class?

The short answer: An abstract class allows you to create functionality that subclasses can implement or override. An interface only allows you to define functionality, not implement it. And whereas a class can extend only one abstract class, it can take advantage of multiple interfaces.

Can interface extend multiple classes?

An interface can extend multiple interfaces. A class can implement multiple interfaces. However, a class can only extend a single class. Careful how you use the words extends and implements when talking about interface and class .

Can an interface extends a class just like a class implements interface?

Interfaces inherit even the private and protected members of a base class. This means that when you create an interface that extends a class with private or protected members, that interface type can only be implemented by that class or a subclass of it.

Can class extend multiple classes?

Extending a Class. A class can inherit another class and define additional members. We can now say that the ArmoredCar class is a subclass of Car, and the latter is a superclass of ArmoredCar. Classes in Java support single inheritance; the ArmoredCar class can’t extend multiple classes.

Which interface Cannot extend interface?

An interface is not extended by a class; it is implemented by a class. An interface can extend multiple interfaces.

Can interface inherit another interface?

Interfaces can inherit from one or more interfaces. The derived interface inherits the members from its base interfaces. A class that implements a derived interface must implement all members in the derived interface, including all members of the derived interface’s base interfaces.

Can we extend two abstract class java?

A: Java has a rule that a class can extend only one abstract class, but can implement multiple interfaces (fully abstract classes). There’s a reason why Java has such a rule.