An interface is a fully abstract class that helps in Java abstraction. In this tutorial, we will learn about interfaces in Java with the help of examples.

May 2, 2025 · The interface in Java is a mechanism to achieve abstraction. By default, variables in an interface are public, static, and final. It is used to achieve abstraction and multiple inheritance in Java. It supports loose coupling (classes depend on behavior, not implementation).

Another way to achieve abstraction in Java, is with interfaces. An interface is a completely " abstract class " that is used to group related methods with empty bodies: To access the interface methods, the interface must be "implemented" (kinda like inherited) by another class with the implements keyword (instead of extends).

Sep 11, 2022 · In this guide, we will cover what is an interface in java, why we use it and what are rules that we must follow while using interfaces in Java Programming. What is an interface in Java? Interface looks like a class but it is not a class.

Apr 29, 2025 · Learn declaration, features, uses, rules of interface in Java with example program, extending, implementing interface, interface variable

Apr 29, 2025 · Let’s understand the use of interface in Java with real-time examples. We will understand how Java interface concept is useful in real-time application and software development.

Nov 8, 2024 · In this tutorial, learn what is an Interface and how to implement Interface in Java with example program. Also know the difference between Class and Interface.

Feb 1, 2020 · Interface in Java is a bit like the Class, but with a significant difference: an interface can only have method signatures, fields and default methods. Since Java 8, you can also create default methods.

At the end of this article, you will understand what is Interface in Java is and its need as well as when and how to use the Interfaces in Java with Examples. Why do we need Interfaces in java?

Here is a simple program to declare an interface: An interface is defined much like a class. The general form of defining an interface is: type final- varName1 = value; // . . . . . . . .