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).

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).

We use the interface keyword to create an interface in Java. For example, public void getType(); public void getVersion(); Here, Language is an interface. It includes abstract methods: getType() and getVersion(). Like abstract classes, we cannot create objects of interfaces. To use an interface, other classes must implement it.

Jun 11, 2024 · In Java, an interface is an abstract type that contains a collection of methods and constant variables. It is one of the core concepts in Java and is used to achieve abstraction, …

Aug 29, 2023 · In this guide, learn everything you need to know about Interfaces in Java - why use them, how they're defined, static and default methods, best practices, naming conventions, functional interfaces, and multiple inheritance as well as interface inheritance.

In the Java programming language, an interface is a reference type, similar to a class, that can contain only constants, method signatures, default methods, static methods, and nested types.

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.

Let us first create an interface with the name Shape and then copy and paste the following code into it. As you can see, here, we created the interface with two methods (Area and Volume).

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.

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.