Mar 28, 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).

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.

Why And When To Use Interfaces? 1) To achieve security - hide certain details and only show the important details of an object (interface). 2) Java does not support "multiple inheritance" (a class can only inherit from one superclass). However, it can be achieved with interfaces, because the class can implement multiple interfaces.

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.

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.

Jun 28, 2019 · Java interface is an abstract type that defines methods that classes must implement. It can contain constants, abstract method signatures, default methods along with an implementation body, static methods along with an implementation body, and nested types. Java Interface defines the “contracts” and represents the IS-A relationship.

Jan 11, 2025 · Learn declaration, features, uses, rules of interface in Java with example program, extending, implementing interface, interface variable

Mar 13, 2025 · This resource offers a total of 55 Java Interface problems for practice. It includes 11 main exercises, each accompanied by solutions, detailed explanations, and four related problems. [An Editor is available at the bottom of the page to write and execute the scripts.] 1. Write a Java program to create an interface Shape with the getArea () method.

Jul 21, 2017 · In this tutorial I will show you how to create and work with Java Interfaces. As always I will demonstrate a practical example of Java interface. What is Java Interface? As many other Java concepts, Interfaces are derived from real-world scenarios with the main purpose to use an object by strict rules.

In this Java tutorial, we will learn about Interfaces. We will also learn using interface in java with the help of an example. An interface is a blueprint of a class. Interfaces specify what a class must do but not how to do. An interface can have methods and variables just like a class.