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Oct 4, 2024 · An Interface in Java programming language is defined as an abstract type used to specify the behavior of a class. An interface in Java is a blueprint of a behavior. A Java interface contains static constants and abstract methods.
The Java compiler adds public and abstract keywords before the interface method. Moreover, it adds public, static and final keywords before data members. In other words, Interface fields are public, static and final by default, and the methods are public and abstract.
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.
Interfaces. 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: Example Get your own Java Server.
Feb 1, 2020 · Interfaces 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.
Declaring an Interface in Java. The interface keyword is used to declare an interface. Here is a simple example to declare an interface −. Example to Declare a Java Interface. Following is an example of an interface − /* File name : NameOfInterface.java */ import java.lang.*;
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, polymorphism and multiple inheritances. Let’s see a simple example of an interface in Java:
