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  1. Java Interface - W3Schools

    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:

  2. Java Interface - GeeksforGeeks

    Oct 10, 2025 · An Interface in Java is an abstract type that defines a set of methods a class must implement. An interface acts as a contract that specifies what a class should do, but not how it …

  3. What Is an Interface? (The Java™ Tutorials > Learning the ...

    Methods form the object's interface with the outside world; the buttons on the front of your television set, for example, are the interface between you and the electrical wiring on the other …

  4. What Is an Interface in Java? A Complete Guide with Example ...

    In the realm of Java programming, an interface plays a fundamental role as a blueprint or a contract for classes. Unlike classes, which can contain fully implemented methods and state, …

  5. Java Interfaces - Baeldung

    Jul 23, 2025 · 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, …

  6. Interface (Java) - Wikipedia

    Interfaces are used to encode similarities which the classes of various types share, but do not necessarily constitute a class relationship. For instance, a human and a parrot can both …

  7. Understanding Java Interfaces: Concepts, Usage, and Best ...

    Jul 21, 2025 · In the Java programming language, interfaces play a crucial role in enabling the concept of abstraction and providing a way to achieve multiple inheritance in a controlled …