Interface in java: Learn how to use interfaces

Learn how to use interfaces to define the behavior of objects in Java . An interface is a group of related methods with empty bodies that a class can implement to promise certain functionality. Interfaces in Java Interface encourages abstraction (implementation not provided) and loose coupling, and allows multiple different types to be used interchangeably via the interface . Through interfaces , we can get polymorphism: as we can call interface methods on an object without knowing its concrete class, as long as it implements the interface . Learn what interfaces are in Java , how they are used to achieve abstraction, polymorphism, and multiple inheritances, and what methods and variables they can contain. See examples of interface inheritance, default methods, functional interfaces, and more. Explore interfaces in Java . Learn how to define and use interfaces for abstraction and multiple inheritance with practical examples.