Interface in java: Learn Interface in Java with examples

Learn Interface in Java with examples. Understand how interfaces support abstraction, multiple inheritance, and polymorphism in Java programming. 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 . An Interface in Java is an abstract type that defines a set of methods a class must implement. 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.