Interface in java: In Java

In Java , an interface is a reference type similar to a class that can contain only constants, the method signatures, default methods, and static methods, and its Nested types. In interfaces , method bodies exist only for default methods and static methods. Writing an interface is similar to writing to a standard class. 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 . An Interface in Java is an abstract type that defines a set of methods a class must implement. 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.