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Convergence: Facilitating Transdisciplinary Integration of Life Sciences, Physical Sciences, Engineering, and Beyond
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:
Interfaces form a contract between the class and the outside world, and this contract is enforced at build time by the compiler. If your class claims to implement an interface, all methods defined by that interface must appear in its source code before the class will successfully compile.
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 are declared using the interface keyword, and may only contain method signature and constant declarations (variable declarations that are declared to be both static and final).
Interfaces are connecting point between various devices and components, such as software, hardware, user interface, networking and more to exchange information and data.
In this chapter, we will learn how to define an interface, how to achieve abstraction and multiple inheritance using interfaces. What is Interface in Java? An interface is a blueprint of a class that contains static constants and abstract methods. Interfaces are used to achieve abstraction.