Interface type mode

Overview

What exactly is an interface? In learning, object-oriented language programming, most of the video and book calls us to understand the interface as a ' USB ' interface, in fact, I think this is a bit misleading, since the Learning programming language, I think it should not stand in the user's position to consider the problem.

The interface of a class, in abstract, is a collection of methods and fields that allow objects of other classes to be accessed. In Java, the interface is promoted to a separate structure, embodying the separation of the interface (the commitment that the object must follow) and the implementation (how the object fulfills the promise).

　　

Interface type mode