Why are interfaces useful?
Actually, I have a [small] idea of why interfaces are useful/necessary but…
What are [interesting or realistic] applications of interfaces?
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Why are interfaces useful?
Actually, I have a [small] idea of why interfaces are useful/necessary but…
What are [interesting or realistic] applications of interfaces?
Interfaces are interesting because you can allow 2 classes to implement the same methods. Lets look at an example.
Say I have a base class called Animal. All animals breathe, and communicate. Now lets say I have 3 classes, called Dolphin, Human, and Tiger. All of theses animals breathe and communicate. But I want to implement a walking method for the Human and Tiger. Dolphins cant walk. So I inherit the IWalk method for the latter two, and when I compile the class, I HAVE to implement the methods specified in the interface, or it won’t compile. It’s a contract saying, ‘If I want to implement this class, I have to implement these methods.’