I thought of framing the question as (why the name for Interface is interface in Object Oriented Programming) :-). What ever, Just keep OOP aside and think what is an 'interface'?. What is the interface to your home/room/office?.
Interface is nothing but the way an object get exposed to the external world. That means you can play around with any object by its interface only. Now come to OOPs. U can play around with an object/class using its variables and its methods only(Is it Not?). Therefore interface to(of) a class is nothing but a its(class's) variables and method signatures.
Now come to Interface in OOPs..Afterall interface is also a class but it just consist only the variables and method signatures. Hence A class which just contains the details of its interface is called Interface.
Interface is nothing but the way an object get exposed to the external world. That means you can play around with any object by its interface only. Now come to OOPs. U can play around with an object/class using its variables and its methods only(Is it Not?). Therefore interface to(of) a class is nothing but a its(class's) variables and method signatures.
Now come to Interface in OOPs..Afterall interface is also a class but it just consist only the variables and method signatures. Hence A class which just contains the details of its interface is called Interface.
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