why we use interface as abstract class also doing same?
6853
Interface vs Abstract Class (general OO)
50083
Cast interface to its concrete implementation object or vice versa?
39482
Abstract, Interface, Classes OH MY - Question on Approach
7323
What is the point of interfaces in PHP?
141587
Is there any reason to declare optional parameters in an interface?
116081
How can I refer to the class type a interface is implementing in Java?
132020
Why nested abstract class in java
133457
Two interfaces with same method signature implemented in Java class
5245
When should I use an interface in java?
69594
What is the difference between an interface and abstract class?
92138
Is the C# "explicit implementation" of the interface present in Java?
15691
Interface vs Base class
150146
Final arguments in interface methods - what's the point?
21739
When to use abstract classes?
31188
In Java when one interface extends another, why would one redeclare a method in a subinterface?
38390
Is there more to an interface than having the correct methods
90035
Creating the instance of abstract class or anonymous class