What is the benefit of interfaces when you still need to define each method body separately in each class that implements it?
855
What does it mean to "program to an interface"?
8789
Can anonymous class implement interface?
67671
What is the purpose of class methods?
69594
What is the difference between an interface and abstract class?
55032
Why do I need an IoC container as opposed to straightforward DI code?
41552
Do interfaces inherit from Object class in java
113976
Methods visibility in interface
85960
Abstract class vs Interface in Java
63715
What is the purpose for using an empty interface that extends another in Java?
32263
C# Interfaces. Implicit implementation versus Explicit implementation
110761
Class with single method -- best approach?
48266
How can I get a list of all the implementations of an interface programmatically in Java?
146553
Why an interface can not implement another interface?
134042
Why do many Collection classes in Java extend the abstract class and implement the interface as well?
50083
Cast interface to its concrete implementation object or vice versa?
149611
Java: Why are wrapper classes needed?
42596
Why would a static nested interface be used in Java?