Top "Interface" questions

Implement an Interface with Generic Methods

I'm drawing a blank on this one and can't seem to find any previous example that I wrote. I'm trying …

c# generics interface

Why can't I declare static methods in an interface?

The topic says the most of it - what is the reason for the fact that static methods can't be …

java interface methods static

Why does Eclipse complain about @Override on interface methods?

I have an existing project that uses @Override on methods that override interface methods, rather than superclass methods. I cannot …

java eclipse interface annotations syntax-error

Why are C# 4 optional parameters defined on interface not enforced on implementing class?

I noticed that with the optional parameters in C# 4 if you specify an optional parameter on an interface you don,…

c# .net c#-4.0 interface optional-parameters

Can an interface method have a body?

I know that an interface is like a 100% pure abstract class. So, it can't have method implementation in it. But, …

java interface java-8 default-implementation

Is there a way to create interfaces in ES6 / Node 4?

ES6 is fully available in Node 4. I was wondering whether it includes a concept of interface to define method contracts …

javascript node.js interface ecmascript-6

What is the point of interfaces in PHP?

Interfaces allow you to create code which defines the methods of classes that implement it. You cannot however add any …

php oop interface theory

IntelliJ IDEA jump from interface to implementing class in Java

Is there some shortcut that would allow me after creating method in an interface, select and jump to implementing class …

java class interface keyboard-shortcuts intellij-idea

How do Java Interfaces simulate multiple inheritance?

I am reading "The Java Tutorial" (for the 2nd time). I just got through the section on Interfaces (again), but …

java interface multiple-inheritance

Why are all fields in an interface implicitly static and final?

I am just trying to understand why all fields defined in an Interface are implicitly static and final. The idea …

java interface static final language-implementation