All Interface Solutions on Gang of Coders

Total of 229 Interface Solutions

Explicitly calling a default method in Java

Java Inheritance Interface Java 8 Default Method

Should methods in a Java interface be declared with or without a public access modifier?

Java Interface Coding Style Public Method

Does Typescript support "subset types"?

Interface Typescript

Why are interface variables static and final by default?

Structs, Interfaces and Boxing

C#Struct Interface Value Type Boxing

X does not implement Y (... method has a pointer receiver)

Pointers Go Methods Interface

Interfaces — What's the point?

C#.Net Interface

Why can't I seem to grasp interfaces?

Force a class to override the .equals method

Java Interface Overriding Equals Requirements

PHP: Can I Use Fields In Interfaces?

How can interfaces replace the need for multiple inheritance when have existing classes

Java Inheritance Interface Multiple Inheritance

Why is it illegal to have a private setter on an explicit getter-only interface implementation?

C#Inheritance Interface Explicit Interface

Why can't the interface be implemented with pointer receivers

Pointers Interface Go

Typescript optionally extending interface

Javascript Typescript Interface

Generic Interface

Why do I get an error instantiating an interface?

C#Oop Class Interface Instantiation

Is it possible to pass derived classes by reference to a function taking base class as a parameter

How can I make a method private in an interface?

ifconfig and interfaces

Macos Interface Ip Ifconfig

Interface extends another interface but implements its methods

Java Interface Extends Implements

Java generics - Make Generic to extends 2 interfaces

Java Class Generics Interface

Interfaces and async methods

C#Interface Async Await

Can we use static method in an abstract class?

Java Interface Static Abstract

Default implementation of a method for C# interfaces?

C#Oop Interface

Why declare an interface as abstract?

Java Oop Interface

Is "public static final" redundant for a constant in a Java interface?

Java Interface Static Final Jls

How can I move EC2 instances to a different subnet?

Networking Interface Amazon Ec2

Abstract class in Java

Java Oop Interface Abstract Class

Why does Java not allow multiple inheritance but does allow conforming to multiple interfaces with default implementations

Java Inheritance Interface Java 8 Abstract

Generate interface from solid class file in Eclipse

Eclipse Interface Eclipse Plugin Eclipse Cdt

What's the Python version for “Code against an interface, not an object”?

Python Oop Interface Inversion of-Control

C# internal interface with internal implementation

C#Interface Internal

Best way to declare an interface in C++11

C++Interface C++11 Polymorphism Abstract

C# Interface Inheritance to Abstract class

C#Oop Interface Abstract Class Concrete

What's the difference between an abstract class and an interface?

C#Oop Interface Abstract Class

Implementing two interfaces in a class with same method. Which interface method is overridden?

Java Interface Overriding

Why can't C# interfaces contain fields?

What is the point of interfaces in PHP?

Php Oop Interface Theory

Why would a static nested interface be used in Java?

Java Interface Static

Multiple Inheritance in C#

C#Interface Multiple Inheritance

When to use Interface and Model in TypeScript / Angular

Angular Typescript Class Interface

How do you find all subclasses of a given class in Java?

Java Class Interface Subclass

Java abstract interface

Java Interface Abstract

How will I know when to create an interface?

Design Patterns Oop Interface Class Design

What does it mean to "program to an interface"?

Language Agnostic Oop Interface

Final arguments in interface methods - what's the point?

Java Class Interface Methods Final

How does interfaces with construct signatures work?

Typescript Constructor Interface

How do you declare an interface in C++?

C++Inheritance Interface Abstract Class Pure Virtual

How can I use interface as a C# generic type constraint?

C#Generics Interface Constraints

IntelliJ IDEA jump from interface to implementing class in Java

Java Class Interface Keyboard Shortcuts Intellij Idea

Interface vs Base class

Oop Interface Language Agnostic Base Class Static Typing

Why is there no multiple inheritance in Java, but implementing multiple interfaces is allowed?

Java Oop Inheritance Interface Language Design

Checking if an instance's class implements an interface?

Php Interface Oop

How to make a Java class that implements one interface with two generic types?

Java Generics Interface Multiple Inheritance

Implements vs extends: When to use? What's the difference?

Java Inheritance Interface Extends Implements

Custom fonts and XML layouts (Android)

Java Android User Interface Interface Fonts

What does "program to interfaces, not implementations" mean?

Oop Design Patterns Interface Software Design Ooad

Do interfaces inherit from Object class in java

Java Inheritance Interface

How do you implement a private setter when using an interface?

C#asp.net Interface Getter Setter

Is there more to an interface than having the correct methods

Java Oop Language Features Interface

Constructor in an Interface?

"<type> is pointer to interface, not interface" confusion

Pointers Go Interface

Polymorphism: Why use "List list = new ArrayList" instead of "ArrayList list = new ArrayList"?

Java List Interface Polymorphism

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

Java Interface Methods Static

Can extension methods be applied to interfaces?

C#.Net Interface Extension Methods

Java8: Why is it forbidden to define a default method for a method from java.lang.Object

Java Interface Java 8 Default Method

In C#, can a class inherit from another class and an interface?

C#Class Inheritance Interface Components

What is the use of interface constants?

Java Interface Constants

Why would one declare a Java interface method as abstract?

Java Eclipse Interface Abstract

Inherit from a generic base class, apply a constraint, and implement an interface in C#

C#Generics Inheritance Interface Constraints

C# Interfaces. Implicit implementation versus Explicit implementation

C#.Net Interface

How to determine if a type implements an interface with C# reflection

C#Reflection Interface

C#: Abstract classes need to implement interfaces?

C#Syntax Interface Abstract Class

Comment the interface, implementation or both?

C#Java Comments Interface

Jump into interface implementation in Eclipse IDE

Eclipse Interface Polymorphism

How to check if an object implements an interface?

Java Oop Interface

Interfaces vs. abstract classes

C#Inheritance Interface Abstract Class

Protected in Interfaces

Go Interface Fields

Struct Interface Go

What is the definition of "interface" in object oriented programming

Oop Interface Definition

Why does Eclipse complain about @Override on interface methods?

Java Eclipse Interface Annotations Syntax Error

What is the purpose of the default keyword in Java?

Java Interface Java 8 Default

When use a interface or class in Typescript

Typescript Class Interface Strong Typing

Cast object to interface in TypeScript

Object Typescript Interface Casting

Why an abstract class implementing an interface can miss the declaration/implementation of one of the interface's methods?

Java Interface Abstract Class

Find Java classes implementing an interface

Cast List<T> to List<Interface>

C#.Net Interface Casting

When to use: Java 8+ interface default method, vs. abstract method

Java Interface Java 8 Abstract Class Default Method

Type List vs type ArrayList in Java

Java List Interface Decoupling

Optional Methods in Java Interface

Java Methods Interface

Difference between abstract class and interface in Python

Python Interface Abstract Class

Interface defining a constructor signature?

C#Interface Constructor

What is the difference between static and default methods in a Java interface?

Java Java 8 Interface

How can I implement static methods on an interface?

C#.Net Interface

Java's Interface and Haskell's type class: differences and similarities?

Java Haskell Interface Typeclass

Why implement interface explicitly?

Is it possible to use getters/setters in interface definition?

Interface Get Set Accessor Typescript

What is the difference between an interface and a class, and why I should use an interface when I can implement the methods directly in the class?

C#Class Oop Interface Abstraction

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

Javascript node.js Interface Ecmascript 6

What is java interface equivalent in Ruby?

Why are C# interface methods not declared abstract or virtual?

C#Methods Interface Abstract Virtual Functions

Why java classes do not inherit annotations from implemented interfaces?

Java Inheritance Interface Annotations

How to extend a class in python?

Python Class Interface

Difference between interfaces and classes in Typescript

Angular Typescript Class Interface Model

Should Javadoc comments be added to the implementation?

Java Interface Comments Javadoc

Why can't I define a static method in a Java interface?

Java Interface Static Methods

The difference between the Runnable and Callable interfaces in Java

Java Multithreading Interface Runnable Callable

Abstract Class vs Interface in C++

C++Interface Abstract Class

Inner class within Interface

Java Oop Interface Inner Classes

Pros and Cons of Interface constants

Php Interface Constants

how to implement Interfaces in C++?

C++Interface Concept

How should I have explained the difference between an Interface and an Abstract class?

Java Oop Inheritance Interface Abstract Class

Why an interface can not implement another interface?

Java Oop Inheritance Interface

Abstract class vs Interface in Java

Java Design Patterns Interface Abstract Class

Is it safe for structs to implement interfaces?

C#Interface Struct

Why static classes cant implement interfaces?

C#.Net Interface Static Classes

What's the difference between IComparable & IEquatable interfaces?

C#Interface Icomparable Iequatable

How do arrays in C# partially implement IList<T>?

C#.Net Arrays List Interface

Interface type check with Typescript

Javascript Typescript Interface

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

Java Interface Static Final Language Implementation

How to add a delegate to an interface C#

C#Interface Delegates

When to use an interface instead of an abstract class and vice versa?

Oop Inheritance Interface Abstract Class

What is the purpose of a marker interface?

C#Interface Class Design

What does an underscore and interface name after keyword var mean?

Syntax Interface Go Underscores

What is the "default" implementation of method defined in an Interface?

Java Interface Java 8

How can I get a list of all the implementations of an interface programmatically in Java?

What's the difference between HashSet and Set?

Java Interface Set

When is an interface with a default method initialized?

Java Interface Java 8 Default Method

PHP 7 interfaces, return type hinting and self

Php Interface Return Type Php 7 Type Hinting

C# - Cannot implicitly convert type List<Product> to List<IProduct>

C#Interface Compiler Errors

Should we @Override an interface's method implementation?

Java Oop Interface Annotations

Why no static methods in Interfaces, but static fields and inner classes OK? [pre-Java8]

Java Interface Jls

Java - Method name collision in interface implementation

Java Interface Multiple Inheritance Composition

How to define interfaces in Dart?

Oop Inheritance Dart Interface

Understanding Covariant and Contravariant interfaces in C#

C#.Net Interface Covariance Contravariance

When do I have to use interfaces instead of abstract classes?

Java Oop Inheritance Interface Abstract Class

The 'instanceof' operator behaves differently for interfaces and classes

Java Class Inheritance Interface Instanceof

Should interfaces be placed in a separate package?

Java Interface Packages

How to find which classes implement a particular interface in Eclipse?

Java Eclipse Interface

Why PHP Trait can't implement interfaces?

Php Oop Interface Traits

What is the difference between an interface and abstract class?

Oop Interface Abstract Class

Is the compiler treatment of implicit interface variables documented?

Delphi Interface Delphi 2010

Are defaults in JDK 8 a form of multiple inheritance in Java?

Java Interface Closures Multiple Inheritance Java 8

Is there any ready-made calendar control for iPhone apps?

Iphone Cocoa Touch Interface Uikit Calendar

Difference between @interface definition in .h and .m file

Objective C Interface Header Files Setter Getter

How to Implement IComparable interface?

C#Interface Icomparable

When should I choose inheritance over an interface when designing C# class libraries?

C#Oop Design Patterns Inheritance Interface

Attributes / member variables in interfaces?

Abstract classes vs. interfaces vs. mixins

Oop Interface Terminology Abstract Class Mixins

MOQ - how to mock an interface that needs to be cast to another interface?

Unit Testing Inheritance Interface Moq

How to write junit tests for interfaces?

Java Unit Testing Testing Interface Junit

A difference in style: IDictionary vs Dictionary

C#Java .Net Interface

Can an interface method have a body?

Java Interface Java 8 Default Implementation

Is it possible to have an interface that has private / protected methods?

Php Oop Interface

Can we create an instance of an interface in Java?

Java Interface Instance Inner Classes Anonymous Class

not implementing all of the methods of interface. is it possible?

Java Interface Abstract Class

Typescript Function Interface

Interface Typescript

Why can't I have protected interface members?

C#Interface Protected Access Modifiers

Why do we use Interface? Is it only for Standardization?

Oop Interface Ooad

Why should the interface for a Java class be preferred?

Java Collections Interface

Do PHP interfaces have properties?

Php Oop Interface Methods

Is returning IList<T> worse than returning T[] or List<T>?

C#.Net Interface Abstraction

When to use mixins and when to use interfaces in Dart?

Oop Interface Dart Abstract Class Mixins

Why Explicit Implementation of a Interface can not be public?

Why to use Interfaces, Multiple Inheritance vs Interfaces, Benefits of Interfaces?

Java Oop Inheritance Interface Multiple Inheritance

Java casting in interfaces

Java Interface Casting

Is it possible to inject interface with angular2?

Interface Angular Inject

Why would I want to use Interfaces?

implicit vs explicit interface implementation

C#.Net Interface

Java Reflection: Create an implementing class

Java Reflection Interface

Interfaces vs Types in TypeScript

Typescript Interface Typescript Types

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

C#.Net C# 4.0 Interface Optional Parameters

Jquery ui - sortable: drag by icon 'handle' within sortable element

Jquery Ui User Interface Interface Web Jquery Ui-Sortable

Is it possible to combine members of multiple types in a TypeScript annotation?

Javascript Typescript Interface

Test if object implements interface

C#Reflection Interface

How do Java Interfaces simulate multiple inheritance?

Java Interface Multiple Inheritance

Fields in interfaces

Java Oop Interface

Inheritance from multiple interfaces with the same method name

C#Inheritance Methods Interface Multiple Inheritance

Implement an Interface with Generic Methods

C#Generics Interface

Optional parameters for interfaces

C#Interface C# 4.0 Optional Parameters

TextWatcher for more than one EditText

Android Interface Android Activity Android Edittext Textwatcher

Passing function as a parameter in java

Java Android Function Interface Parameters

Traits vs. interfaces

Php Interface Traits

How to implement enum with generics?

Java Generics Interface Enums

What's the difference between interface and @interface in java?

Java Interface Annotations Language Features

Can a normal Class implement multiple interfaces?

Java Interface Multiple Inheritance

Interface vs Abstract Class (general OO)

Oop Interface Abstract Class

Difference between OOP interfaces and FP type classes

Oop Haskell Interface Functional Programming Typeclass

Java: Interface with new keyword how is that possible?

Java Pass Method as Parameter

Java Interface Method Reference

Why does IEnumerable<T>.ToList<T>() return List<T> instead of IList<T>?

C#Linq Interface Ienumerable

How to use the Implements in Excel VBA

Excel Vba Interface

Default method returns true for a while, and then returns false? (Possible JVM bug)

Java Inheritance Interface Java 8

What are the differences between abstract classes and interfaces in Java 8?

Java Interface Abstract Class Java 8 Diamond Problem

Why are class static methods inherited but not interface static methods?

Java Inheritance Java 8 Interface Static Methods

How to create an anonymous implementation of an interface?

Interface Kotlin

Implementing multiple interfaces with Java - is there a way to delegate?

Java Interface Delegation

Interface or an Abstract Class: which one to use?

Php Oop Interface Abstract Class

How to create an interface composed of other interfaces?

Why we do create object instance from Interface instead of Class?

C#Class Interface Derived Class

Interface naming in Java

Java Interface Naming Conventions

interface as a method parameter in Java

Java Oop Interface

Why are interfaces needed in Golang?

Go Struct Interface

Why does Java let you cast to a collection?

Java Collections Interface Casting

Is it the best practice to extract an interface for every class?

C#Interface Software Design

Why do we need interfaces in Java?

Implementing two interfaces with two default methods of the same signature in Java 8

Java Interface Java 8

Cyclic inheritance when implementing inner interface in enum

Java Interface Enums

When should I use an interface in java?

Explaining Interfaces to Students

Unable to declare Interface " async Task<myObject> MyMethod(Object myObj); "

C#Async Await Interface asp.net 4.5

How to create interface between Fragment and adapter?

Java Android Interface

When should one use interfaces?

Delegates vs Interfaces in C#

C#Interface Delegates

Java interface throws an exception but interface implementation does not throw an exception?

Java Exception Interface

Interface naming convention

C#Interface Naming Conventions

Finding the Concrete Type behind an Interface instance

C#Interface Types Concrete

How to open the keyboard automatically on UITextField?

Iphone Objective C Interface Uitextfield Builder

Abstract Class vs. Interface

Php Interface Abstract Class Conceptual

toString(), equals(), and hashCode() in an interface

Java Interface Equals Hashcode Tostring

Comparison : interface methods vs virtual methods vs abstract methods

C#Interface Virtual Abstract

Is there an interface similar to Callable but with arguments?

Why is it possible to implement an interface method in base class?

In TypeScript, What is the type of Image?

Typescript Image Interface

Where to put @Transactional? In interface specification or implementation?

Java Spring Interface Transactions

Hiding nil values, understanding why Go fails here

Pointers Go Interface Null

Angular Material Table Dynamic Columns without model

Dynamic Interface Angular Material Datasource

Compelling Reasons to Use Marker Interfaces Instead of Attributes

.Net asp.net Attributes Interface Marker Interfaces

How instanceof will work on an interface

Java Interface Instanceof