Top "Abstract-class" questions

Abstract classes are classes which cannot be instantiated.

Deserializing an abstract class in Gson

I have a tree object in JSON format I'm trying to deserialize with Gson. Each node contains its child nodes …

java json abstract-class gson
What is the point of using abstract methods?

What's the point of using "abstract methods"? An abstract class cannot be instantiated, but what about the abstract methods? Are …

java abstract-class
AS3 - Abstract Classes

How can I make an abstract class in AS3 nicely? I've tried this: public class AnAbstractClass { public function toBeImplemented():void { …

actionscript-3 oop abstract-class
Abstract UserControl inheritance in Visual Studio designer

abstract class CustomControl : UserControl { protected abstract int DoStuff(); } class DetailControl : CustomControl { protected override int DoStuff() { // do stuff return result; } } I …

c# winforms abstract-class user-controls
Abstract base class in Dart

I have been programming in Java for nearly two years but I am now more shifting to web programming and …

java oop dart abstract-class base-class
PHP: Fatal error: Cannot instantiate abstract class

I have an abstract database class named as: abstract class database { protected $value; } I created another abstract class abstract class …

php abstract-class instantiation
Internal abstract class: how to hide usage outside assembly?

I have a common assembly/project that has an abstract base class, then several derived classes that I want to …

c# inheritance abstract-class access-modifiers
Pimpl idiom vs Pure virtual class interface

I was wondering what would make a programmer to choose either Pimpl idiom or pure virtual class and inheritance. I …

c++ abstract-class pimpl-idiom
What is exact difference between Inheritance and Abstract class?

I know the fundamentals of OOP concepts[Inheritance, Abstraction, Encapsulation, Polymorphism] We use Inheritance in case of Parent-Child relationship[Child …

java oop inheritance abstract-class abstraction
Equivalent of Java interfaces in C++?

Possible Duplicate: How do you declare an interface in C++? Interface as in java in c++? I am a Java …

java c++ overriding abstract-class virtual-inheritance