Top "Abstract" questions

C#: Creating an instance of an abstract class without defining new class

I know it can be done in Java, as I have used this technique quite extensively in the past. An …

c# abstract-class abstract anonymous-class

Angular4 Components inheritance with abstract class

I want to define a base class for my components to share some features. So i've began with : export abstract …

angular typescript inheritance components abstract

Can an enum have abstract methods?

Can an enum have abstract methods? If so, what is the use, and give a scenario which will illustrate this …

java enums abstract

Comparison : interface methods vs virtual methods vs abstract methods

What are the advantages and disadvantages of each of these? interface methods virtual methods abstract methods When one should choose …

c# interface virtual abstract

The designer must create an instance of...cannot because the type is declared abstract

Visual Studio complains: Warning 1 The designer must create an instance of type 'RentalEase.CustomBindingNavForm' but it cannot because the type …

c# .net winforms abstract

Abstract Method in Ruby

How can I force a subclass to implement a method in Ruby. There doesn't seem to be an abstract keyword …

ruby abstract

How to force implementation of a method in subclass without using abstract?

I want to force subclass to implement an implemented method of my mother class. I look this Java - Force …

java class methods abstract implements

what is a abstract method on a interface in java

Possible Duplicate: Why would one declare a Java interface method as abstract? I found the following code in one of …

java interface ejb abstract

static abstract methods in c++

I have an abstract base class class IThingy { virtual void method1() = 0; virtual void method2() = 0; }; I want to say - "all …

c++ abstract

Abstract Class in Delphi

I am using a component suite which has many abstract classes. Now I want to apply polymorphism but I am …

delphi abstract delphi-2009