The tag has no usage guidance.

learn more… | top users | synonyms

0
votes
3answers
467 views

Why List<E> interface is additionally introduced in collection hierarchy? [duplicate]

Below is the diagram, where, if we just consider the implementations of List, AbstractList maintains the core behavior of list. To introduce the new implementation class MyList(say) one can ...
0
votes
3answers
18k views

I want to understand clearly why can't we instantiate an object of an abstract class [duplicate]

Can I get a clear explanation why why can't we instantiate an object of an abstract class. I know abstract is not real. But I want to know more why can't we instantiate an object of an abstract class.
0
votes
2answers
468 views

How To Invoke A Method When It's Class is Accessed (Any Method) - “OnClassEnter”

I am working on a C# net micro framework project, in particular an I2C bus management/class. I have several different I2C devices each defined in separate classes which contain all of the devices' ...
0
votes
1answer
72 views

What should this interface contain?

I am creating a schema for Doctrine but first I'm creating interfaces, abstract classes (models) which will be extended by the entities. I have a PresentationInterface which contain getter and ...
0
votes
1answer
71 views

Would it make sense to add parameters of an inferred type to inheritance?

I'll write this in PHP (where this thought originated), but this is generic to any object-orientated language. Basically, this is an addition to abstract classes that defines the implementation of its ...
0
votes
1answer
71 views

Abstract classes with static methods in PHP

Pre: I am looking at a quite big PHP project developed by a company which we need to partly interact with while building a new webapp. The whole application is developed in PHP 5. Most of the ...
0
votes
2answers
313 views

UML Class Diagram: Abstract or Interface?

I am modeling a class diagram and have spotted an opportunity to simplify it slightly. What I want to know is, would this it be better to implement an abstract class or an interface? The scenario is ...
0
votes
0answers
45 views

Code Duplication After Dependency Injection Instead Of Inheritance

I'm applying Dependency Injection instead of Inheritance. But now, I've the problem of code duplication. Main Controller final class PreferenceController implements PreferenceInterface { ...
-2
votes
1answer
865 views

calling an abstract method in abstract class

Suppose i have an abstract base class Parent which defines an abstract Method A(some parameter) taking a parameter, also it defines an instance Method B which calls method A(parameter) inside its ...