All Questions
Tagged with abstract-class inheritance
21 questions
2
votes
3
answers
649
views
Object Oriented Programming - what is the best way to add new parameters?
I have a doubt about what would be the right OOP approach for implementing classes that do similar stuff with different parameters.
To provide a simple example, I would use two polynomial classes, ...
- 138
-1
votes
2
answers
186
views
Is an abstract role needed to ensure that a customer can only have one role out of several? [closed]
I have the following UML class diagram in a C++ context. I want to make sure that a Customer can have only one role:
Can the Customer now only assume one role, and what does <<abstract>> ...
- 11
0
votes
3
answers
277
views
Java Inheritance Problem
I have the finance application where we can have different types of transactions, like balance enquiry, funds transfer, and pin change etc. Now the Transaction is a base class, and there are specific ...
- 321
5
votes
1
answer
2k
views
How to go ahead with methods that only one derived class implements from a common interface?
I have one interface (let's say in C++) that has been implemented by some derived classes. Let's suppose that the interface is like this:
class IBase
{
virtual bool method_1() = 0;
virtual long ...
- 211
17
votes
4
answers
4k
views
When to move a common field into a base class?
I currently have two derived classes, A and B, that both have a field in common and I'm trying to determine if it should go up into the base class.
It is never referenced from the base class, and say ...
- 475
1
vote
3
answers
680
views
Should a property be in an abstract class if not directly used
I have an abstract base class that is inherited by several different other types. They were all using a type injected into their constructor. So I moved this property in to the abstract base class. ...
- 121
2
votes
1
answer
102
views
Feedback on inheritance assignment
So I've got this java assignment for college and was just wondering if anyone here could give me some feedback as to what I've been thinking some of this means.
I've got a .csv file with building ...
- 43
2
votes
2
answers
960
views
Is there a best practice to forward method overrides while enforcing method execution?
Sometimes i have code along the lines of this:
public abstract class A
{
protected abstract void DoSomething();
}
public abstract class B : A
{
/// <...
- 129
0
votes
1
answer
539
views
How to design inheritance from abstract class which is not initiated but seemingly must be initiated?
I need to design a program in Java which calculates arithmetic expressions (only addition or subtraction).
Requirements:
1) abstract class Expression which contains abstract method calculate()...
- 167
3
votes
1
answer
525
views
Best design for classes that draw objects but do not inherit from JPanel
I'm doing the exercise 10.1, page 476 from the book Java: How To Program, Early Objects by Paul and Harvey Deitel (10th Edition).
Modify the MyLine, MyOval and MyRectangle classes of GUI to create ...
- 167
1
vote
2
answers
634
views
Options for derived classes of two abstract base classes
Let's say there are classes D1, D2, etc. describing different types of an abstract class D.
Let's say there are SenderReceiver classes describing different ways of communicating for each D1, D2, etc.:...
- 207
1
vote
1
answer
210
views
Is it valid to create superclass instance in OOP?
I have couple of files in my folder, some of them can be checked for integrity. I have a xml file which describes which files can be checked for integrity and their checksum.
In OOP, let's assume I ...
- 121
8
votes
3
answers
30k
views
C++ derived class copy constructor
If I have an abstract class Drink which has a derived class Coffee, what would the copy constructor for Coffee look like? If it accepts a reference of Type Coffee as a parameter then I wouldn't be ...
- 83
0
votes
1
answer
166
views
Inheritance and polymorphysm conundrum
Okay, I'm trying to write something resembling a 3D game engine. That means I have to deal with matrix transformations and similar stuff.
For any of you who don't know, you need to use three basic ...
- 307
4
votes
1
answer
235
views
Inheritance from children to parents?
Seeing this UML class diagram :
FileHandler, Uploader and Deleter are abstract classes.
The four bottom classes are implementations. They extend on FileHandlerInterface which requires a handle method ...
- 1,761