overriding implemented base class methods

Posted by user793468 on Programmers See other posts from Programmers or by user793468
Published on 2014-05-13T02:03:13Z Indexed on 2014/06/12 3:49 UTC
Read the original article Hit count: 317

Filed under:

object-oriented-design

|

inheritance

|

polymorphism

I read somewhere that the chain of inheritance breaks when you alter a behavior from derived class. What does "altering a behavior" mean here? Is overriding an already implemented method in base class considered as "altering behavior"? Or, does the author mean altering method signatures and the output?

Also, I ready Duplicating code is not a good practice, and its a maintenance nightmare. Again, does overriding an already implemented method in base class considered "Duplicating code"? If not, what would be considered as "Duplicating code"? I

© Programmers or respective owner

Related posts about object-oriented-design

Loose Coupling in Object Oriented Design

as seen on Programmers - Search for 'Programmers'
I am trying to learn GRASP and I found this explained (here on page 3) about Low Coupling and I was very surprised when I found this: Consider the method addTrack for an Album class, two possible methods are: addTrack( Track t ) and addTrack( int no, String title, double duration… >>> More
Object oriented design importance

as seen on Programmers - Search for 'Programmers'
I started studying Object Oriented Design and Modelling using the this book by James Rumbaugh. It uses a tool called Object Modeling Technique (OMT). I have certain newbie questions. I searched the net, but couldn't get answers The book is pretty old. Don't know why the school told me to learn this… >>> More
Object oriented design suggestion

as seen on Stack Overflow - Search for 'Stack Overflow'
Here is my code: class Soldier { public: Soldier(const string &name, const Gun &gun); string getName(); private: Gun gun; string name; }; class Gun { public: void fire(); void load(int bullets); int getBullets(); private: int bullets; } I need to call all the member… >>> More
Object Oriented Design Questions

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello there. I am going to develop a Tic-Tac-Toe game using Java(or maybe other OO Languages).Now I have a picture in my mind about the general design. Interface: Player ,then I will be able to implement a couple of Player classes,based on how I want the opponent to be,for example,random… >>> More
Is Design Pattern only for Object-Oriented design?

as seen on Stack Overflow - Search for 'Stack Overflow'
I was wondering if all design Patterns are only used in Object-Oriented design? Are there any design patterns used in non Object-Oriented design? Thanks and regards! >>> More

Related posts about inheritance

Single Table Inheritance (Database Inheritance design options) pros and cons and in which case it us

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I study about today about 2 database design inheritance approaches: 1. Single Table Inheritance 2. Class Table Inheritance In my student opinion Single Table Inheritance make database more smaller vs other approaches because she use only 1 table. But i read that the more favorite approach… >>> More
How to use Private Inheritence aka C++ in C# and Why not it is present in C#

as seen on Stack Overflow - Search for 'Stack Overflow'
I know that private inheritance is supported in C++ and only public inheritance is supported in C#. I also came across an article which says that private inheritance usually defines a HAS-A relationship and kind of an aggregation relationship between the classes. EDIT: C++ code for private inheritance: The… >>> More
[PHP] Singleton class and using inheritance

as seen on Stack Overflow - Search for 'Stack Overflow'
I have am working on a web application that makes use of helper classes. These classes hold functions to various operation such as form handling. Sometimes I need these classes at more than one spot in my application, The way I do it now is to make a new Object. I can't pass the variable, this will… >>> More
Difference between Inheritance and Composition

as seen on Stack Overflow - Search for 'Stack Overflow'
Are Composition and Inheritance are the same? If I want to implement the composition pattern, how can I do that in Java? >>> More
C# Interface Inheritance (Basics)

as seen on Stack Overflow - Search for 'Stack Overflow'
Why does the following produce a compiler error: public interface OwnSession : ISession { } [...] OwnSession s = SessionFactory.OpenSession(); // compiler error (in german unfortunately) [...] "SessionFactory" returns a "ISession" on "OpenSession()" (NHibernate) >>> More