Object-oriented + ABAP Objects

[Former Member]

Hello friends,

I would like to know, is it possible in ABAP Objects to do the followings:

Single Inheritance

Multiple Inheritance

Polymorphism

Data Abstration

Method Overloading, and method Overriding

Inner Classes ?

Would be nice if some one highlights some of the features of ABAP Objects, in comparision or in regards to JAVA or so...

Many thanks in advance...

[Former Member]

Lakshmanan

How is "delegated inheritance" different from the ABAP OO single inheritance model?

If you say that a "child" method is executed when a "parent" method is called, then that sounds like a regular method override.

Am I missing something? Can you be more specific or perhaps provide an example?

Regards

Kurt

[Former Member]

Single Inheritance -> Yes

Multiple Inheritance -> No

Polymorphism -> Yes

Data Abstration -> Interfacing ...

Method Overloading, and method Overriding -> Yes

Inner Classes ? -> Yes

More info <a href="http://www.sapgenie.com/abap/OO/index.htm">[ Here ]</a>

[abdul_hakim]

Hi Syed.

You cannot have Multiple inheritence in ABAP or Java.

Other things you can have.

Just search for ABAP Objects for Java Developers in SDN you will a wonderful document of SAPTeched.

For more details on ABAP Objects you get a book of ABAP OBJECTS by Horst Keller which is available from SAP Press.

Abdul

[Former Member]

Hello thanks for your replies,

In book ( ABAP Objects ) I did not came across for inner-classes, or method overloading, or method overriding concept...?

Do we have interface concept in ABAP Objects ??

Are u sure one can do metho-overloading in ABAP Objects ??

[Former Member]

Yes - Yes - Yes !

<b>thanks for the reward!</b>

Message was edited by: Stephan Kaminski

[Former Member]

Hello Stephan,

Thanks for your reply,

Can you pls help me to figure out, what are the dissimilarities between JAVA and ABAP Objects.....

Vielen Danke !

looking farward for your reply,

[Former Member]

Here is a link :

ABAP Objects for Java Developers :

https://www.sdn.sap.com/irj/sdn/docs?rid=/webcontent/uuid/1693f0b7-0701-0010-8187-931b02a5fbfb [original link is broken]

[Former Member]

Hello,

Yes I know this link, but the guy did not talked in language concept of the two object-oriented languages.

I am intrested more , programmically things which one can do in Java and cant be done in ABAP or so..e.g there is a concept of FINAL methods in java, and we dont have in ABAP Objects ( well I guess ) would be nice if you can add few things in this regards, ( the java have muilti-threading concept and we dont have in ABAP Objects ) stuff like that,.....

thanks,

[Former Member]

Hi,

In ABAP : We do have final concept!

There are differencies between 'Local Classes' created in abap wihtin One program : for example Handler for ALV Grid

And Repository classes : Created in the repository available for any program!

Multi threading can be done via asynchronous Function module or with event!

greetz!

<b>Thanks for small-> Big reward!</b>

[Former Member]

huum...

Do you know any thing for my knowledge, which one can do in ABAP Objects and cant be done in Java or vice-versa ?

Points are going to be rewards,

Thanks for your help and input...

[Former Member]

Hi

The Best is REPOSitory objects

- Centralized

- Easy to maintain

- Easy UI to create

Transaction code is SE24 -> Class Builder !

http://help.sap.com/saphelp_nw04/helpdata/en/ca/c035baa6c611d1b4790000e8a52bed/content.htm

[Former Member]

Shah

ABAP OO supports polymorphism through inheritance (override) but not overloading. If you try to overload a method you will get a compile error saying the method already exists.

ABAP OO does not support inner classes - you cannot nest one class within another.

Your other questions have already been answered by other members.

Regards

Kurt

[Former Member]

In sap delegated inherintance is supported ,that is when a parent is called or executed ,automatically the child gets executed .

[Former Member]

Lakshmanan

How is "delegated inheritance" different from the ABAP OO single inheritance model?

If you say that a "child" method is executed when a "parent" method is called, then that sounds like a regular method override.

Am I missing something? Can you be more specific or perhaps provide an example?

Regards

Kurt