topic Re: Abstract Class in Application Development and Automation Discussions

Abstract Class

Former Member — Thu, 03 Apr 2008 12:41:37 GMT

Hoe can i use a method in abstract class, in a different class

Thanks

Re: Abstract Class

Former Member — Thu, 03 Apr 2008 12:43:00 GMT

when its an interface use interface keyword

otherwise use INHERITING


CLASS class DEFINITION INHERITING FROM superclass

regards

Re: Abstract Class

Former Member — Thu, 03 Apr 2008 12:44:51 GMT

Hi,

see this example code



CLASS c1 DEFINITION ABSTRACT.
  PUBLIC SECTION.
    METHODS m3.
  PROTECTED SECTION.
    METHODS m1.
  PRIVATE SECTION.
    DATA a1 TYPE string VALUE `Attribute A1 of class C1`.
ENDCLASS.

CLASS c2 DEFINITION INHERITING FROM c1 FINAL.
  PUBLIC SECTION.
    METHODS m2.
ENDCLASS.

CLASS c1 IMPLEMENTATION.
  METHOD m1.
    WRITE / a1.
  ENDMETHOD.
  METHOD m3.
    WRITE / 'public method from abstract class'.
  ENDMETHOD.
ENDCLASS.

CLASS c2 IMPLEMENTATION.
  METHOD m2.
    m1( ).
  ENDMETHOD.
ENDCLASS.

DATA oref TYPE REF TO c2.

START-OF-SELECTION.

CREATE OBJECT oref.
oref->m2( ).
oref->m3( ).

rgds,

bharat.

Re: Abstract Class

Former Member — Thu, 03 Apr 2008 12:45:43 GMT

Hi,

By using interface or inheriting the super class.

Thanks,

Sriram Ponna.

Re: Abstract Class

Former Member — Thu, 03 Apr 2008 12:46:20 GMT

Yes U can use it.

But u have to implement all the other methods in the class. Bcz, the class is abstract class.

Regards,

Angi

Re: Abstract Class

Former Member — Thu, 03 Apr 2008 12:46:34 GMT

hi Anu Chintalapudi ,

Abstract classes are majorly used when u want to substitute a part of the class functionality through your own defined implementation.

Interfaces are generally used when you dont have an exact defined implementation to any of the methods in the class..

Thats why you define an interface for a class and we will use a class to implement that.

Implementing Abstract class methods :

https://forums.sdn.sap.com/click.jspa?searchID=8998584&messageID=4078691

Hopefully it gives you some idea.

Reward if helpful

rekha

Re: Abstract Class

Former Member — Thu, 03 Apr 2008 12:47:17 GMT

how can i create the object for that

Re: Abstract Class

Former Member — Thu, 03 Apr 2008 12:50:47 GMT

Hi,

u cannot create object to abstract classes.so we will inherit it to some other class and create object for that.through that object we will call the abstract class methods.

see the example i have given above.

rgds,

bharat.

Re: Abstract Class

Former Member — Thu, 03 Apr 2008 12:56:33 GMT

Abstract class is already in se24, i need to use a method from it

Re: Abstract Class

Former Member — Thu, 03 Apr 2008 13:02:49 GMT

Hi,

say ur abstract class is ZCL_BHABSTRACT


CLASS zcl_bhabstract DEFINITION LOAD.

CLASS c2 DEFINITION INHERITING FROM zcl_bhabstract FINAL.
  PUBLIC SECTION.
    METHODS m2.
ENDCLASS.


CLASS c2 IMPLEMENTATION.
  METHOD m2.
    m1( ).
  ENDMETHOD.
ENDCLASS.

DATA oref TYPE REF TO c2.

START-OF-SELECTION.

CREATE OBJECT oref.
oref->m2( ).
oref->m3( ).

CLASS zcl_bhabstract DEFINITION LOAD. statement will make the se24 class zcl_bhabstract local to the program

rgds,

bharat.