Values not getting in output?

[former_member209120]

Values in the below program not getting in output why?

*General local class by using static and instance.
*Define the class
CLASS cl_lc DEFINITION.
   PUBLIC SECTION.
     DATA      : a TYPE i.                                  
     CLASS-DATA: b TYPE i.                                  
     METHODS display.
     CLASS-METHODS disp.
ENDCLASS.                    "CL_LC DEFINITION

*Implement the class
CLASS cl_lc IMPLEMENTATION.
   METHOD display.
     WRITE😕 'IT IS INSTANCE METHOD',
           / 'INSTANCE VARIABLE = ', a.
   ENDMETHOD.                    "DISPLAY
   METHOD disp.
     WRITE😕 'IT IS STATIC METHOD' COLOR 2,
           / 'STATIC VARIABLE = ', b COLOR 2.
   ENDMETHOD.                    "DISP
ENDCLASS.                    "CL_LC IMPLEMENTATION

*Create the object
DATA obj TYPE REF TO cl_lc.
DATA obj1 TYPE REF TO cl_lc.

START-OF-SELECTION.
   CREATE OBJECT obj.
   CREATE OBJECT obj1.
*Call the instance method
   obj->a = '10'.
   CALL METHOD obj->display .

*Call the static method.
   obj->b = '20'.
   CALL METHOD obj->disp.


*Call the instance method
  obj->a = '30'.    " This value i am not getting in output.
   CALL METHOD obj1->display.

*Call the static method.
   obj->b = '40'.
   CALL METHOD obj1->disp.

Out Put

IT IS INSTANCE METHOD

INSTANCE VARIABLE =          10

IT IS STATIC METHOD

STATIC VARIABLE =          20

IT IS INSTANCE METHOD

INSTANCE VARIABLE =          0    " Here 30 should come

IT IS STATIC METHOD

STATIC VARIABLE =          40

[Former Member]

Hi Ramesh,

Seems a typing error.

You are setting OBJ variable and calling the OBJ1 method set the obj1->a = 30.

[former_member209120]

Hi Yakub,

*Call the instance method
  obj->a = '30'.    " This value i am not getting in output.
   CALL METHOD obj1->display.

*Call the static method.
   obj->b = '40'.   " How i am getting this value can you explain why?
   CALL METHOD obj1->disp.   

[gouravkumar64]

Hi ramesh,

Replace your  code line ,

*Call the instance method

  obj->a = '30'.    " This value i am not getting in output.

   CALL METHOD obj1->display.

with

obj1->a = '30'.

Thanks

Gourav.

[former_member209120]

Hi Kumar,

same, I used for  '40'  but i am getting out why?

obj->b = '40'.
   CALL METHOD obj1->disp.

[former_member188827]

Because "B" is static attribute of class and it will hold same value for all the objects of the class.

The statement CLASS-DATA declares a static attribute attr whose validity is not associated with instances of a class but with the class itself. All instances of the class and its subclasses access the same static attribute.

Regards

[gouravkumar64]

Hi,

Hope You know the difference between static and instance ,

Your answer stored on that .Search in web for more information.

Thanks

Gourav.

[Former Member]

Hi Ramesh,

Change the code as below,

   obj1->a = '30'.    " This value i am not getting in output.

   CALL METHOD obj1->display.

Thanks,

Kannan

[former_member188827]

Instead of obj1 use obj:

*Call the instance method

  obj->a = '30'.    " This value i am not getting in output.

   CALL METHOD obj1->display.

Use:

*Call the instance method

  obj->a = '30'.    " This value i am not getting in output.

   CALL METHOD obj->display.

Regards