objects – SAP EWM Help https://www.sapewmhelp.com SAP EWM questions answered by experts — ABAP, S/4HANA, warehouse management Thu, 31 Jul 2025 20:29:47 +0000 en-US hourly 1 https://wordpress.org/?v=7.0.2 What is the difference between static and instance Members in SAP OOABAP ? https://www.sapewmhelp.com/question/what-is-the-difference-between-static-and-instance-members-in-sap-ooabap/ https://www.sapewmhelp.com/question/what-is-the-difference-between-static-and-instance-members-in-sap-ooabap/#respond Wed, 30 Jul 2025 17:30:46 +0000 https://www.sapewmhelp.com/?question=what-is-a-constructor-in-ooabap-and-how-is-it-used Instance Members (Methods & Data)

  • Belong to individual objects (instances).
  • Created using DATA and METHODS.
  • Each object has its own copy of the data.
  • Accessed using the object reference: lo_obj->method_name.
  • Useful when each object should maintain its own state.
  • Destroyed when the object goes out of scope.

Static Members (Methods & Data)

  • Belong to the class itself, not any particular object.
  • Created using CLASS-DATA and CLASS-METHODS.
  • Only one copy exists for the entire class.
  • Accessed using the class name: zcl_class_name=>method_name.
  • Useful for shared data, like counters, configuration, or logging.
  • Exist as long as the class is loaded in memory.
*&---------------------------------------------------------------------*
*& Report  ZREP_LCLCLASS
*&
*&---------------------------------------------------------------------*
*&
*&
*&---------------------------------------------------------------------*

REPORT zrep_lclclass.

CLASS zcl_static_instance_demo DEFINITION.
  PUBLIC SECTION.
    " Instance attribute and method
    DATA: gv_instance_value TYPE i.
    METHODS: increase_instance_value.

    " Static attribute and method
    CLASS-DATA: gv_static_value TYPE i.
    CLASS-METHODS: increase_static_value.
ENDCLASS.

CLASS zcl_static_instance_demo IMPLEMENTATION.

  METHOD increase_instance_value.
    gv_instance_value = gv_instance_value + 1.
    WRITE: / 'Instance Value:', gv_instance_value.
  ENDMETHOD.

  METHOD increase_static_value.
    gv_static_value = gv_static_value + 1.
    WRITE: / 'Static Value:', gv_static_value.
  ENDMETHOD.

ENDCLASS.

START-OF-SELECTION.

  WRITE: / '--- Static Method Calls (No object needed) ---'.
  zcl_static_instance_demo=>increase_static_value( ). " 1
  zcl_static_instance_demo=>increase_static_value( ). " 2

  SKIP.

  WRITE: / '--- Instance Method Calls (Using object) ---'.
  DATA(lo_obj1) = NEW zcl_static_instance_demo( ).
  lo_obj1->increase_instance_value( ). " 1
  lo_obj1->increase_instance_value( ). " 2

  SKIP.

  WRITE: / '--- Another Object with Separate Instance ---'.
  DATA(lo_obj2) = NEW zcl_static_instance_demo( ).
  lo_obj2->increase_instance_value( ). " 1 (separate from lo_obj1)

  SKIP.

  WRITE: / '--- Static Again (Still shared) ---'.
  zcl_static_instance_demo=>increase_static_value( ). " 3

Output :

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