Why do we need a Self Reference "me" to use the components of a class

Question

Hi
I am not clear why do we need a self reference variable "me" to call the components of its own class? when it can be accessed directly as in the following examples?
In my first example below i can call the method display_name directly without creating a reference object or instance of the class within the class.
In the second example i am using the self refernce Write me->name to access the component of a class.
My question is why do we need "me" when i can use the components directly as shown in my first example.
CLASS egocentric DEFINITION.
  PUBLIC SECTION.
    DATA:
     name(10) TYPE c READ-ONLY.
    METHODS set_name.
    METHODS display_name.
ENDCLASS.                    "egocentric DEFINITION
*       CLASS egocentric IMPLEMENTATION
CLASS egocentric IMPLEMENTATION.
  METHOD set_name.
    MOVE 'Abap Objects' TO name.
    CALL method display_name.
  ENDMETHOD.                    "write_name
  METHOD display_name.
    write: name.
  ENDMETHOD.                    "display_name
ENDCLASS.                    "egocentric IMPLEMENTATION
*Global Data
DATA oref TYPE REF TO egocentric.
START-OF-SELECTION.
  CREATE OBJECT oref.
  CALL METHOD oref->set_name.
CLASS egocentric DEFINITION.
        PUBLIC SECTION.
            DATA:
             name(10) TYPE c VALUE u2018Instructoru2019
READ-ONLY.
             METHODS write_name.
ENDCLASS.
CLASS egocentric IMPLEMENTATION.
        METHOD write_name.
            WRITE me->name.
        ENDMETHOD.
ENDCLASS.
*Global Data
DATA oref TYPE REF TO egocentric.
START-OF-SELECTION.
        CREATE OBJECT oref.
        CALL METHOD oref->write_name.

Answer 1

You can go WIKI and search with ABAP Objects.
Or do the same in 'advanced search'  and select a search area. You are bound to find something.
Or this link perhaps:
[abap objects|http://help.sap.com/saphelp_nw70/helpdata/EN/ce/b518b6513611d194a50000e8353423/content.htm]