Hello World

*&---------------------------------------------------------------------*
*& Report ZMENG_OBJECT
*&---------------------------------------------------------------------*
*&
*&---------------------------------------------------------------------*
REPORT zmeng_01_object.

*&---------------------------------------------------------------------*
*& 类定义
*& 在ABAP对象中，类的结构包含诸如属性，方法，事件，类型和常量等组件。
*&---------------------------------------------------------------------*
CLASS class1 DEFINITION.
  PUBLIC SECTION.

  DATA: text1(45) VALUE 'ABAP Objects.'.

  METHODS: display0.
  METHODS: display1.
ENDCLASS.

*&---------------------------------------------------------------------*
*& 类实现
*&---------------------------------------------------------------------*
CLASS class1 IMPLEMENTATION.
  METHOD display0.
    WRITE: / 'Hello world.'.
  ENDMETHOD.

  METHOD display1.
    WRITE:/ 'This is the Display method.'.
  ENDMETHOD.
ENDCLASS.

START-OF-SELECTION.
  DATA: class1 TYPE REF TO class1.

  CREATE OBJECT: class1.

  WRITE:/ class1->text1.

  CALL METHOD: class1->display0.

  CALL METHOD: class1->display1.

*&---------------------------------------------------------------------*
*& Output Result
*&---------------------------------------------------------------------*
*& ABAP Objects.
*& Hello world.
*& This is the Display method.
*&---------------------------------------------------------------------*