ABAP 面向对象OO-抽象类及抽象方法（ABSTRACT)

抽象类和抽象方法

抽象类的使用要点

代码

*&---------------------------------------------------------------------*
*& Report Z_OO_ABSTRACT_LHY
*&---------------------------------------------------------------------*
*&
*&---------------------------------------------------------------------*
REPORT Z_OO_ABSTRACT_LHY.

"定义一个抽象类
CLASS ABS_CLS DEFINITION ABSTRACT.
  PUBLIC SECTION.
    METHODS M1 ABSTRACT.
    METHODS M2 .
ENDCLASS.

CLASS ABS_CLS IMPLEMENTATION.
  METHOD M2.
    WRITE:/,'M2M2M2'.
  ENDMETHOD.
ENDCLASS.

CLASS CLS1 DEFINITION INHERITING FROM ABS_CLS.
  PUBLIC SECTION.
    METHODS M1 REDEFINITION.
ENDCLASS.

CLASS CLS1 IMPLEMENTATION.
  METHOD M1.
    WRITE:/,'抽象类的抽象方法输出'.
  ENDMETHOD.
ENDCLASS.

START-OF-SELECTION.
  DATA OBJ TYPE REF TO CLS1.
  CREATE OBJECT OBJ.

  OBJ->M1( ).
  OBJ->M2( ).

运行结果