ABAP Keyword Documentation →  ABAP − Reference →  Declarations →  Declaration Statements →  Classes and Interfaces →  CLASS →  CLASS - DEFINITION 

CLASS - components

The components of the classes are defined in the visibility sections. The following declaration statements are possible for components:

• TYPES, DATA, CLASS-DATA, and CONSTANTS for data types and data objects

• METHODS, CLASS-METHODS, EVENTS, and CLASS-EVENTS for methods and events

• INTERFACES for implementing interfaces and ALIASES for alias names for interface components

Other versions: 7.31 | 7.40 | 7.54

Note

All the components in a class are in the same namespace. Within a class, the name of a component must be unique to its type (data type, attribute, method, event, or alias name). The components of an implemented interface are marked with the prefix intf~ (the name of the interface with interface component selector).

Example

Declaration of various components in the public and private visibility area of a class.

INTERFACE intf.
  ...
ENDINTERFACE.

CLASS cls DEFINITION.
  PUBLIC SECTION.
    INTERFACES intf.
    TYPES:
      type ...
    CLASS-METHODS:
      factory RETURNING VALUE(ref) TYPE REF TO cls.
    METHODS:
      constructor ...,
      meth ...
  PRIVATE SECTION.
    DATA:
      attr TYPE ...
ENDCLASS.