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ARTICLE
Statements for Defining Classes and Interfaces The following statements define classes and interfaces and their components. You can use them in any ABAP program in which class and interface can be defined.
Statements for Defining Classes
Defining the Declaration Part CLASS ... DEFINITION ... ... ENDCLASS ...
Defining the Implementation Part CLASS ... IMPLEMENTATION ... ... ENDCLASS ...
Statements for Defining Class Components
Statements in the Declaration Part PUBLIC SECTION. PROTECTED SECTION. PRIVATE SECTION.
TYPES ...
INTERFACES ... ALIASES ...
CONSTANTS ...
CLASS-DATA ... DATA ...
CLASS-METHODS ... METHODS ...
CLASS-EVENTS ... EVENTS ...
Statements in the Implementation Part METHOD ... ... ENDMETHOD.
Statements for Defining Interfaces
Declaring the Interface INTERFACE ... ... ENDINTERFACE ...
Statements for Declaring Interface Components In interfaces, you can use the same statements to declare interface components as those used in the declaration part of classes.
Note In the declaration part of a class or in interface, you declare its components, that is, its attributes, methods, and events. You can declare local data types using the TYPES statement. You can also declare alias names for the components of implemented interfaces using the ALIASES statement. In a class, all declarations must belong to one of the four visibility sections introduced by the relevant statement. The implementation part of a class only contains method implementations in METHOD - ENDMETHOD blocks. In a method, you can only use the statements for method implementations . No statements other than those listed above are necessary for defining classes or interfaces. Consequently, no other statements are al lowed between CLASS and ENDCLASS or INTERFACE - ENDINTERFACE except within methods. The stricter syntax in ABAP Objects applies to all statements for defining classes and interfaces.
