ABAP INTERFACE Statement syntax, information and example SAP source code

INTERFACE

Short Reference

ABAP Syntax:
Declaration of Interfaces

1 INTERFACE intf [PUBLIC].
[ components ]
ENDINTERFACE.

Advance Declaration of Interfaces

2 INTERFACE intf DEFERRED [PUBLIC].

What does it do? The statement INTERFACE defines interfaces or declares them in advance.
The definition of an interface consists of a declaration part that starts with
INTERFACE and is ended using ENDINTERFACE . Unlike classes, an interface does not have an implemenation part.
Additional variants of INTERFACE without ENDINTERFACE are used for the advance declaration of interfaces in a program.
The statements INTERFACE and associated statements
ENDINTERFACE can be specified only in the global context of a program. INTERFACE and ENDINTERFACE cannot be specified within classes, procedures, and processing blocks implemented internally as a procedure (event blocks for GET and AT SELECTION-SCREEN ). This applies in particular to the variant of INTERFACE specified here, which is not closed using ENDINTERFACE .
Latest notes: The definition or advance declaration of an interface is handled like other declaration statements ( DATA , TYPE , ...). In a processing block without a local context, they are handled like global program declarations and do not end the processing block.
The obsolete variant INTERFACE ... LOAD was used to load interfaces explicitly.