INTERFACES

Reference

Syntax

INTERFACES ifac
  { { [ABSTRACT METHODS meth1 meth2 ...]
      [FINAL METHODS meth1 meth2 ...] }
    | [ALL METHODS {ABSTRACT|FINAL}] }
  [DATA VALUES attr1 = val1 attr2 = val2 ...].

Effect

Includes an interface in the public visibility section of a class or in another interface.

Additions

• ABSTRACT METHODS meth1 meth2 ...
  Makes the specified instance methods meth1, meth2, ...abstract when implementing the interface in a class.
  
  
• FINAL METHODS meth1 meth2 ...
  Makes the specified instance methods meth1, meth2, ... final when implementing the interface in a class.
  
  
• ALL METHODS {ABSTRACT|FINAL}
  Makes all instance methods abstract or final when implementing the interface in a class.
  
  
• DATA VALUES attr1 = val1 attr2 = val2 ...
  Assigns start values val1, val2, ... to instance attributes attr1, attr2, ... when implementing the interface in a class.