Mod 4
Realization, Interfaces and Abstract Classes
Realization
➢ a relationship between two model elements, in which one model element realizes
the behavior that the other model element specifies.
➢ one entity denotes some responsibility which is not implemented by itself and the
other entity that implements them. This relationship is mostly found in the case of
interfaces.
Interfaces
➢ a group of related methods with empty bodies
• Abstract – by default, methods are in the form of an unimplemented
function signature
→ An interface can be implemented by a class
→ it is inherited using the keyword, implements.
→ All methods of an interface must be mandatory implemented on all classes
implementing a specific interface.
→ Don’t have an attribute
