Interfaces (OOM)

An interface is similar to a class but it is used to define the specification of a behavior. It is a collection of operations specifying the externally visible behavior of a class. It has no implementation of its own.

An interface can be created in the following diagrams:


An interface includes the signatures of the operations. It specifies only a limited part of the behavior of a class. A class can implement one or more interfaces.

A class must implement all the operations in an interface to realize the interface. The following example shows an interface (Designated) realized by a class (Employee).




Created October 7, 2009. Send feedback on this help topic to Sybase Technical Publications: pubs@sybase.com