Exercise 2

Find the Object Relations

Purpose: To start thinking about object relations, and to learn more about identifying objects.

Consider a telephone.

To describe the telephone, the following abstractions may be used: Microphone, Main Unit, Dialling Pad, Receiver, Key "0", "1", "2" ... , "9" and Loudspeaker.

Your task is to find suitable object relations among the objects above, and to draw a diagram showing the resulting hierarchy.

Hint

Focus on object relations which are of type: object X consists-of object Y.