Developing an OO SolutionWMC GreenLake

May 5, 2006

Joe Kmoch

Milwaukee Public Schools

jkmoch.com/apcs

joe@jkmoch.com

Agenda

• Identify Objects (Classes)

• Identify Operations (Responsibilities)

• Identify Relationships (Collaborations)

• Develop Scenarios

• Implement OO Design

Your First Task

• Put a rectangle around each noun

• Encircle each action verb

Objects (Candidates)

• nouns

Operations (Responsibilities)

• Verbs

• ID what can be done to objects or

• ID what objects can do for themselves

• ID who is responsible for doing what

Relationships (Collaborations)

• What objects need to know about what other objects do

Develop Scenarios

• How objects interact– Right objects? Operations? Relationships?

• Common and uncommon scenarios

• Possibly recognize new design requirements

Implementing OO Design

• Design public interfaces

• Design internal data representation

• Implement public member functions

• Test individual objects and member functions