Object Oriented Design

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Object Oriented Design
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Goals

• More on UML Sequence Diagrams
• Game 1 Truck versus Frog
• Workshop start game design 2

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Problem AnalysisBehavior
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Diagrams

• Structural Diagrams (represent static application
  structure)
• Class Diagram (examples)
• Object Diagram (examples)
• Component Diagram
• Deployment Diagram
• Behavior Diagrams (represent different aspects of
  dynamic behavior)
• Use Case Diagram
• Sequence Diagram (examples)
• Activity Diagram
• Collaboration Diagram
• Statechart Diagram
• Model Management Diagrams (ways you can organize
  and manage your application modules)
• Packages
• Subsystems
• Models

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Sequence Diagrams

• Sequence diagrams describe BEHAVIOR through
  describing interactions among classes
• Interactions are modeled as exchanges of messages
• Contain
• Class roles, the roles an object may/can play
  within the interaction
• Lifelines, the existence of an object over time
• Activations, active time when an object performs
  an operation
• Messages, communication between objects
• source http//www.redwood.nl

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Notation used in a Sequence Diagram
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Sequence Diagrams Structure
System Border
class1
class2
class3
class4
message()
new()
local()
use case scenario written down here
check()
checktrue new()
Time
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Game 1 Frogger

• You are a frog. Your task is simple hop across a
  busy highway, dodging cars and trucks, until you
  get the to the edge of a river, where you must
  keep yourself from drowning by crossing safely to
  your grotto at the top of the screen by leaping
  across the backs of turtles and logs. But watch
  out for snakes and alligators! (Sega, 1980)

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Modeling Frog versus Truck

• from the perspective of the
• Frog
• Truck
• Highway
• using a sequence diagram

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More objects

• How to create and dispose trucks on the fly?

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Workshop Model Space Invaders

• Analyze Specification what is missing?
• Design Structure
• Class diagram
• Object diagram (screen dump)
• Design Behavior
• Sequence Diagrams

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Homework Checkpoint

• Download AgentSheets
• Key will be emailed to you
• Build Frogger game
• Email project (Alex Andri)
• Windows use email project feature
• Mac stuff project folder
• Due Sept. 10

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Announcements

• Office hours change THIS WEEK ONLY
• Instead of Wednesday Thursday, Sept 5, 2-3pm