Object Orientation Part I

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Object Orientation Part I
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Objectives

• Upon Completion of this unit you should be able
  to
• Explain what OOP is
• Explain Class and Object
• Explain Methods and Properties

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Module Map
Object Orientation
Class
Objects and Instances
Methods
Properties, Attributes, etc
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Object Orientation

• Programming (OOP)
• Analysis/Design (OOA/D)
• OO System
• Collection of objects that interact with each
  other
• Behaviors and Characteristics
• Messages
• Real-life examples of objects
• Cars
• Houses
• Employees

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Module Map
Object Orientation
Class
Objects and Instances
Methods
Properties, Attributes, etc
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Class

• Class is a blueprint
• Class is a definition
• Contains Methods and Properties

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Class

• Classes within programming languages
• Window
• Button
• CombBox
• Classes created for systems
• Employees
• Customers
• Products

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Module Map
Object Orientation
Class
Objects and Instances
Methods
Properties, Attributes, etc
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Object

• A specific instance of a class

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Objects Exercise
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Objects Exercise
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Objects Exercise
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Objects Exercise
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Objects Exercise
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Objects Exercise
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Objects Exercise
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Instance

• An object is a specific instance of a class
• An instance and object are referring to the same
  thing

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Instantiation

• The process of creating an object or and instance
  of a class

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Module Map
Object Orientation
Class
Objects and Instances
Methods
Properties, Attributes, etc
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Methods

• Methods define the class abilities or behaviors
• Compare to
• Subroutines
• Procedures
• Functions

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Method Examples

• print() method for Report class
• turnLeft() method for TurnSignal class
• open() and close() methods for Window classes
• CRUD methods (create, read, update, delete)

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Method Types

• Standard
• Mutator (Sets)
• setAge()
• setPrice()
• Accessor (Gets)
• getAge()
• getPrice()

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Module Map
Object Orientation
Class
Objects and Instances
Methods
Properties, Attributes, etc
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Properties/Attributes

• Properties
• Data members
• Attributes
• Fields
• Define a class characteristics

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Summary

• Object Oriented (Analysis/Design/Prog)
• Classes and Objects
• Methods and Properties