การออกแบบและพัฒนา ซอฟต์แวร์ บทที่ 8 Object-Oriented Software Design ปริญญา น้อยดอนไพร สาขาวิชาวิทยาการคอมพิวเตอร์ คณะ วิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยราชภัฏสุราษฎร์ธานี

Object-Oriented Software Design Object-Oriented Concept Introduction to Object-Oriented Software Design

Object-Oriented Concept Object & Class Inheritance ( การสืบทอด ) Polymorphism Encapsulation Class Relationship

Introduction to Object-Oriented Software Design

Object-Oriented Concept Object & Class Inheritance Polymorphism Encapsulation Class Relationship

Object Object World Message Method/Operation Interface Event Responsibilities

Object

Click ( )

Object Person Post Office Deliver (Mail) Deliver Send Mail

Object Person Vending Machine Buy Pepsi Sell (10 Baht, Pepsi) Sell

Object PersonElevator Go to 3 rd floor MoveToFloor (3) MoveToFloor Open Close

Class Person  Somchai  Somsri  Somsak  Somying

Class Student  Somchai  Somsri  Somsak  Somying

Class Tennis Player Paradorn Venus Marat Martina

Class Institute Social Technology Engineering Science Agricultural Technology

Class Template Name Attributes Operations Responsibilities

Class Name Attributes Operations Responsibilities

Class Student StudentID FirstName LastName Address etc… RegisterForCourse DropCourse etc...

Class Tennis Player FirstName LastName Nationality Ranking etc… RegisterForTournament etc...

Class Car Car Reg. Number Maker Model Color etc… Accelerate Stop etc...

Class Airplane Plane Number Manufacturer Model etc… TakeOff Landing etc...

Object & Class Student  Somchai  Somsri  Somsak  Somying

Object & Class Student  Somchai  Somsri  Somsak  Somying Student StudentID FirstName LastName Address etc… RegisterForCourse DropCourse etc...

Object & Class Student  Somchai  Somsri  Somsak  Somying Student1 B Somchai Saetung 7146 Suranivet 7 etc… RegisterForCourse DropCourse etc...

Student1 B Somchai Saetung 7146 Suranivet 7 etc… RegisterForCourse DropCourse etc... Student StudentID FirstName LastName Address etc… RegisterForCourse DropCourse etc...

Object-Oriented Concept Object & Class Inheritance Polymorphism Encapsulation Class Relationship

Inheritance Animal DogPersonCat

Inheritance Land Vehicle TruckCarBus

Inheritance Transaction Rental Transaction Lease Transaction Sales Transaction

Inheritance Class Hierarchy Sub Class Super Class Reusability Overriding

Inheritance Land Vehicle Car Toyota TruckBus ViosAltisCamry

Transaction transNo transDate transTime etc… Rental Transaction Lease Transaction Sales Transaction transNo transDate transTime etc… quantitySold… transNo transDate transTime etc… memberNo… transNo transDate transTime etc… duration…

Object-Oriented Concept Object & Class Inheritance Polymorphism Encapsulation Class Relationship

Polymorphism DrawChart DrawChart(1) DrawChart(1,2,1,2) DrawChart(1,1,1) DrawTriangle(1,1,1) DrawRect(1,2,1,2) DrawCircle(1)

Polymorphism Add(integer, integer) Add(string, string) Add(string, integer) Add(1,1)  2 Add(“Hello”, “World”)  “HelloWorld” Add(“Hello”, 2)  “Hello2” Add(2, “Hello”)  ?

Polymorphism :PaySlip :HourlyPaidEmployee :WeeklyPaidEmployee :MonthlyPaidEmployee  getTotalPay() calculatePay()

Polymorphism Overloading

Object-Oriented Concept Object & Class Inheritance Polymorphism Encapsulation Class Relationship

Encapsulation Abstraction Information Hiding Security

Encapsulation Student StudentID: B FirstName: Somchai LastName: Saetung Courses Registered: [204204], [204203] etc… DropCourse SetName GetName etc...

Encapsulation Person Vending Machine Buy Pepsi Sell (10 Baht, Pepsi) Sell

Object-Oriented Concept Object & Class Inheritance Polymorphism Encapsulation Class Relationship

Association Aggregation Composition Generalization

Class Relationship Association PilotPlanes

Class Relationship Association –Son – Father –Customer – Operator –User - Computer

Class Relationship Composition Car SeatWheelEngine

Class Relationship Composition –Car – Wheel, Engine, Seat –House – Window, Roof, Door, Wall –Computer – Monitor, CPU, Keyboard –Building – Rooms –Circle – Points –Book - Chapter

Class Relationship Aggregation ClassroomStudent

Class Relationship Aggregation –Classroom – Student –Keyboard – Key –Notebook – Paper –Computer – Monitor, CPU, Keyboard

Class Relationship Generalization Land Vehicle TruckCarBus

Class Relationship Generalization –Car – Mercedes-Benz, BMW, Lexus – Animal – Cat, Rat, Dog

Introduction to Object-Oriented Software Design