Objects by Sufian Idris

[object Object],[object Object],[object Object],[object Object]

Object Space $$ $$ Kad ATMku Kad ATMku

Definition of Object ,[object Object],[object Object],[object Object],[object Object],[object Object]

Object State ,[object Object],BEFORE AFTER

[object Object],Example: A Car object Another Car object Car “ WHH7801” green “ Sufian Idris” colour plateNr owner Car “ WHY9531” blue “ Ali Bakar” colour plateNr owner

[object Object],[object Object],Fridge “ 342-0967” “ Ali Bakar” biru owner serialNr colour value is fixed values can be changed

[object Object],[object Object],The links are added to represent the fact that both cars are owned by the same person. : Car : Person : Car links

[object Object],The links are added to represent the fact that the engine and the chassis are part of the car. This relationship is also called aggregation. : Car : Engine : Chassis links

[object Object],[object Object],: Computer datePurch processor memory 15032002 : Memory size 256 : Processor speed 900 object references

Object Behaviour ,[object Object],[object Object],jump

[object Object],The Scanner object responds by inputting a float value and returning that value to the TemperatureConverter object. : Scanner : Temperature Converter nextFloat()

[object Object],: Rectangle 5 colour width height 10 green zoom_2x 10 20

[object Object],switchChannel(5) openCommChannel() switchChannel(5) closeCommChannel() Saluran Ceria Anda

Object Identity ,[object Object],Triplets… but each of them has its own identity

[object Object],class Computer { private int computerID; private Date datePurchased; private Processor processor; … } Redundant

Relationship between Object State and Object Behaviour ,[object Object],[object Object],[object Object]

[object Object],Number of tins: 20 What if there are no more tins in the machine? dispense() Koka Koola

Abstraction ,[object Object],weight length heart size chew drink run … … … there are too many! Attributes Behaviour

[object Object],[object Object],: Bird 5 colour weight height 10 white 14 0.5

Encapsulation ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],40 area() attributes: width height … behaviour: area() return width * height; HIDDEN BY OBJECT

[object Object],[object Object],[object Object]

Object Interface ,[object Object],[object Object]

[object Object],[object Object]

INTERFACE area() setWidth(int width) setHeight(int height) ?? yesss! But where can we find information about an object’s interface? Rectangle object

Messages and Methods ,[object Object],[object Object],jump

[object Object],[object Object],switchChannel(5) openCommChannel() switchChannel(5) closeCommChannel() client receiver object Saluran Ceria Anda

[object Object],40 area() attributes: width height … behaviour: area() return width * height; message method

Object Collaboration ,[object Object],“ No object is an island”

Objects by Sufian Idris

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Viewers also liked

Viewers also liked (7)

Similar to Objects by Sufian Idris

Similar to Objects by Sufian Idris (20)

Recently uploaded

Recently uploaded (20)

Objects by Sufian Idris

Editor's Notes