Class Diagram

1

Object Oriented Analysis And Design

• 8311302 ??????????????????????????????
• Class Diagram

2
???????? Attributes ??? Methods ??? Class

• Attributes
• ???????????????? Unique Identity ??? Object ???
  Class ???? ??????????????????? ???????????????????
  ????????? ?????? ISBN ???????????????????
• ????????????????????????????? ????????????????????
  ????????? ???Class ???? ???????????????? ?
  ??????????????
• ????????????????????????????? ?
  ???????????????????????????????? ????????????????
  Class ????????????????????????????????????????????
  ???????????????????????? ???? ????????????????
  ?????????? ????????????????? ?????????????????????
  ?
• ????????????????????????? Class ????
  ???????????????????????????? ?????????????????????
  ?

3
Method

• ?????? Method ???????????? (Verb)
  ?????????????????
• ????? Method ??? Class ??? ???? Object
  ???????????

???????? ????????????????????????????????????????
?????????????????????????????????????????????????
???-???????????????????? ?????????????????????????
?? ?????? ???? ??????????????? (??????)
?????????? ?????? ????????????????????????????????
????????????????????????? ????????????????????????
? ???????????????? ????????????????????????? 1 ??
??????????????????????????????????????? 20 ???
4
Encapsulation

• ??? ?????????????????????????????????????????????
  ??????????????????????????? Class
  ??????????????????????? ???????????? ?????? Class
  ??????????? Class ??? ????????????????????????
  Class ???????????????????? ???????????????????????
  ? Public Interface
• ??????? Encapsulation ???????????????????? Class
  ???????????????
• ?????? Class ????????
• ?????? Class ??????????? Class ???
  ???????????????? ???? Attributes ??? Methods
  ?????????? Class
• ?????? Class ?????????
• ?????????????????? Class ????????????????????????
  Public Interface ???????? ?????????????????????
  Class ??????????????????????????????? Class ???
  ?????????? Information Hiding ????????????????????
  ??? Attributes ??? Methods ??? Class ?????????

5
Information Hiding

• ????????????????????? (Attributes, Methods) ???
  Class ?????????? ?????????????????????????????????
  ?? ? ????????? Class ??????????? Visibility
  ??????????? 3 ????? ???
• Private ??? Attributes/Methods ???????????????
  Private ????????????????????????
  ??????????????????????????????????
  ?????????????????????????????? Class ???
• Protected ??? Attributes/Methods ???????????????
  Protected ????????????????????????
  ??????????????????????????????????
  ?????????????????????????????? Class ??? ????
  Protected Attributes/Methods ????????????????????
  Subclass ??????????????????????????? Subclass
• Public ??? Attributes/Methods ??????????????????
  Public ???????????????????????????????????????????
  ???????????????? ????????????????????????????
  Subclass ???????

6
????????

• ???????????? Class ReaderCounter
  ??????????????????????????????????????????????????
  ??? ??????????? ReaderCounter ???????????
  ???????????????????? ?????????????????????????????
  ????? ??? ReaderCounter ??????????????????????????
  ????????????????????????? ????????????????????????
  ??????? (???????????????????????
  ??????????????????????????????????????????????)
• ??????????? 1 ??????? Class ReaderCounter ?????
  Public Attribute count ?????????????????????????
  ????????? ??????????? count ??????????????????????
  ????????????????
• ??????????? 2 ??????? Class ReaderCounter ?????
  Private Attribute count ????????????? Public
  Method enterCount ??? exitCount
  ????????????????????? count ?????????????
  ?????????? count ??????????? ????????

7
??????????????? Class, Attributes ??? Method

• ??????? Class, Attribute ??? Methods
  ?????????????????????????? ????????????????????
  Class, Attribute ??? Methods ?????
  ??????????????????????????????????????????????????
  ??????????????????????? ???? ?????????????????????
  ??? ????????????????????
• ???? ???????? Class ??????????????????????????
  (Member Card) ??? MemberCard
• ???? Class ???????????????????????????????????????
  ?????
• ???? ReaderCounter
• ???? Methods ???? Attributes ?????????????????????
  ????????????????????
• ???? memberCardId, enterCount()

8
??????????????? Class, Attributes ??? Method (???)

• ???? Methods ????????????????? Attributes
  ??????????????????? set ???????????????
  Attribute ????????????????????????????????????
• ???? Methods ????????????????? Attribute
  memberCardId ???????????? setMemberCardId
• ???? Methods ???????????????? Attributes
  ??????????????????? get ???????????????
  Attribute ???? ????????????????????????????????
• ???? Method ???????????????? Attribute
  memberCardId ???????????? getMemberCardId()

9
Association

• ?????????????????????????????????????
  ??????????????????????????????????????????????????
  ????????????????????????? ??????????????????????
• ???? ???????????????????, ????????, ????????????,
  ????????????????????????
• ?????????????????????????????????
  ????????????????? ?????????????????????????
  Association ?????????? ???????? (works at)
• ??????????????????????? ?? ????? ????????????

Multiplicity ??????????????????????????????????
Class ?????? ?????????????? Association ????
????????????????????????????? Class
???????????? ?? Association ??????? Multiplicity
10
Multiplicity

• ???????????????????????????????????????? Class
  ??????????????? Association ??? Minimum
  Multiplicity (Min-card)
• ?????????????????????????????????? Class
  ??????????????? Association ??? Maximum
  Multiplicity (Max-card)

11
????????

• ???????????????????????? (Member) ????????????
  (Member Card) ???????????????
• ??????????????? (Book) ???????????????????????????
  ?????????? 1 ???????????? 5 ????

1
0..5
12
????????

• ?????????????? (??????????????????????????????????
  ?) ???????? CD (Compact Disk) ????????????????????
  ???????????? ??????? CD ??????????????????????????
  ?? ???????????????????????????????????????????????
  ????????? CD ???????????????????????????????????
  ?????????????????????
• ????????????????? ????????????????????????????????
  ???????????????????? (Media) ????????????? ????
  ??? ????????? ????? ??????????????????????????????
  ????????????????????????? ????????????????????????
  ???????????????????????????????????????????????

0 1
0 0
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???????????????????? Association

1. One-to-one Association (1-1) ??? Association ???
   Class ?????????????? Association ?? Max-card ????
   1 ???????
2. One-to-many Association (1-M) ??? Association ???
   Class ???????????? Association ?? Max-card ???? 1
   ???????? Class ?????????????? Max-card
   ??????????????? 1
3. Many-to-many Association (M-N) ??? Association
   ??? Class ?????????????? Association ?? Max-card
   ??????? 1 ???????

14
Aggregation

• Aggregation ??? ??????????????????????????? Class
  ????????????????????? Class ??????????????????????
  Class ?????
• ??????????????????????????????????????????????????
  ??????????????????? ????
• ????????????????????? ????? ??? ?? ???
• ????????????????????????????????? Main Board,
  Ram, Rom, Disk Drive, Case
• ??? ?????????????????????? ??? ??? ?????
  ?????????????? ?
• Aggregation ????????????????? ???? 2 ?????? ???
  1-1 ??? 1-M ????????

15
???????? Aggregation ???? UML

• ?????? (Car) ????????????????????? (Engine)
  ???????????????? ?????? (Body) ??????????? ??????
  (Wheel) ????? 4 ??? ???????????????? (Boat)
  ?????????????????????????? ?????????? (Propeller)
  ??????????????? (Rudder) ??????????? UML
  ?????????

16
???????? Aggregation ???? UML

• File ????????????????? Folder ????? Folder
  ?????????????????????? Folder ?????????
  ?????????????? File ????? File ?????
  ?????????????????????????

17
????????????????? Aggregation ???? UML
??????????????????

1. ????????? (ClassRoom) ???????????????????????????
   (Student) ???????????????? ?????????????
   (Teacher) ??????? ????????????????
   (TeachingMaterial) ??????????????????????????
2. ?????????? ???????????????????????????????? ? ????

18
Composition

• ??????????????????????? ?? Aggregation ???
  Building ???????? ClassRoom ???? ClassRoom
  ??????????????????????????????? Building ???? ???
  Building ?????????????? ClassRoom
  ?????????????????????????
• ?????????????????? Building ??????????????????????
  ???? ClassRoom ???? Aggregation
  ?????????????????? Aggregation ???????????
  ???????? Composition

19
????????????????? Composition ???? UML
??????????????????

• ??????? (Book) ?????????? ????? (Cover)
  ?????????????????? ????????? (Perface)
  ??????????? (TableOfContent) ?????????????????
  (Chapter) ???????????????????????????????
  Composition ???????????????????????????? ?? ????
  ?????? ????????????????????????????????

20
????????????????? Composition ???? UML
?????????????????? (???)

• ????? (Account) ????????????????? ????????
  (AccountingGroup) ????????????????????????????
  ?????????????????? (AccountingItem) ??????????

21
Generalization

• ?????????????????????????????? ?????????
• ???? ???????????????????? (???)
  ????????????????????? (????) ???? Aggregation ???
  Association ????????????????????
  ???????????????????????????????? ?????????? ???
  ???? ????????? ??????????????????
  ????????????????? Generalization
  ?????????????????? ?????????
• ?????????
• ???????? ???????? (Sport Car) ???????????????????
  Turbo ????????????????????????????????
  ????????????????????

??????
Specialize
Generalize
????????
22
???????? ????????? Generalization ???? UML
?????? 2 Generalization ??? Animal
?????? 1 Generalization ??? Car
23
Inheritance ??? Visibility

• ????? Inheritance ????????????????? Visibility
  ??? Attributes/Methods ????????????????
  Superclass ????? Subclass ????????????????????????
  ????????????????????? ???????????
• Public Attributes/Methods ??? Superclass
  ??????????????? Public Attributes/Methods ???
  Subclass ????
• Protected Attributes/Methods ??? Superclass
  ?????????????????? Protected Attributes/Methods
  ??? Subclass ????? ?????????? Attributes ???
  Methods ??? Subclass ????????????????????????
  Superclass ??????? ??????? Method ??? ???
  Subclass ???? ?????????????? Method
  ????????????????? Inherit ???????
• Private Attributes/Methods ??? Superclass
  ??????????????? Private Attributes/Methods
  ????????? ??????????????????????????? ???????
  Method ??? Subclass ???????????????????????????
  Superclass ?????????? Attributes/Methods
  ??????????????????????????????????????
  ??????????? Protected Methods ???? Public Methods
  ???????????????????????? Superclass ????????

24
????????
???????????????????????? Inheritance ????????
Methods getAnimalType ??? setAnimalType ??????
?? Methods ?????????????????????????? animalType
??????????????? Private Attribute
??? ????????????????? Attribute animalBirthZone
??????????? ???????????????????????????????
25
Multiple Inheritance

• ??? ??????????????????????????????????????????????
  ????????????????????????????????????????????
• ???? ?????????????????????????????????
  (ComboPlayer) ?????????????????????????????
  (AudioPlayer) ???????????????? (VideoPlayer)

Class VideoPlayer ?? Method playVideo ????
Class AudioPlayer ?? Method playAudio ????????
? Class ??????????????????????????????? ComboPlaye
r ??????????????????????????? ??? ???????????
?????????? ComboPlayer ??????????? Method
changePlayMode ?????????????????? ?????????
ComboPlayer ??????????????? (?????? ??????????????
????)
26
Thank You !