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Object-Oriented Programming (Java), Unit 15

Kirk Scott

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Simple UML with Visio

• 15.1 Static Structure Diagrams for Classes and Objects

• 15.2 Association, Aggregation, and Composition

• 15.3 Inheritance, Interfaces, and Inner Classes

• 15.4 Sequence Diagrams

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15.1 Static Structure Diagrams for Classes and Objects

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15.1.1 Classes

• Name, attributes, and operations

Cup Seed

+operations()

-attributes

Cup

+operations()+setSeedCount()+getSeedCount() : int

-seedCount : int = 0

Cup

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15.1.2 Objects

• Name, name of class, attribute values

my seed cup : Cup

seeds = 0

my seed cup : Cup

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15.1.3 Instances of Classes

-seeds

Cup

seeds = 0

my seed cup : Cup

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15.2 Association, Aggregation, and Composition

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15.2.1 Binary Associations

• Any kind of relationship• Implemented in any way• Cardinality, navigability, labeling

CupSeedDistributor

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-adds seeds

0..*

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15.2.2 Aggregations

• “has-a” relationship = whole to parts relationship

• May be expressed using a verb more specific than “has”

• Cardinality• May be labeled on both ends

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Cup

ArrayList

Seed

1

-has1

1

-has0..*

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15.2.3 Compositions

• Like an aggregation, except that the whole cannot exist without the part(s)

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Cup

ArrayList

Seed

1

-has1

1

-has0..*

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15.3 Inheritance, Interfaces, and Inner Classes

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15.3.1 Inheritance

• Subclasses refer to their superclasses

Point2D

Point Point2D.Double Point2D.Float

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15.3.2 Interfaces

• “realizes” in European quotation marks may be added as a label.

FoodV5

PackagedFoodV5 BulkFoodV5

TaxedPackagedFoodV5 TaxedBulkFoodV5

«interface»Taxable Interface

GuillemetsFrom Wikipedia, the free encyclopedia

  (Redirected from Guillemet)

• Guillemets (pronounced /ˈɡɪləmɛt/, or /ɡiːəˈmeɪ/ after French [ɡij(ə)mɛ]), also called angle quotes, are line segments, pointed as if arrows (« or »), sometimes forming a complementary set of punctuation marks used as a form of quotation mark. The symbol at either end – double « and » or single ‹ and › – is a guillemet. They are used in a number of languages to indicate speech. They are also used as symbols for rewind and fast forward.

• Etymology• The word is a diminutive of the French name Guillaume (whose

equivalent in English is William), after the French printer and punchcutter Guillaume le Bé (1525–1598).[1][2] Some languages derive their word for guillemets analogously; for example, the Irish term is Liamóg, from Liam 'William' and a diminutive suffix.

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GuillemotFrom Wikipedia, the free encyclopedia

Jump to: navigation, searchFor other uses, see Guillemot (disambiguation).

• Guillemot is the common name for several species of seabird in the order Charadriiformes, and the auk family, comprising two genera: Uria and Cepphus. This word of French origin apparently derives from a form of the name William, cf. the Welsh: Gwillim or the French: Guillaume.[1]

• The Uria are known as murres in North America and, together with the Razorbill, Dovekie and the extinct Great Auk, make up the tribe Alcini. They have distinctly white bellies, thicker, longer bills than Cepphus and form very dense colonies on cliffs during the reproductive season.

• The three species of Cepphus - for which the term "guillemot" is generally reserved in North America - form a tribe of their own: Cepphini. They are smaller than the Uria species, have black bellies, rounder heads and bright red feet.

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Merriam-Webster’s Online Dictionary

• Main Entry: guil·le·mot • Pronunciation: \ˈgi-lə-ˌmät\• Function: noun • Etymology: French, from Middle French,

diminutive of Guillaume William• Date: circa 1672• 1 British : a common murre (Uria aalge)

2 : any of a genus (Cepphus) of narrow-billed auks of northern seas

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A Common Guillemot Between Two Brunnich’s Guillemots

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The Pigeon Guillemot

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The Ancient Murrelet

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The Marbled Murrelet

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If the interface is given in full elsewhere this notation can save lines in the

diagram.

TaxedBulkFoodV5

TaxedPackagedFoodV5

Taxable

Taxable

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15.3.3 Inner Classes

• This is the official notation.

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This is the nearest equivalent I could find in Visio.

Point2D Point2D.Double

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15.4 Sequence Diagrams

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15.4.1 Sequence Diagrams

• Objects, lifelines, activation rectangles• Message passing = calling methods

and returning• Although not shown in these examples,

messages may be labeled to specify parameters and return values

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A call of a method on one object, which triggers a second call:

distributor object

addSeeds()

distribute()

cup object

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Calling a method within the same class

distributor object

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15.4.2 A Larger Sequence Diagram Example

Let this code be given:

• public abstract class Food• {• private String brand;• private String productName;• private String units;• …• public void setBrand(String brandIn)• {• brand = brandIn;• }• public String getBrand()• {• return brand;• }• …

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• public void setBrandToThisBrand(Food anotherFood)• {• String tempBrand = anotherFood.getBrand();• setBrand(tempBrand);• }• …• public abstract double getUnitCost();• }

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• public class PackagedFood extends Food• {• private double size;• private double itemCost;• …• public void setSize(double sizeIn)• {• size = sizeIn;• }• public double getSize()• {• return size;• }• …• public double getUnitCost()• {• return itemCost / size;• }• }

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Suppose the following is done in a calling program:

• PackagedFood myfood = new PackagedFood(…);

• PackagedFood yourfood = new PackagedFood(…);

• …

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Suppose this call is then made:

• myfood.setBrandToThisBrand(yourfood);• The corresponding sequence diagram is shown on the

next overhead.

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myfood yourfood

setBrandToThisBrand(yourfood)

getBrand()

tempBrand

setBrand(tempBrand)

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The End