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Fall 2009ACS-3913 Ron McFadyen1 Instances & Object Diagrams Joe: Customer Class instances/ Objects An individual object (instance of a class) is shown.

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Presentation on theme: "Fall 2009ACS-3913 Ron McFadyen1 Instances & Object Diagrams Joe: Customer Class instances/ Objects An individual object (instance of a class) is shown."— Presentation transcript:

1 Fall 2009ACS-3913 Ron McFadyen1 Instances & Object Diagrams Joe: Customer Class instances/ Objects An individual object (instance of a class) is shown as a rectangle with naming information underlined See Schaum’s Outline page 134 An unnamed customer : Customer A customer named Joe

2 Fall 2009ACS-3913 Ron McFadyen2 Diagramming notation :sale s4:sale A sale object named s4 An unnamed sale object s4 An object named s4 Object instances appear in sequence and object diagrams.

3 Fall 2009ACS-3913 Ron McFadyen3 Connections between Objects sam:CarSharer toWork:Journey visitMother:Journey home:Address mothersHouse:Address work:Address Registers StartsAt EndsAt Related objects are connected with a link. Readability shows direction of the link. Note that each object appears once.

4 Fall 2009ACS-3913 Ron McFadyen4 Connections between Objects sam:CarSharer toWork:Journey visitMother:Journey home:Address mothersHouse:Address work:Address Registers StartsAt EndsAt Directed lines show direction of the link.

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