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Javier Gonzalez-Sanchez
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August 10, 2025
Programming
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CSC305 Summer Lecture 07
Individual Software Design and Development
Blackboard
(202508)
Javier Gonzalez-Sanchez
PRO
August 10, 2025
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Transcript
Dr. Javier Gonzalez-Sanchez
[email protected]
www.javiergs.info o ffi ce: 14 -227
CSC 305 Individual Software Design and Development | Summer Version Lecture 07. Blackboard
Model-View-Controller 2
Observer One More Thing
Main
Observer 5 https://github.com/CSC3100/Patterns
Observable 6 https://github.com/CSC3100/Patterns
Classroom | New Version 7 https://github.com/CSC3100/Patterns
Student | New Version 8 https://github.com/CSC3100/Patterns
Teacher | New Version 9 https://github.com/CSC3100/Patterns
Important 10 Do not reinvent the wheel! (Do not make
another implementation for classes Observer or Observable -they already exist in libraries!)
Important 11 Depreciated java.util.Observer java.util.Observable The implementation of these packages
That is NOT about the Observer pattern being depreciated.
Important 12 Use java.beans.PropertyChangeListener java.beans.PropertyChangeSupport
Classroom | Listener Version 13 https://github.com/CSC3100/Patterns
Student | Listener Version 14 https://github.com/CSC3100/Patterns
Teacher | Listener Version 15 https://github.com/CSC3100/Patterns
Scenario A 16
Scenario B 17
Singleton
Singleton 19
Singleton 20 https://github.com/CSC3100/Patterns
Singleton 21 https://github.com/CSC3100/Patterns
Warning 22 Do not Abuse of the Singleton You are
transforming OOP into Structural Programming!! 🙈
Example 1
Lab 24
Blueprint 25 M a in Dr a wAre a Dr
a wAre a Listener Repository
Main 26
DrawArea 27
DrawAreaListener 28
Repository 29
To be Continued…
Questions 31
Lab
None
CSC 305 Individual Software Design and Development Javier Gonzalez-Sanchez, Ph.D.
[email protected]
Summer 2025 Copyright. These slides can only be used as study material for the class CSC305 at Cal Poly. They cannot be distributed or used for another purpose.