CSC307 Lecture 11

Introduction to Software Engineering
Design Patterns II
(202307)

Transcript

1. jgs CSC 307 Introduction to Software Engineering Lecture 11: Design Patterns II Dr. Javier Gonzalez-Sanchez javiergs@calpoly.edu www.javiergs.com Building 14 -227 Office Hours: By appointment
2. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 3 GoF Patterns
3. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 4 Scenario 1
4. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 5 Scenario 2
5. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 6 Scenario 3
6. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 7 Key Idea Observer vs. Listener
7. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 8 GoF Patterns
8. jgs Singleton
9. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 10 Singleton
10. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 11 class MainApp { public static void Main(String []a){ Singleton s1 = Singleton.getInstance(); Singleton s2 = Singleton.getInstance(); // Test for same instance if (s1 == s2){ // true - Objects are the same instance } } } Singleton
11. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 12 class Singleton{ private static Singleton _instance; private Singleton() {} public static Singleton getInstance(){ if (_instance == null){ _instance = new Singleton(); } return _instance; } } Singleton
12. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 13 Let’s Work
13. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 14 Project – User create dots
14. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 15 Project – User selects Cluster and clicks Run ✅
15. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 16 Project – User selects Cluster and clicks Run ✅
16. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 17 Project – User selects Line and clicks Run ✅
17. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 18 Project – User selects Line and clicks Run ✅
18. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 19 Project – User selects Line and clicks Run ✅ ✅
19. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 20 Project – User selects Cluster and clicks Run ✅ ✅
20. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 21 Questions
21. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 22 Office Hours Tuesday and Thursday 3 - 5 pm But an appointment required Sent me an email – javiergs@calpoly.edu
22. jgs
23. jgs CSC 307 Introduction to Software Engineering Lab 11: Getting Started with Assignment 02 Dr. Javier Gonzalez-Sanchez javiergs@calpoly.edu www.javiergs.com Building 14 -227 Office Hours: By appointment
24. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 25 Let’s Work
25. jgs CSC 307 Introduction to Software Engineering Javier Gonzalez-Sanchez, Ph.D. javiergs@calpoly.edu Summer 2023 Copyright. These slides can only be used as study material for the class CSC308 at Cal Poly. They cannot be distributed or used for another purpose.