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https://github.com/osspk/factory-singleton-and-strategy-design-patterns_examples
🐉 Solved problems demonstrating the use of Factory, Singleton and Strategy Design Patterns using Java. These problems were solved during the course "Object Oriented Analysis and Design CS309"
https://github.com/osspk/factory-singleton-and-strategy-design-patterns_examples
behavioral-patterns creational-patterns design-patterns design-patterns-implemented-in-java factory-method factory-pattern object-oriented-design singleton-pattern strategy-design-pattern strategy-pattern
Last synced: about 1 month ago
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🐉 Solved problems demonstrating the use of Factory, Singleton and Strategy Design Patterns using Java. These problems were solved during the course "Object Oriented Analysis and Design CS309"
- Host: GitHub
- URL: https://github.com/osspk/factory-singleton-and-strategy-design-patterns_examples
- Owner: OSSpk
- License: mit
- Created: 2018-07-02T14:47:14.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2024-11-22T11:59:01.000Z (about 1 month ago)
- Last Synced: 2024-11-22T12:37:06.920Z (about 1 month ago)
- Topics: behavioral-patterns, creational-patterns, design-patterns, design-patterns-implemented-in-java, factory-method, factory-pattern, object-oriented-design, singleton-pattern, strategy-design-pattern, strategy-pattern
- Language: Java
- Homepage: https://github.com/harismuneer
- Size: 48.8 KB
- Stars: 1
- Watchers: 3
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
- License: LICENSE
Awesome Lists containing this project
README
# Examples Demonstrating Factory, Singleton and Strategy Design Patterns 🐉
[](#)
[](https://www.github.com/harismuneer/Factory-Singleton-and-Strategy-Design-Patterns_Examples/fork)
[](https://www.github.com/harismuneer/Factory-Singleton-and-Strategy-Design-Patterns_Examples/issues)
[](#)
To study more about Design Patterns, visit [Source Making Design Patterns](https://sourcemaking.com/design_patterns)
## Factory Method
Q1: In a ‘Drawing’ system, depending on user’s input, different pictures like square, rectangle, circle can be drawn. Here we can use factory method to create instances depending on user’s input. For adding new type of shape, no need to change client’s code.
Q2: In travel site, we can book train ticket as well bus tickets and flight ticket. In this case user can give his travel type as ‘bus’, ‘train’ or ‘flight’.
Here we have an abstract class ‘AnyTravel’ with a static member function ‘GetObject’ which depending on user’s travel type, will create & return object of ‘BusTravel’ or ‘ TrainTravel’. ‘BusTravel’ or ‘ TrainTravel’ have common functions like passenger name, Origin, destination parameters.
## Strategy and Singleton Patterns
Q. You are asked to develop a mobile application for a Famous Shopping Cart system.
This application has the option for the user to shop in either an online mode or in an offline mode. If the user is connected to the network, your application would fetch the product list from the server, which will be called by the NetworkManager and if the user is not connected to the server the product list will be fetched from local database using
DatabaseManager. You have a product object which contains product id, name and price.
The database manager and network manager has one method getProductList which will return array of products.
Note: You will require a global method in your main named bool checkAccessibility() it will return true if internet is connected and false if internet is not connected
Hint: Use singleton and strategy pattern.
## How to Run
1- Install these:
* [Java SE Development Kit 8 (JDK 8)](http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html)
* After installing JDK 8, install [NetBeans IDE](https://netbeans.org/downloads/)
2- Open NetBeans IDE. Click on File -> Open Project and browse to the project you want to open say "Factory Method" and select it. It will load the NetBeans project. (There are basically two separate NetBeans Projects named *Factory Method* and *Strategy and Singleton Patterns*)
## Author
You can get in touch with me on my LinkedIn Profile: [](https://www.linkedin.com/in/harismuneer)
You can also follow my GitHub Profile to stay updated about my latest projects: [](https://github.com/harismuneer)
If you liked the repo then kindly support it by giving it a star ⭐ and share in your circles so more people can benefit from the effort.
## Contributions Welcome
[](https://www.github.com/harismuneer/Factory-Singleton-and-Strategy-Design-Patterns_Examples/issues)
If you find any bugs, have suggestions, or face issues:
- Open an Issue in the Issues Tab to discuss them.
- Submit a Pull Request to propose fixes or improvements.
- Review Pull Requests from other contributors to help maintain the project's quality and progress.
This project thrives on community collaboration! Members are encouraged to take the initiative, support one another, and actively engage in all aspects of the project. Whether it’s debugging, fixing issues, or brainstorming new ideas, your contributions are what keep this project moving forward.
With modern AI tools like ChatGPT, solving challenges and contributing effectively is easier than ever. Let’s work together to make this project the best it can be! 🚀
## License
[](../master/LICENSE)
Copyright (c) 2018-present, harismuneer
Hey there, I'm Haris Muneer 👨🏻💻
- 🕸️ Founder of Cyfy Labs: At Cyfy Labs, we provide advanced social media scraping tools to help businesses, researchers, and marketers extract actionable data from platforms like Facebook, Instagram, and X (formerly Twitter). Our tools support lead generation, sentiment analysis, market research, and various other use cases. To learn more, visit: www.cyfylabs.com
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