Software development is not just about writing code — it is about writing clean, maintainable, and scalable code.
As applications grow, poorly structured code becomes difficult to manage.
This week introduces structured thinking in software design using Design Patterns and Clean Architecture principles.
You will learn how professional developers organize code in real-world systems.
🎯 Learning Objectives
By the end of this week, you will be able to:
- Understand why design patterns are important
- Apply common object-oriented design patterns in Java
- Improve readability and maintainability of your code
- Separate responsibilities using layered architecture
- Refactor existing code into a modular structure
📚 Topics Covered
This week covers:
- Singleton Pattern
- Factory Pattern
- Builder Pattern
- Strategy Pattern
- DTO (Data Transfer Object) Pattern
- Layered Architecture (Controller → Service → Repository)
✅ Deliverables
By the end of this week, you should:
- Refactor your previous project using appropriate design patterns
- Separate responsibilities clearly into layers
- Participate in a structured code review discussion
🏆 Outcome
After completing this week, you will be able to:
✅ Write modular and extensible Java code
✅ Organize projects using clean architecture principles
✅ Apply design patterns appropriately (not unnecessarily)
✅ Think like a software engineer, not just a coder
📖 Navigation
⏱ Estimated Time
6 – 8 hours
Suggested breakdown:
- Study Material → 2–3 hours
- Exercises → 2 hours
- Refactoring Project → 2–3 hours
- Assessment & Discussion → 1 hour
📌 Prerequisites
Before starting this week, you should be comfortable with:
- Classes and Objects
- Interfaces
- Constructors
- Packages
- Basic OOP principles (Encapsulation, Abstraction, Inheritance, Polymorphism)
These were covered in previous weeks.