🎓 Mastering Java OOP: Advanced Techniques

📚 What is Covered?

This module dives into the advanced Object-Oriented Programming techniques in Java, focusing on Composition, Encapsulation, and Polymorphism.

Composition: Modeling "has-a" relationships by assembling objects from other objects, and exposing clean delegation methods.
Encapsulation: Hiding data and simplifying interfaces to secure fields and prevent invalid state.
Polymorphism: Runtime method dispatch, factory methods, class casting, var, and instanceof with pattern matching.
Challenges: Hands-on practice combining composition, encapsulation, and polymorphism in real-world-style exercises.

In addition, Packages is covered as an extra topic:

Packages: Organizing code into modular structures and controlling access through imports and package declarations.

The project is organized into several subfolders, each focusing on a specific topic:

ComputerFactory/:
- ComputerFactory: Composition in action — building a PC from a case, monitor, and motherboard, and understanding has-a vs. is-a.
Encapsulation/:
- Encapsulation: Data hiding, validation in constructors, and simplifying public interfaces from a basic to an enhanced Player class.
Packages/:
- Packages: Package declarations and import statements to structure and share code across namespaces.
Polymorphism/:
- Polymorphism: Movie subclasses, factory methods, runtime type inspection with instanceof and pattern matching, casting, and var usage.
challenges/:
- BedroomComposition: Composition practice modeling a bedroom from walls, ceiling, bed, and lamp.
- SmartKitchen: Modeling IoT kitchen appliances with composition and delegated work.
- Printer: Encapsulation challenge with toner levels and duplex printing.
- CarTypes: Polymorphism challenge building gas, electric, and hybrid car subclasses.
- BillsBurgerChallenge: OOP Master Challenge crafting a burger restaurant app with meal orders, deluxe burgers, and pricing.