☕ Java Mastery Project Series

A structured, project-driven journey from Java fundamentals to modern features — built with intention, documented with precision.

---

🗺️ What This Is

This isn't just a collection of Java files. It's a day-by-day learning log built around one principle: understanding comes from building.

Every project in this repo is designed to make a specific concept stick — by using it in context, not just reading about it. The roadmap goes from raw basics all the way to modern Java features like Streams and Lambdas, with each day building on the last.

---

🧱 Core Tech

Language	Java (JDK 17+)
IDE	IntelliJ IDEA / Eclipse
Concepts	OOP → Functional Programming → Stream API
Approach	Project-based, progressive complexity

---

📅 Project & Learning Log

Each row = one focused day. Concepts are hands-on, not theoretical.

Day	Project	Key Concepts	Complexity
01	🔢 Console Calculator	Variables, Scanner, if-else, switch	▓░░░░
02	⚙️ Modular Calculator	Loops, methods, control flow	▓▓░░░
03	🎓 Student Grade Manager	Classes, Objects, ArrayList, menu-driven UI	▓▓░░░
04	🏗️ OOP Foundations	Classes, Constructors, Instance Variables, Methods	▓▓▓░░
05	🔗 Advanced OOP I	Scope, No-Arg & Parameterized Constructors, Inheritance, Aggregation	▓▓▓░░
06	🧩 Advanced OOP II	Polymorphism (Overloading & Overriding), Abstraction, Encapsulation	▓▓▓▓░
07	⚡ Modern Java I	Functional Interfaces, @FunctionalInterface, Lambda Expressions	▓▓▓▓░
08	🔁 Modern Java II	Method References — Static, Instance, Arbitrary Type, Constructor	▓▓▓▓░
09	🌊 Stream API	filter, map, reduce, Pipelines, Intermediate vs Terminal Ops	▓▓▓▓▓

---

🧠 Learning Path — Big Picture

Phase 1 — Java Basics          Phase 2 — OOP Mastery          Phase 3 — Modern Java
─────────────────────          ──────────────────────          ──────────────────────
Variables & Types         →    Classes & Objects          →    Lambda Expressions
Control Flow              →    Constructors               →    Functional Interfaces
Methods & Loops           →    Inheritance                →    Method References
Scanner I/O               →    Polymorphism               →    Stream API
                               Abstraction & Encapsulation →   (Generics & Concurrency next)

---

🎯 Goal

Build rock-solid Java fundamentals through consistent, hands-on project work — with enough depth to handle real-world codebases, DSA challenges, and backend development with confidence.

This series is a foundation for:

• 💼 Software Engineering roles at product companies
• 🧮 DSA problem-solving in Java
• 🌐 Full-stack backend development (Spring Boot, APIs)

---

📈 Progress

• Java Basics & Control Flow
• Methods & Modular Design
• Core OOP (Classes, Inheritance, Polymorphism)
• Advanced OOP (Abstraction, Encapsulation, Aggregation)
• Modern Java (Lambdas, Functional Interfaces, Method References, Streams)

---

💡 Why This Repository?

This repository is not just a collection of programs.

It represents:

• consistency
• discipline
• hands-on learning
• growth through implementation

Every project here contributes toward becoming a stronger software developer.

---

Built consistently. Documented honestly. Improving daily.

⭐ Star this repo if you're on a similar journey — let's go.