Java Collections Mastery for Developers (Interview Prep + Spring Boot Guide)

🚀 Master Java Collections the Right Way

Struggling with ArrayList, HashMap, or Stream API?

This guide helps you go from a basic understanding → real confidence in Java Collections and Spring Boot.

📘 What You’ll Learn

✔ Arrays vs Collections

✔ List, Set, Map, Queue

✔ Stream API (filter, map, reduce)

✔ Optional (avoid NullPointerException)

✔ Sorting & searching

✔ Spring Boot real-world usage

🎁 What’s Included

📄 Full structured PDF

📌 Capstone project

📌 30 Interview Q&A

📌 Practice problems

📌 Real-world patterns