Java didn't just help me understand object-oriented programming. It shaped the way I think about code, systems, and software design. When I first started, I had no idea that mastering just the basics of Java would open up an entire universe of frameworks, libraries, and architectural patterns. Here's exactly how I got there. 1. Why I Stopped Skipping the main() Method In the early days, I would blindly copy-paste the public static void main block without understanding what it meant.