One Step Deeper into Java & Backend Engineering

Hey devs 👋

Every day, I try to move one step closer to my goal: becoming a strong backend engineer with the skills to crack top product-based roles (₹10–20 LPA range). Today was all about depth over speed — not rushing, but truly understanding.

🚀 What I Learned Today:

🔸 Java’s Comparable vs Comparator
I finally cleared the confusion!

• Comparable is used for natural ordering — implemented by the class itself.

• Comparator is for custom sorting logic — defined externally.
  → I built a sorting function for a list of students by marks and name. Small project, but powerful learning.

🔸 SpringBoot: Exception Handling with @ControllerAdvice
I implemented a global error handler in my Blog App using @ControllerAdvice.
→ Now my APIs return clean, JSON-formatted errors with proper status codes. Much more production-ready!

🔸 DSA Practice (HackerRank)
Solved 3 problems:

• Easy: Frequency Count with HashMap

• Easy: Reverse Words in a Sentence

• Medium: Subarray with Given Sum (using prefix sum + HashMap)

⚒️ Skills Reinforced:

• Java OOP & interfaces

• Backend API best practices

• HashMap-based problem solving

• Clean code & error messaging in APIs

✍️ Reflection:

I’m not aiming to learn “everything fast.” I’m aiming to learn the right way. That’s how you build long-term skill, not just interview tricks.

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📌 Tomorrow’s Plan:

• Dive into SpringBoot Validation (@Valid, @NotNull, etc.)

• Solve 2 Medium DSA problems focused on sliding window & string logic

• Push today’s SpringBoot changes to GitHub ✅

Thanks for reading! If you're also on the same grind — backend, Java, SpringBoot, or DSA — let's connect and grow together 💪

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🔗 GitHub: github.com/Vinu2111
📇 LinkedIn: linkedin.com/in/vinayakgote