From OOP confusion to understanding: My journey with encapsulation, inheritance, composition, interfaces, and polymorphism.

Java for Newbies #4 — Constructor: Building the Object Every object in Java is born through a constructor — yet most developers never really stop to ask what happens when we call new. In this session, I break down how a constructor actually builds the object — from memory allocation to initialization — and why it’s much more than just a “method without a return type.” If you’re learning Java seriously, this one is essential. -Watch the full lecture on YouTube https://lnkd.in/gSNRmess -The detailed blog is already published — no need to make notes, it’s all there. ♻ Repost to help others for learning. 👤 Follow me for more. Nitin Singh 👤 Subscribe here: nitinsingh717.substack.com ▶ Watch videos: youtube.com/@nitinsingh717 #javafornewbies #java #levelupyourprogrammingwithnitin

I've been diving deep into #Java and "full #OOP mode" lately, and I have to be honest...🤔 At first, it felt verbose and a little complicated. My brain was spinning trying to get used to the new way of thinking. But now, I've been pleasantly surprised! As I get more comfortable, I'm genuinely impressed on how organized and structured OOP encourages you to be. That initial "complexity" is turning out to be a powerful tool for clarity.💡 Another important "click" for me was encapsulation. It seems like a bunch of unnecessary work when you start learning about it in a solo project, right? But as the code becomes more complex, it's nice to see how those barriers really help in avoiding mistakes! What's a programming concept that felt complicated to you at first but you eventually grew to love? #ObjectOrientedProgramming #Encapsulation #SoftwareDevelopment #LearnToCode #DeveloperJourney

The VS Code ecosystem is unreal. • You can write Python in VS Code • You can write Java in VS Code • You can write Shell scripts in VS Code • You can build Dockerfiles in VS Code • You can write Terraform in VS Code • You can manage Git from VS Code • You can edit YAML files in VS Code

🚀 Week 5 of My Java Learning Journey! This week, I explored String Concepts in Java — one of the most powerful and commonly used data types! 🔤 It was exciting to understand how Strings work internally and how many different operations can be performed using built-in methods. 💻 🧩 Key Learnings: What is String & how it is stored in memory String vs StringBuilder vs StringBuffer String methods (length, charAt, substring, indexOf, equals, compareTo, replace, trim, split, etc.) Immutable vs Mutable strings String concatenation & performance 💻 Practice Programs: Reverse a string Count vowels & consonants Check palindrome string Compare two strings Word / character frequency Splitting sentences into words 📝 Extra Skill: Explored performance difference between String vs StringBuilder using loop concatenation 🔗 Check out my Week 5 GitHub repo: https://lnkd.in/giiR_G86 Excited for Week 6, where I’ll dive into Object-Oriented Programming (OOPs) Concepts — taking Java to the next level! 🚀 #Java #Programming #CodingJourney #Git #GitHub #100DaysOfCode #Learning #Backend #Strings

🚀 Week 4 of My Java Learning Journey! This week, I explored Methods and Arrays — the building blocks that make Java programs modular and data-driven! 🧠 It was exciting to understand how methods simplify code and how arrays efficiently store and manipulate data. 💻 🧩 Key Learnings: Methods: Definition, Parameters, Scope Static methods and why they’re important Calling and Returning Methods Arrays: One-Dimensional & Two-Dimensional Array operations: Sorting and Searching 💻 Practice Programs: Array operations: Find Max, Min, Reverse, Sum Menu-based Array Application Method-based problem solving and modular programs 📝 Extra Skill: Improved code organization and reusability using methods 🔗 Check out my Week 4 GitHub repo: https://lnkd.in/gPAqMUPf Excited for Week 5, where I’ll dive into String Concepts — taking Java to the next level! 🚀 #Java #Programming #CodingJourney #Git #GitHub #100DaysOfCode #Learning #Backend

🎯 Java Bootcamp – Day 3 Highlights 💡 Object-Oriented Programming (OOP) Unlocked! Today’s session was a deep dive into the world of OOP — the secret sauce behind clean, scalable, and real-world Java applications. Here's what I tackled: 🧱 OOP Foundations 🔹 Class = Blueprint | Object = Real-world instance 🔹 Why OOP? Because modular, reusable code is the future! 🛠️ Constructors & Methods 🔹 Used constructors to auto-initialize object data 🔹 Built methods that do things and return results (like calculating interest!) 🧯 Error Handling 101 🔹 Explored try-catch to gracefully handle runtime errors 🔹 No more crashes — just clean, safe execution! 💰 Hands-On Project: BankAccount App 🔹 Built a class with deposit(), withdraw(), and displayBalance() 🔹 Added error checks for smoother user experience 🔹 Practiced real-world logic with clean OOP structure Each concept added a new layer to my Java mindset. Can’t wait to keep building smarter and cleaner code as the bootcamp continues! 💻🔥 #JavaBootcamp #Day3 #OOPinJava #LetsUpgrade #TechJourney #StudentDeveloper #ParulUniversity #100DaysOfCode #CodeWithPraneel #BuildInPublic

Mastering Github Codespaces Unit 1: Basic Concepts and Installation Git, GitHub & Codespaces #MyStartup #Git #Github #GithubCodeSpaces #VScode #EspIDF #Arduino #JavaCsript #NodeJs #Python #C++ #Docker #Copilot #GithubActions #Genkit #CompileInTheCloud #InstallLocally #ToolChainHell

🧩 I still remember when my Spring Boot API refused to return JSON… I spent hours debugging, only to realize I used the wrong annotation. 😅 That day, I finally understood the difference between 👉 @Controller and @RestController And trust me — this tiny detail can make a big difference. So I turned that learning into a simple visual guide 👇 💡 In this carousel, you’ll learn: ✅ What each annotation actually does ✅ When to use one over the other ✅ And… the BIG question — 👉 What happens if you use both together? Hint: one silently wins the battle 👀 💬 Drop your guess in the comments! And share this if it helped you or your team avoid that “why is my JSON not returning?” moment 😅 #SpringBoot #Java #BackendDevelopment #Microservices #CodeTips #SoftwareEngineering #Developers #LearningInPublic #TechCommunity #Programming #CareerInTech #RestAPI

One of the long-pending learning items for me was to have a deep dive into the reactive programming paradigm and extend the knowledge of it in real-life implementation of scalable microservice with real use cases. With Java virtual thread on the horizon, it always confused me whether it is viable to invest in learning the reactive programming stack or not. Another thing is, if we already have an event loop in place for frameworks like NodeJS or Next, which have streams as first-class support, why again learn a similar framework like the Reactive framework specifically Project Reactor? - The answer lies in superior support for reactive streams with backpressure, multi-threaded support, and composition operators, and may be many other things.. I purchased this course long ago. This is a great course to get the fundamentals cleared for reactive programming. https://lnkd.in/g2Ujexip #learning 😃 #java #reactiveprogramming