Implementing Spring Dependency Injection with XML Configuration

🚀 Day 55 of #100DaysOfCode — Getting Started with Multithreading in Java Over the past 2 days, I explored one of the most important concepts in Java: Multithreading 🔥 💡 What I Learned 🧵 What is Multithreading? Multithreading allows a program to execute multiple tasks simultaneously, improving performance and efficiency ⚡ 👉 Instead of running tasks one after another, we can run them in parallel. ⚙️ Creating Threads in Java 1️⃣ Using Thread Class Extend the Thread class Override the run() method Start using start() 2️⃣ Using Runnable Interface (Best Practice ✅) Implement Runnable Pass it to a Thread object Start execution using start() 🧠 Key Takeaways ✔ Runnable is preferred over Thread (better design & flexibility) ✔ Supports multiple inheritance ✔ Separates task from execution ✔ Helps in building scalable backend systems ⚠️ Important Concept 👉 Difference between: run() ❌ (normal method call) start() ✅ (creates new thread) 🔥 Real-World Use Cases Backend APIs Payment systems Real-time applications Inventory & billing systems (like the one I'm building 🏪) 🚀 What’s Next? ➡️ Synchronization ➡️ Race Conditions ➡️ ExecutorService (Thread Pool) Learning multithreading feels like unlocking a new level in Java 💪  Huge thanks to my mentor Suresh Bishnoi for simplifying complex concepts like multithreading and pushing me to keep learning consistently. #Java #Multithreading #100DaysOfCode #BackendDevelopment #LearningJourney

🚀 Mastering Exception Handling in Java Every program runs smoothly… until it doesn’t. That’s where Exception Handling becomes a game-changer. 💡 What is Exception Handling? It’s a mechanism in Java that helps manage runtime errors, ensuring the program doesn’t crash unexpectedly and continues execution gracefully. ⚙️ Why It Matters? ✔ Prevents abrupt program termination ✔ Improves code reliability and stability ✔ Enhances user experience by handling errors smartly 🧠 Key Concepts I Explored 🔹 try-catch – Safely handle risky code 🔹 finally – Ensures important code always runs 🔹 throw – Manually trigger exceptions 🔹 throws – Declare possible exceptions 📈 What I Learned ✨ Writing safer and cleaner code ✨ Identifying and debugging errors effectively ✨ Building confidence in handling unexpected scenarios 🔥 Key Takeaway “Errors are not failures — they are opportunities to make your code stronger.” Consistency + Practice = Growth 💪 #Java #ExceptionHandling #Programming #CodingJourney #Learning #50DaysOfCode #TapAcademy

🚀 Day 5 | Advanced Java Learning Journey 📌 Topic : Dependency Injection in Spring Framework Continuing my journey with Spring Framework, today I explored one of its most important concepts — Dependency Injection (DI) 🔹 What is Dependency Injection? ✔ DI is a design pattern used to achieve loose coupling ✔ It allows one object (Bean) to inject dependencies into another ✔ Instead of creating objects manually, Spring manages them 👉 In simple terms: Don’t create objects — let Spring provide them ✅ 🔹 Types of Dependency Injection ✔ Setter Injection ✔ Constructor Injection ⭐ (Recommended) 🔹 What is Autowiring ? ✔ Autowiring automatically injects dependencies ✔ Reduces manual configuration 🔹 Types of Autowiring ✔ ByType ✔ ByName ✔ Constructor ✔ @Autowired ⭐ 🔹 Example Concept ❌ Car creates Engine using new ✅ Spring injects Engine automatically 🔹 Key Advantages ✔ Loose Coupling ✔ Clean Code ✔ Better Maintainability ✔ Faster Development 💡 Key Takeaway : Dependency Injection is the heart of Spring that makes applications scalable and maintainable 🚀 🙏 Special thanks to Vaibhav Barde Sir for continuous guidance #AdvancedJava #SpringFramework #DependencyInjection #Autowiring #JavaDeveloper #BackendDevelopment #LearningJourney

🚀 Day 75 — LeetCode Practice 🚀 Today’s problem: To Lower Case 💡 What I learned today: • Understood how to convert characters using built-in string methods • Learned the importance of string immutability in Java • Practiced writing clean and minimal code • Realized that sometimes the simplest problems reinforce core concepts 🧠 Key Idea: Use Java’s inbuilt function: toLowerCase() → converts all uppercase letters to lowercase easily 🔥 Takeaway: Not every problem needs complex logic — knowing the right method saves time ⏱️ Consistency > Complexity 💯 #Day75 #LeetCode #Java #DSA #CodingJourney #Consistency #Learning

🚀 Day 7/30 – Real-World Java Development Today I spent some time revisiting OOP concepts, especially constructors. Earlier, I used to think constructors are just for initializing values. But now I’m starting to see how important they are when creating objects in a structured way. In real applications, whenever we create something like a user, order, or product, we need a proper way to initialize all required data. That’s where constructors make things cleaner and more controlled. Instead of setting values randomly, everything gets initialized at the time of object creation itself. It’s a small concept, but it actually helps in writing more organized and predictable code. Still exploring more around OOP 👍 #30DaysChallenge #Java #OOP #BackendDevelopment #LearningJourney

🚀 Day 29–33 of My Java Full Stack Development Journey In these days, I explored one of the most important concepts in Java — the Anatomy of a Java Class and its Execution Flow. I learned how Java programs are structured into Static (Class-Level) and Instance (Object-Level) components. 🔹 Static (Class-Level) Static variables and blocks belong to the class, not objects Loaded once during class loading Static methods (like main) cannot directly access instance variables 🔹 Instance (Object-Level) Instance variables and methods belong to individual objects Created when an object is instantiated Follow proper POJO standards (private variables + getters/setters) 💡 One of the key takeaways was understanding the Lifecycle of Execution in Java: 1️⃣ Class Loading Phase JVM loads the class Static variables are initialized Static blocks are executed 2️⃣ Object Creation Phase Memory is allocated for instance variables Instance blocks are executed 3️⃣ Constructor Execution Phase Constructor runs last Finalizes object initialization This helped me clearly understand how Java executes step by step internally, which is very important for writing optimized and bug-free code. Grateful to Tap Academy for helping me build strong fundamentals step by step 🙌 #Day29 #Day30 #Day31 #Day32 #Day33 #Java #OOP #Programming #FullStackDevelopment #JavaDeveloper #LearningJourney #CodingJourney #TapAcademy

How Netflix uses Java - 2026 edition, now published from JavaOne. I hope you enjoy the talk! I’m going into: - GraphQL based architecture - Our Spring Boot based Java stack - Testing - Large scale migrations with AI - Building Spring AI agentic workflows https://lnkd.in/gYb3wyhs

Interesting insights from Paul Bakker on the practical side of Virtual Threads and ZGC at Netflix scale. Great watch for any JVM engineer.

Netflix streams to 260 million people simultaneously. 📺 The backbone holding that together? Java.💪🔥 Here's how Netflix uses it: #Java #Enterprise https://lnkd.in/ejE2Z2Uf

I keep on returning to Paul Bakker’s talks on how they use #Java at Netflix year after year. I see it as a down-to-earth tutorial on the application of both the Java language’s new features and its low-level improvements to a real-world company -albeit a gigantic one. This year he talks about #GraphQL (going as far as showing, jokingly, a “REST in peace” meme), the G1GC vs. Generational ZGC comparison (TL;DR they adopted Generational ZGC by default) and the strategies they use to keep up with the upgrades in open-source libraries (such as the #Spring ecosystem). But what I have enjoyed the most was his walkthrough of the current way the Java language handles concurrency with the use of virtual threads, structured concurrency and -in a lesser way- scoped values. He concludes that many third-party libraries still rely heavily on ThreadLocal to maintain state such as security info or observability (Micrometer, Spring Security); and there is no bridge between this and each virtual thread’s scope -at least not yet. The Java team should take the baton now and keep on evolving the language as they have been doing with amazing success these last few years. #Java #JVM #Concurrency