🚀 Spring Boot REST API Workshop – 5 Minute Glimpse | 19 Apr 2026 Here’s a quick 5-minute preview from our 3-hour live Spring Boot REST API workshop, where participants learned how to build backend applications step-by-step using Spring Boot. In the full session, students explored: ✅ Spring Boot project setup ✅ REST API fundamentals ✅ Controller, Service, Model structure ✅ Database connection basics ✅ API testing using Postman ✅ Real-world backend workflow This workshop was designed especially for Java beginners, students, and aspiring backend developers who want practical experience building REST APIs. 📜 Participants received: • Certificate • Source code access • Full session recording Want to join our upcoming live workshops? +91 9884789292 Subscribe to the channel for more coding workshops, backend tutorials, and developer sessions from HackForge Academy. thanks Naga Nandhini

☕ Learn Java with Me — Day 8 One variable for every value? That gets messy very fast. Today we learned something that makes code much smarter: 👉 Arrays in Java Instead of this: int a = 10; int b = 20; int c = 30; We can simply write: int[] numbers = {10, 20, 30}; Simple. Cleaner. Much more efficient. This is where Java starts feeling practical. From basics → real logic building 🚀 Week 2 already feels exciting. We’re learning together 🤝 #java #coding #arrays #learning #showup

🚀 Day 54 of My Learning Journey Today, I took my understanding to the next level by building my own Custom ArrayList in Java 🔥 Instead of just using Java’s built-in ArrayList, I implemented it from scratch to understand how it works internally. 🔹 What I Learned: How dynamic arrays work behind the scenes Managing internal array capacity Resizing logic when array gets full Implementing methods like: add() get() remove() Importance of index handling and shifting elements 💡 Key Insight: Building a custom ArrayList helped me realize how much boilerplate logic Java already handles for us in its Collections Framework. 🔹 Key Difference: ArrayList vs Custom ArrayList ✔ Java ArrayList Pre-built and optimized Handles resizing automatically Rich set of methods Well-tested and efficient ✔ Custom ArrayList Built manually by developer Basic functionality (limited features) Helps understand internal working Not optimized like Java’s version 📌 Takeaway: Using ArrayList is easy, but building one gives deep clarity on data structures and memory management 💡 Every day, I’m moving from just using concepts to truly understanding them 🚀 #Day54 #Java #ArrayList #DataStructures #Collections #CodingJourney #LearningByDoing #Programming

🎓 JAVA FULL STACK DEVELOPMENT 📍 Tap Academy | 📅 Day 39 – 41 ⚡ CORE FOCUS 🔷 Polymorphism in Action Compile-Time vs Runtime 🔥 Method Overloading (Compile-Time Polymorphism) ✔ Same method name, different parameters ✔ No inheritance required ✔ Early Binding 🔥 Method Overriding (Runtime Polymorphism) ✔ Parent → Child concept ✔ Same method & parameters ✔ Late Binding (@Override) 💡 Interfaces & Java Evolution ✔ Blueprint for abstraction ✔ Multiple inheritance support ✔ Java 8 → Default Methods 🧠 Real-Time Understanding Different systems → Different method names 👉 Same functionality ➡️ Solution: Abstraction using Interfaces 📦 OOP in Practice – Shapes 🔲 Square | ▭ Rectangle | ⚪ Circle ➡️ One Parent: Shape ➡️ One Reference → Multiple Objects 🚀 Dynamic Method Dispatch ✨ KEY LEARNINGS ✔ Overloading vs Overriding ✔ Interfaces & Java 8 ✔ Real-time abstraction ✔ Strong OOP foundation 🚀 From Learning → Implementation #Java #FullStack #OOP #Polymorphism #TapAcademy #CodingJourney #TechSkills

Day 64 of Sharing What I’ve Learned 🚀 Understanding Multithreading — From Programs to Threads After exploring how Java collections help manage and traverse data efficiently, I started looking into something equally important — how programs actually execute and handle multiple tasks. That’s where multithreading comes in. Before diving deeper into threads, I decided to revisit the fundamentals and build a clearer understanding first: 🔹Program A program is simply a set of instructions written in a language like Java. It’s what we write — but not yet running. 🔹Process When we run a program, it becomes a process. A process is an active instance of a program with its own memory and resources. 🔹Thread A thread is an independent set of code or the smallest unit of execution inside a process. Each process can have multiple threads working simultaneously. 🔹Multithreading Multithreading means running multiple threads within a single process. Instead of doing tasks one by one, we can perform multiple operations at the same time. 🔹Why it matters In real-world applications, tasks often need to happen together: 👉 Handling multiple users in an application 👉 Performing background tasks 👉 Improving performance and responsiveness Without multithreading, everything would run sequentially — slower and less efficient. 🔹Simple perspective Program → What we write Process → What runs Thread → What actually executes 🔹My realization Until now, I focused on how data is stored and traversed. Now it’s time to understand how execution can be optimized and made more efficient. 👉 Collections manage data 👉 Threads manage execution And both together are what make applications powerful. This is just the beginning — next, I’ll dive into how to create and manage threads in Java. #Java #Multithreading #Programming #JavaDeveloper #100DaysOfCode #DeveloperJourney #Day64 Grateful for guidance from TAP Academy Sharath R kshitij kenganavar

Recently while learning Spring Boot, I found myself constantly revising annotations again and again… so I decided to do something about it. I created a handwritten cheat sheet covering most of the important annotations — from Core Spring to JPA, REST, Validation, Lombok, and even a quick JWT structure overview. It’s simple, not fancy — just the way I personally understand and revise things. For example, in the first page I’ve summarized things like @SpringBootApplication, @Service, @Repository, along with JPA mappings and REST APIs in a very straightforward way. On the second page, I’ve included validation annotations, Lombok shortcuts, security basics, and JWT structure I’m still learning, so this is more like notes from a student for students — not some perfect documentation. If you’re working with Spring Boot, this might help you quickly revise concepts before coding or interviews. Would love to hear your feedback or if I should add anything more to this 🙌 #springboot #java #backenddevelopment #learninginpublic #handwritten #programming #notes #cheatsheet

Week 1 of Java class is almost in the books and what a week it's been! Our instructor Dave gave us a really solid foundation to start with. We covered declaring and assigning variables, scanner input, and conditional statements. We're also working in IntelliJ as our IDE, which was a brand new environment for me. But having experience with VS Code made it a lot easier to find my footing. To put everything into practice, I built a little project called Sandwich Shop 🥪 The program asks users 3 questions: → What size sandwich do you want? → Do you want it loaded? → How old are you? From those answers, the program uses conditional statements to figure out the price of the sandwich and whether the customer gets a discount. It's a small project, but I'm honestly really proud of it. It shows exactly what we've been learning this week and it just feels great to see it come together. I'll be posting my work here as I continue through the course, so stay tuned for more! Check out the repo: https://lnkd.in/eeiFBrUC #Java #LearningToCode #SoftwareDevelopment #CodingJourney #YearUpUnited

🚀 ArrayList Deep Dive — Beyond the Basics. (https://lnkd.in/gUuBbkwb) ArrayList, as part of Java’s Collections Framework, represents a resizable array that bridges the gap between fixed-size arrays and dynamic data structures. It allows elements to grow and shrink automatically, providing fast index-based access while handling memory management internally. Here are the key takeaways from the ArrayList session at TAP Academy by Sharath R. Sir: → Why collections can’t store primitives, and how AutoBoxing handles it → Why for-each loops are preferred in real-world scenarios → Iterator vs ListIterator — forward vs bidirectional traversal → Why add() in the middle is O(n), but get() is O(1) → The key difference between retainAll() and removeAll() One interesting takeaway: there’s no direct way to check an ArrayList’s capacity—you rely on internal behavior and documentation. Reinforces how important it is to understand internals, not just APIs. To know everything in detail I Built a small interactive study guide with quizzes and code snippets to reinforce the concepts. visit site: https://lnkd.in/gUuBbkwb #Java #DSA #Collections #LearningInPublic #SoftwareEngineering #TAPTAP Academy #ArrayList

🔥 #DoYouKnow Do you know why many beginners feel confused on Day 1 of learning Java? ☕🤯 🚨 The Problem: When we start Java, we suddenly see: ❌ class, public, static, void ❌ main() method ❌ Compilation & execution And it feels like… 👉 “What is going on?” 😅 💡 The Reality (Simple Way to Understand): Java is just telling the computer: 👉 “Start from here” (main method) 👉 “Follow these instructions” ✅ Simple Approach I’m Following: ✔ Focus on basics (syntax + structure) ✔ Understand one concept at a time ✔ Practice small programs daily ✔ Don’t panic if things feel confusing I’ve just started learning Java as part of my Full Stack journey 🚀 From HTML & CSS → now stepping into programming logic 💻 💬 If you’ve learned Java before, what confused you the most in the beginning? Share your experience in the comments 👇 #Java #Programming #CodingJourney #Beginners #LearningInPublic #FullStackDeveloper

🚀 Day 04 – Spring Boot Learning Today I explored some core concepts that make Spring powerful 👇 🔹 @Autowired Used for Dependency Injection 👉 No need to create objects using new 👉 Spring automatically injects required beans 🔹 @Bean Used for manual bean creation 👉 We define how an object should be created 👉 Mostly used for 3rd-party classes or custom logic 🔹 ApplicationContext 👉 The heart of Spring (IOC Container) 👉 Responsible for: ✔ Creating Beans ✔ Storing Beans ✔ Injecting Dependencies ✔ Managing lifecycle 💡 Simple Understanding 👉 @Bean → creates object 👉 @Autowired → uses object 👉 ApplicationContext → manages everything 🔥 Real Flow Start → Scan → Create Beans → Inject Dependencies → Ready to Serve 🚀 📌 Learning Spring is all about understanding how objects are managed automatically instead of creating them manually. #SpringBoot #Java #Backend #Learning #Day04 #DeveloperJourney