Validating Request Data with Spring Boot Annotation

what is Constructor Injection in Spring Boot Constructor Injection in Spring Boot is a  dependency injection technique where  required dependencies are  provided through a class constructor  instead of  field or setter injection. constructor-injection-in-spring-boot. . . . . . . . . . #Java #JavaProgramming #JavaDeveloper #JavaCode #JavaScript #JavaCommunity #JavaTutorial #JavaLearning #JavaDevelopment #JavaLife #JavaLovers #JavaProjects #JavaCoding #JavaTips #JavaFramework #Java8 #JavaEE #JavaForBeginners #JavaGeek #JavaWorld #hackforge #hackforge_academy

Overview of Login & Register  API Login & Register API in spring boot A Register API stores new user  details in the database, while a Login  API verifies user credentials  (email and password). login-register-api-in-spring-boot. . . . . . . . . . #Java #JavaProgramming #JavaDeveloper #JavaCode #JavaScript #JavaCommunity #JavaTutorial #JavaLearning #JavaDevelopment #JavaLife #JavaLovers #JavaProjects #JavaCoding #JavaTips #JavaFramework #Java8 #JavaEE #JavaForBeginners #JavaGeek #JavaWorld #hackforge Learn more coding concepts daily with HackForge Academy 🌐 https://www.hackforge.in 📞 9884789292

Everything you need to know about Spring Security in one place! From SecurityFilterChain to JWT vs Session — this cheat sheet covers it all. Bookmark this before your next Spring Boot project #springsecurity #SpringSecurity #SpringBoo #Java #JWT #WebSecurity #BackendDevelopment #JavaDeveloper #Programming #SoftwareEngineering #REST #APIDesign #TechTips #Developer

🚀 ArrayList vs LinkedList – Choosing the Right Tool In Java, the choice of data structure can make or break performance. Here’s a quick breakdown: 🔹 ArrayList Backed by a dynamic array Fast random access (O(1)) Best for frequent reads 🔹 LinkedList Doubly linked nodes Efficient insertions/deletions at head or tail (O(1)) Best for frequent modifications 💡 Rule of Thumb: Read often? Use ArrayList. Modify often? Use LinkedList. #TapAcademy #Java #DataStructures #CodingTips #LinkedList #ArrayList #Programming

Day3 - Understanding Java Array List !! 👉 List interface promises that the elements maintain the order in which they are added. That means it is an ordered Collection. List implementations do not sort the elements. 👉 The array elementData is initialised with a default size of 10 👉 Formula for creating a new capacity is ((old size * 3) / 2) + 1 #java #coding

Day 7 of learning Java 🚀 Practiced basics today by building an Even/Odd checker. Using simple logic with if-else is starting to make sense 👍 Small steps but consistent progress 💻 Github-->https://lnkd.in/gfirjTVh #Java #Practice #LearningInPublic

# Executor Service in Java * What is ExecutorService? ExecutorService is a framework to manage and control thread execution. You don’t create threads manually… it manages them for you. ⸻ * Why use it? Without it → manual thread handling 😓 With it → controlled & reusable threads ⸻ * What can it do? ✔ Manage thread pool ✔ Execute tasks asynchronously ✔ Improve performance ⸻ * Common Types: • FixedThreadPool • CachedThreadPool • SingleThreadExecutor ⸻ * Simple Flow: 1. Submit task 2. Thread executes 3. Result returned #Java #ExecutorService #Multithreading #BackendDevelopment #Programming

Day 15 of Java I/O Journey Today I learned about WatchService in Java 👀 This feature allows us to monitor file system changes in real time. 🔹 What it does • Tracks file creation, modification, and deletion • Works on directories to detect changes automatically 🔹 How it works • Register a directory to watch • Listen for events • Process changes with custom logic 🔹 Important Methods • register() → Register directory for monitoring • take() → Waits for events (blocking) • poll() → Checks events (non-blocking) 🔹 Real Use Cases • Automatic backup systems • Live code compiling • Log file monitoring 💡 This concept is powerful for building real-time systems and automation tools. Learning Java is not just about syntax, it’s about building practical solutions step by step ⚡ Have you ever worked with file monitoring or automation? #Java #JavaIO #Programming #Coding #SoftwareDevelopment #Developers #LearningInPublic #100DaysOfCode #CodingJourney #JavaDeveloper #BackendDevelopment #TechSkills #HariomKumar #Hariom #Hariomcse

Day 18 – Understanding List vs Set vs Map in Java After exploring different collections individually, today I learned how they compare with each other. 🔹 List (ArrayList) – Stores elements using index, allows duplicates, maintains order 🔹 Set (HashSet) – Stores only unique elements, no duplicates, unordered 🔹 Map (HashMap) – Stores data in key–value pairs, keys must be unique 💡 Key takeaway: Choosing the right data structure is important for writing efficient and clean code. This comparison helped me clearly understand when to use each collection type. #Java #Collections #ArrayList #HashSet #HashMap #Programming #LearningInPublic #Day18