Spring vs Spring Boot: Java Frameworks Compared

Most people use Spring Boot. But very few understand what actually happens when the application starts While going deeper into it, a few things started making more sense How the application context is created What SpringBootApplication really triggers How the bean lifecycle actually works Why proxies are used for things like Transactional And how self invocation can silently break things It is easy to write Spring code Understanding what happens inside is different Still learning and connecting the dots What part of Spring feels confusing to you #Java #SpringBoot #BackendDevelopment #SoftwareEngineering #JavaDeveloper #SystemDesign #Placements

Spring Boot 4.1.0-M4 is out now and if you are using M3 there is something you should know. They changed their mind about the RabbitMQ updates. So if you made changes to those settings you need to change them Also that problem where the application.properties file was not working right? It is fixed now. Now let us look at the picture. Spring Boot 4 is like a new beginning. It uses Spring Framework 7. It needs JDK 17 to work. It also has some features like trying again if something fails and it is safer when dealing with empty values. It even supports versions of REST without needing extra work. If you are still using Boot 3.x do not worry. They also released 3.5.13 on the day. You are not behind. If you are starting a new project in 2026 Spring Boot 4 is the way to go. You should start reading the guide on how to move to Boot 4 before your team tells you to do it when you're, in a hurry. #SpringBoot #Java #BackendDevelopment #FullStackDeveloper #SoftwareEngineering #JavaDeveloper #REST #SpringFramework #Microservices #Coding #SoftwareDeveloper #TechNews #OpenSource #DeveloperLife

🚀 30 Days of Spring Boot – Day 1 Today I covered the core fundamentals of Spring & Spring Boot 👇 🔹 What is Spring? A powerful Java framework used to build scalable and enterprise applications with features like IoC and DI. 🔹 What is Spring Boot? An extension of Spring that makes development faster with auto-configuration, embedded servers, and minimal setup. 🔹 IoC (Inversion of Control) Spring manages object creation and lifecycle instead of developers doing it manually. 🔹 Dependency Injection (DI) Dependencies are injected by Spring → making code loosely coupled and easy to test. 💡 Built a small project using: @Component @Service @Autowired ✔ Layered architecture (Controller → Service → Component) 📌 Key Learning: Don’t create objects manually — let Spring handle it! #SpringBoot #Java #BackendDevelopment #Microservices #LearningJourney #30DaysChallenge #Developers #Coding

📘 Spring Notes – 4 Understanding Dependency Injection is one thing… Implementing it is where the real learning happens 💻 Today I worked on: ✔️ Setter vs Constructor Injection ✔️ Autowiring ✔️ Spring Bean Configuration (XML) Also pushed my practice code to GitHub: 👉 https://lnkd.in/gN-j5n3V Slowly building strong backend fundamentals 🚀 Follow for daily updates on my Spring journey. #Java #SpringBoot #Backend #Developers #Learning #TechJourney

Last week our Spring Boot service froze completely under load. No errors. No exceptions. Just requests piling up and users  seeing blank screens. Turns out it was thread pool exhaustion — one of the most  common production issues that looks nothing like what it is. I wrote a detailed breakdown of: → How we diagnosed it using thread dumps and Actuator metrics → Why adding timeouts was the immediate fix → How we properly solved it with async thread pool isolation → What to check in your own Spring Boot service right now Full article link in the comments 👇 If you are building Java microservices — this one is worth  bookmarking. #Java #SpringBoot #Backend #Microservices #SoftwareEngineering  #Programming #BackendDevelopment #TechBlog

⚙️ One Spring Boot Practice That Changed My Code Quality I stopped using field injection. ❌ @Autowired on fields ✅ Constructor Injection Why? ✔ Better testability ✔ Immutable dependencies ✔ Cleaner design Small change… big impact. If you’re still using field injection — try this once. What’s your preferred approach? 🤔 #SpringBoot #Java #BestPractices

Spring Boot Bean Lifecycle — Most developers ignore this 🔥 Do you know what happens before your bean is ready? Here’s the flow 👇 1️⃣ Bean Instantiation 2️⃣ Dependency Injection 3️⃣ @PostConstruct runs 4️⃣ Bean is ready to use ✅ And before shutdown: 👉 @PreDestroy is called 💡 Why it matters: ✔ Resource initialization ✔ Cleanup logic ✔ Better control over application lifecycle ⚠️ Mistake: Putting heavy logic inside constructors ❌ 👉 Use @PostConstruct instead Understanding lifecycle = writing smarter Spring Boot apps 🚀 #SpringBoot #Java #BackendDeveloper

Learnt about basic setup of a spring boot project. How we can create a spring boot project, how we can run it, whats each file in the starter project for, whats pom.xml, what are application properties, how to hook up spring boot web starter pack for dependencies using maven central, What a controller is, how can we create a basic controller etc. #BACKEND #JAVA #SPRINGBOOT #SOFTWAREENGINEER

💡 Key benefits of using Spring Boot for REST APIs: ✅ Rapid development with minimal configuration. ✅ Embedded server (Tomcat/Jetty) support. ✅ Powerful annotation-based programming model (@RestController, @RequestMapping). ✅ Easy integration testing and documentation (Swagger/OpenAPI). #SpringBoot #Java #RESTAPI #BackendDevelopment #SoftwareEngineering #Microservices #TechCommunity #Coding #API

🚀 HavocFlow v01.01.00 & v01.02.00 are live on Maven Central! Annotation-driven chaos engineering for Spring Boot — two releases, a lot shipped: ✅ Full test suite · Spring Boot 3.x support · @InjectChaos on interfaces 🛑 @SuppressChaos · 🧬 Scenario inheritance · ⏰ Cron scheduling · 📋 Audit log 🔒 ReDoS fix · ThreadLocalRandom · Pinned Action SHA · Production safety guard Java 8–21 · Spring Boot 2.7+ & 3.x <dependency> <groupId>io.github.havocflow</groupId> <artifactId>chaos-spring-boot-starter</artifactId> <version>01.02.00</version> </dependency> 🔗 https://lnkd.in/gMFMdvRs #SpringBoot #ChaosEngineering #Java #OpenSource