Nandan Krishna K’s Post

One thing I like about Java is that the biggest progress is often not dramatic enough for social media. There is no single “magic” feature between Java 21 and 25 that changes everything overnight. What you get instead is something more valuable: a better platform. Between Java 21 and 25, Java added: ✅ Scoped Values, ✅ Structured Concurrency, ✅ Foreign Function & Memory API, ✅ Stream Gatherers, ✅ Class-File API, ✅ Compact Object Headers, ✅ Generational Shenandoah, ✅ more startup and profiling work, ✅ better JFR, ✅ and... cleaner syntax with unnamed variables and patterns, module import declarations, and more flexible constructor bodies. That is why I liked Frank Delporte’s video on the move from Java 21 to 25. It looks at Java the way real teams should look at it: not as isolated release notes, but as accumulated engineering progress between LTS versions. Too many people ignore the non-LTS releases and then act surprised when the next LTS contains a lot of change. Worth watching if you want a practical summary without drowning in JEP numbers. ➡️ https://lnkd.in/dnqmDUnj Are you on Java 25 yet?

Thanks, Daniel Witkowski, for sharing this episode of the Friends of OpenJDK (Foojay.io) podcast about the changes between Java 21 and 25. And to Jakob Jenkov, Jonathan Vila López, Ryan Svihla, Mary Grygleski, 👓 Anton Arhipov, Ronald Dehuysser, and Jonathan Ellis, who took the time to share their point of view!

Java keeps evolving: understanding the difference between versions Java is no longer just “Java 8”! Each new version brings features that simplify code, improve performance, and enhance security. Here’s a quick overview: 🔹 Java 8 (2014) Introduced lambdas and the Stream API → more concise and functional code. Optional to handle null values safely. New date and time API (java.time). 🔹 Java 9 Module system (Jigsaw) for modular applications. Improved collection APIs. JShell: a REPL for quick code testing. 🔹 Java 11 (LTS – 2018) Long-term support version. Convenient String methods (isBlank, lines, repeat). Standardized HTTP Client. Removal of deprecated modules and features. 🔹 Java 17 (LTS – 2021) Pattern matching for instanceof. Sealed classes to control inheritance. Stream and Collection API improvements. 🔹 Java 21 (2023) Improved Records and Pattern Matching. Virtual Threads (Project Loom) → better concurrency and performance. Overall performance improvements and modern APIs for current development needs. Why keep up with Java versions? Enhanced security Optimized performance Modern syntax and less boilerplate As a full-stack developer, staying updated with Java versions allows you to build applications that are faster, cleaner, and more secure. Which Java version are you using in your projects today? #Java #Development #LTS #FullStack #CodingTips #Innovation

Still on Java 8? You're missing out. Java has evolved significantly. It's time to unlock its modern power. The rapid six-month release cadence means Java is innovating faster than ever. Modern versions aren't just about significant performance gains; they introduce powerful language features that streamline development, improve code readability, and address common boilerplate. Adopting these new features future-proofs your applications and significantly enhances developer experience. Here's why you should upgrade: - Records simplify data transfer objects, reducing boilerplate significantly. - Pattern Matching for instanceof and switch statements makes code cleaner. - Text Blocks dramatically improve readability for multi-line strings like SQL or JSON. - Virtual Threads

A Java concept that confused me at first: Why were default methods introduced in interfaces? Before Java 8, interfaces could only have: • method declarations (no implementation) Which meant: If you added a new method to an interface, every class implementing it would break. Example: interface PaymentService {   void pay(); } Now if you add: void refund(); All existing classes must implement refund() ❌ This becomes a problem in large systems. 👉 Solution: Default Methods (Java 8) Default methods allow interfaces to provide a default implementation. Example: interface PaymentService {   void pay();   default void refund() {     System.out.println("Default refund logic");   } } Now: • Old classes don’t break ✅ • New behavior can be added safely ✅ 👉 Internal idea (simple) A default method is just a method inside an interface with a body that implementing classes can use or override. 👉 Why this matters It allows Java to evolve without breaking existing code. A simple example is forEach(). It was added later to the Iterable interface, but all existing collection classes could use it without any changes. That’s how default methods help Java grow without breaking old code. Small design decisions like this make a big difference in real systems. Had you faced issues while modifying interfaces in your projects? #Java #BackendEngineering #Java8 #SoftwareEngineering #LearningInPublic

☕ Java 26 — JEP 517: HTTP/3 for the HTTP Client API var client = HttpClient.newBuilder() .version( HttpClient.Version.HTTP_3 ) .build(); var request = HttpRequest.newBuilder( URI.create( "https://vvauban.com/" ) ) .version( HttpClient.Version.HTTP_3 ) .GET() .build(); var response = client.send( request, HttpResponse.BodyHandlers.ofString() ); • Java’s standard HttpClient can now opt into HTTP/3. • That gives developers access to QUIC-based transport without changing libraries. • If the peer does not support HTTP/3, the client can fall back to older HTTP versions. #java #java26 #jdk26 #pathtojava27 #jep517 Go further with Java certification: Java👇 https://bit.ly/javaOCP Spring👇 https://bit.ly/2v7222 SpringBook👇 https://bit.ly/springtify JavaBook👇 https://bit.ly/jroadmap

🚀 Java has come a LONG way. From writing anonymous classes in Java 7 to spinning up millions of Virtual Threads in Java 21 — the evolution is staggering. Here's a quick timeline of what changed everything 👇 ☕ Java 8 (2014) — The revolution begins → Lambda expressions, Streams API, Functional interfaces → Java finally felt modern 📦 Java 9 (2017) — Modularity arrives → JPMS module system, JShell REPL → Large apps became more maintainable 🔤 Java 10 (2018) — Less boilerplate → var keyword — type inference is here → Shorter, cleaner code 🌐 Java 11 LTS (2018) — Production-ready upgrade → HTTP Client API, String improvements → Most teams still run this today 🔀 Java 14 (2020) — Expressions get powerful → Switch expressions, Records (preview) → Pattern matching begins 🔒 Java 17 LTS (2021) — Safety + elegance → Sealed classes, full Pattern matching → The most stable LTS after Java 11 ⚡ Java 21 LTS (2023) — Game changer → Virtual Threads (Project Loom) → Millions of concurrent threads, zero headaches → Record patterns, Structured Concurrency → This is the LTS to upgrade to RIGHT NOW 🔮 Java 22–26 (2024–2025) — The future → String Templates, Scoped Values → Value Objects, Performance improvements → Java keeps getting better every 6 months Which Java version is your team running in production? Drop it in the comments 👇 #Java #SpringBoot #SoftwareEngineering #BackendDevelopment #JavaDeveloper #TechCareers #CleanCode #Microservices #ProjectLoom #100DaysOfCode

Migrating from Java 8 to Java 17? Save your time. 🕰️🚀 Many of us are still stuck with legacy Java 8 or 11 projects. But Java 17 and 21 offer features that can significantly simplify our work. But where is the time to relearn everything? That's where a prompt writer can help you. ✅ Expert Prompt: Act as a senior Java developer. I need to migrate this legacy Java 8 code snippet to Java 17. The code has extensive boilerplate and nested if-else blocks. Provide an example where: 1. Code is simplified using switch expressions and pattern matching. 2. Data objects are created using Java 16 'Records.' 3. The latest features of the Stream API are applied. 4. The logic and functionality of the code remain unchanged. Explain the rationale behind each update." This gives you a solid foundation that you can refine with your expertise. I specialize in crafting advanced prompts for complex development workflows. Want to upgrade your team's tech skills? DM me. #JavaDevelopment #JavaMigration #Java17 #SoftwareEngineering #CodeUpgrade #AI_in_Action #DeveloperEfficiency #BackendDevelopment

Java 17 vs Java 21 — what really changed? Java 17 gave us a solid and stable LTS foundation, with features like records, sealed classes, and improved pattern matching. It became the go-to choice for production systems. Java 21 takes things further with a strong focus on scalability and modern development. The highlight? Virtual Threads, enabling massive concurrency with simpler code. We also get improvements in pattern matching, new APIs (like Sequenced Collections), and better performance with enhancements in the JVM and garbage collectors. In short: Java 17 is stability. Java 21 is evolution. If you're building modern, high-scale systems, Java 21 is a big step forward

Virtual Threads are probably the most significant change in JVM since the traditional concurrency model. In I/O-bound scenarios, they allow you to scale while maintaining simple and predictable code, something that historically required reactive or lots of engineering around pools. Still, the actual impact depends on how "thread-friendly" the remaining stack is.