Java Evolution: Java 8 to 25 Updates

Java 21 virtual threads = 100x better memory efficiency. 10,000 concurrent users: - Java 17: 2GB memory - Java 21: 200MB memory Should you upgrade? Depends. https://lnkd.in/eNti373x

Day 4 of revising Java fundamentals. Today I focused on understanding threads and how Java handles concurrent execution. Topics revised: • What is a Thread • Thread lifecycle • Creating threads (extends Thread / implements Runnable) • start() vs run() • Basic multithreading concepts Understanding threads helped me see how programs can run multiple tasks simultaneously and improve performance. Still learning step by step. #Java #Multithreading #CodingJourney #SoftwareDevelopment #LearningInPublic

🚀 Java Evolution: Java 8 → Java 25 (Latest LTS) Here’s a crisp comparison 👇 🔥 Big Shift Over Time Java 8 → Functional programming begins Java 17 → Clean, expressive code (Records, Sealed) Java 21 → Concurrency revolution (Virtual Threads) Java 25 → 🧠 Performance + simplicity + production-ready modern Java #Java #Backend #SoftwareEngineering #SystemDesign #Programming #Developers #TechEvolution

Java Evolution: From Lambdas to Virtual Threads 🔶 Java 8 (March 2014) – LTSIntroduced Lambda Expressions Added Stream API Launched Optional Class Enabled Default Methods New Date & Time API Support for Functional Interfaces 🔶 Java 11 (September 2018) – LTS New HTTP Client API Local Variable Syntax in Lambdas Enhanced String Methods Single-File Program Execution Nest-Based Access Control Built-in Flight Recorder 🔶 Java 15 (September 2020) Introduced Text Blocks Sealed Classes (Preview) Records (2nd Preview) Hidden Classes ZGC Production Ready EdDSA Cryptography 🔶 Java 17 (September 2021) – LTS Finalized Sealed Classes Introduced Pattern Matching Records (Official Release) Stronger Encapsulation Foreign Function API macOS Support on ARM 🔶 Java 21 (September 2023) – LTS Introduced Virtual Threads Record Patterns Pattern Matching for Switch Sequenced Collections String Templates Scoped Values 🔶 Java 25 (September 2025) – LTS Project Valhalla Enhancements Introduction of Value Classes Primitive Type Patterns Enhanced Foreign Function & Memory API Structured Concurrency Project Leyden #Java #JavaDeveloper #JavaEvolution #BackendDevelopment #Programming #SoftwareEngineering #Microservices #JVM #Coding #Developers #TechTrends #JavaLTS #VirtualThreads #SystemDesign #SpringBoot

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 Native Interface(JNI) Performance in Spring Boot The Java Virtual Machine (JVM) allows developers to write code once and run it anywhere, but in performance-intensive scenarios, Java can become a bottleneck. This article explains how the Java Native Interface (JNI) enables Java applications to integrate with high-performance C++ code, and demonstrates a practical Spring Boot project that processes 4K video at 60fps using native code. Read here: https://lnkd.in/dCaCRk2H #Java #JNI #SpringBoot #Performance #NativeCode #CPlusPlus #SoftwareDevelopment #Programming

Day 10 / 60 — Understanding Multithreading in Java Continuing my journey to become a Java Spring Boot Developer. Today I explored multithreading in Java — a key concept for building efficient and high-performance applications. Covered: • Thread class and Runnable interface • Thread lifecycle and states • Creating and managing threads • Basic synchronization concepts Key takeaway: Multithreading allows applications to perform multiple tasks simultaneously, but it also requires careful handling to avoid issues like race conditions and ensure thread safety. Moving closer to completing Core Java and diving deeper into backend development. #Java #SpringBoot #BackendDevelopment #Multithreading #LearningInPublic

Java Text Blocks, a feature introduced in Java 15, help resolve Sonar issues. However, most developers are not using this feature. It should be adopted and used regularly. https://lnkd.in/gdg2RfeJ

Java 8 Lambda Expressions — Write Less, Do More Before Java 8, writing even simple logic often meant verbose boilerplate code. Anonymous classes made things harder to read and maintain. Then came Lambda Expressions — a game changer for Java developers.