Java 26 — JEP 530: Primitive patterns and switch (Preview) int i = 1000; if ( i instanceof byte b ) { System.out.println( "fits in byte: " + b ); } boolean v = true; switch ( v ) { case true -> System.out.println( "YES" ); case false -> System.out.println( "NO" ); } • Pattern matching now works with primitive types, not only reference types. • The instanceof test can check whether a conversion is exact before binding a variable. • switch also extends to primitive selectors such as boolean, long, float, and double. #java #jdk26 #java26 #jep #jep530 #pathtojava27 #primitive #switch 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 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.

☕ 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

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 8 changed Interfaces forever. Before Java 8, an interface was simple: 👉 Only abstract methods 👉 Only rules, no implementation But Java 8 said… “Let’s upgrade this.” ⚡ What changed in Java 8? Interfaces started doing more than just defining rules. They can now include: ✔ Default Methods → provide implementation inside interface ✔ Static Methods → utility methods within interface ✔ Functional Interfaces → foundation for lambda expressions Why this matters? Earlier problem: 👉 If you add a new method to an interface → All implementing classes break Now with default methods: 👉 You can extend interfaces → Without breaking existing code Real Impact: Cleaner code with lambda expressions Better backward compatibility More flexible and scalable design Interfaces are no longer passive… 👉 They are active design components 📂 Want to see code? Check out my implementation 👇 🔗 https://lnkd.in/gMbX3etx Java 8 vs Java 1.8 👉 Both refer to the same version 👉 “1.8” is internal version naming 👉 “Java 8” is official & widely used #Java #Java8 #Interface #FunctionalInterface #Lambda #Programming #OOP #DeveloperLife #CodingJourney #LearnJava

MBean, which stands for Managed Bean, is a Java object that is exposed through Java Management Extensions (JMX) to monitor and manage a running Java application. It serves as a control panel for your application, allowing you to access critical information and perform management operations. Using MBeans, you can expose various metrics and functionalities, including: - Application health - Memory usage - Thread details - Cache size - Configuration values - Runtime operations such as clearing cache, reloading configuration, and pausing jobs For example, consider an application with a cache. Without MBeans, resolving a cache issue would require restarting the application. However, with MBeans, you can simply open JConsole or VisualVM, check the cache size, and call the clearCache() method to solve the problem without a restart. A simple MBean interface might look like this: public interface CacheManagerMBean { int getCacheSize(); void clearCache(); } In this example, getCacheSize() acts as an attribute, while clearCache() functions as an operation. This MBean can be registered with the MBeanServer, allowing external tools like JConsole, VisualVM, or monitoring platforms to access it at runtime. MBeans are commonly utilized in: - Apache Kafka - Tomcat - ActiveMQ - Spring Boot applications - Application servers - JVM monitoring tools In summary, an MBean is a Java object registered with JMX to facilitate the monitoring and management of a running Java application. I’m also actively strengthening my backend engineering, open-source, and problem-solving skills through GitHub and LeetCode. GitHub: https://lnkd.in/gw6_qdD4 LeetCode: https://lnkd.in/g2CWWq8n #Java #SpringBoot #Microservices #AWS #Kafka #OpenSource #LeetCode #DSA #SoftwareEngineering

🚀 Runnable vs Callable in Java Concurrency — Quick Notes Both Runnable and Callable are Functional Interfaces ✅ 👉 That means you can use Lambda Expressions with them (Java 8+) 🔹 Runnable (Java 1.0) * Functional Interface ✔️ * Method: run() * Return Type: ❌ No return value * Exception Handling: ❌ Cannot throw checked exceptions * Use Case: Fire-and-forget background tasks 🔹 Callable (Java 5.0) * Functional Interface ✔️ * Method: call() * Return Type: ✅ Returns result (Future<V>) * Exception Handling: ✅ Can throw checked exceptions * Use Case: Tasks that need results or error handling 💡 Key Difference * Use Runnable when you don’t care about the result * Use Callable when you need a result or better exception handling ⚡ Lambda Example Runnable r = () -> System.out.println("Running task"); Callable<Integer> c = () -> 10 + 20; 🔥 In modern Java (Java 8+ to Java 21 Virtual Threads), functional style + concurrency = clean & scalable code. #Java #Concurrency #Multithreading #FunctionalProgramming #JavaDeveloper #InterviewPrep

🚀 Java Latest Update – Java 26 is Here! (2026) Excited to share some key highlights from the latest Java release Java 26 (JDK 26) — continuing to push performance, security, and modern development forward. 🔹 HTTP/3 Support Java now supports HTTP/3 in the HttpClient API, enabling faster and more efficient web communication. 🔹 Improved Performance (G1 GC) Enhanced Garbage Collection with reduced synchronization → better throughput and application efficiency. 🔹 Ahead-of-Time (AOT) Object Caching Improves startup time significantly by enabling GC-independent caching.