Sealed classes in Java are a new feature that provides a way to restrict the classes that can inherit from a superclass or extend an interface. This new language feature enhances the encapsulation and provides more control to developers over their codebase. In this tutorial, we will explore sealed classes, how to use them to find all subclasses, and how …

We have all likely worked on a project, that has grown quite “mature” over time, who knows we might even have forgotten to keep our dependencies up to date? Mayhap we finally got the green light to move from JDK 8 to 17? This will quite likely entail a lot of library updates, and maybe some interesting changes (cough javax …

This is part 2 of a two part series on Starting Apache Kafka Server, Configuring Kafka Topic, and Creating a Core Java Based Kafka Consumer, as also a Core Java Based Kafka Producer. All this is demonstrated in step-by-step examples. All of this is for Java v8.0, Apache Kafka v3.4 on Windows 10. Part 1 focused on Kafka Consumer and …

The subject of Java licensing and OpenJDK migration is complex and vital to many software engineers. I am no different. It’s a topic that’s often shrouded in legal jargon and technicalities, making it difficult to approach. “OpenJDK Migration for Dummies” by Simon Ritter offers a fresh perspective, breaking down these challenges into digestible segments. It directly speaks to my core …

To make it as easy as possible to get started with Java on the Raspberry Pi to interact with electronic components, I started a new section on the Pi4J website with JBang examples. In this tutorial, I want to show you how you can read the temperature, humidity, and pressure from a BME280 Sensor. What Is Used? As explained on …

As we inch closer to the release of JDK 21 in September (next month!), it’s crucial to familiarize ourselves with the transformative features and improvements this version is poised to bring to the Java ecosystem. Let’s embark on a comprehensive tour of the noteworthy changes and enhancements in JDK 21. Revising the Balance of Serviceability and Performance with JEP 451 …

A Java thread in the JVM regularly checks whether it should do extra work besides the execution of the bytecode. This work is done during so-called safepoints. There are two types of safepoints: local and global. At thread-local safepoints, also known as thread-local handshakes, only the current thread does some work and is therefore blocked from executing the application. At …

Disclaimer: this post includes affiliate links; I may receive compensation if you purchase the book from the different links provided in this post. This review is about Designing APIs with Swagger and OpenAPI by Joshua S. Ponelat and Lukas L. Rosenstock from Manning. I’m continuing my API journey by reading books, viewing relevant YouTube videos, and reading relevant IETF RFCs. …

For the fourth time in four years, Oracle has changed how it prices and licenses Java. Many organizations that rely on Java are switching from the Oracle JDK to OpenJDK and taking advantage of significant cost savings in the process. But if you have a variety of specialized Java applications, created at different times and running on different JDK versions, …

Hi everyone, welcome to our July update for Visual Studio Code for Java! In this article, we are going to provide you an exciting update about our improved decompiler functionality. Additionally, we are going to do a deep-dive into our code completion. Let’s get started! Decompiler Support Upgrade Java decompiler is essential for understanding third-party libraries, debugging, and learning from …