I tweet technical content that I consider interesting, but the funny tweets are the ones that get the most engagement. I attended the JavaLand conference in March, stumbled upon the Gradle booth, and found this gem: Of course, at some point, a fanboy hijacked the thread and claimed the so-called superiority of Gradle. In this post, I’d like to shed …

The phrase “it works on my machine” can be a source of amusement, but it also represents a prevailing attitude in the world of development – an attitude that often forces users to prove bugs before we’re willing to investigate them. But in reality, we need to take responsibility and chase the issue, regardless of where it takes us. A …

Yes, the Raspberry Pi Operating System is awesome! But the Pi4J project made it even more awesome by adding “goodies” for Java developers! Pi4J OS is not yet another OS, but the official Raspberry Pi OS, with additional tools and preconfigurations to make it the ideal OS for any Java and JavaFX developer who wants to use a Raspberry Pi. …

AsyncGetCallTrace is an API to obtain the top n Java frames of a thread asynchronously in a signal handler. This API is widely used but has its problems, see JEP 435 and my various articles on Foojay.io. My original approach with my JEP proposal was to build a replacement of the API, which could be used as a drop-in for …

In this tutorial, we will take a look at working with GitLab Merge Requests inside IntelliJ IDEA. When reviewing Merge Requests in a web interface, we don’t have the same support that our IDE gives us, like syntax highlighting and the context within which the code was written. IntelliJ IDEA has support for reviewing and merging GitLab Merge Requests. These …

An easy non-obtrusive way to collect data about your dockerized app without changing your existing docker-compose.yml or docker files! This is just a neat trick that I discovered when I was trying to collect OTEL data about my application which was running via Docker Compose. I was trying to understand more about the code using tracing. However, I definitely didn’t want to modify …

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 …