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foojay is a place for friends of OpenJDK, providing free, reference materials and blogs for daily Java usage.

Learn about new support for XDP to create a simple package blocker for eBPF.

WireQuery is a tool that helps you solve user-reported issues by combining session replay with capturing API calls. In this article, I will …

May 12, 2024 Jansen Ang

Discover how to build a smart home assistant using Langchain4j and Raspberry Pi, featuring capabilities such as question-answering with RAG, …

In this article, we want to share our experience using real-life examples on how to identify and optimize slow SQL queries, especially when …

We'll look at how to write GenAI applications with Java using the Spring AI framework and utilize RAG for improving answers.

Let's make a duplicate finder for documentation together – a tool to quickly detect non-exact, or fuzzy, matches in large text repositories.

With every major cloud provider now offering Arm-based instances, it’s time to start looking at what you need to do to migrate your Java …

JFR logs are easily obtained by simply going into the command line. But what if you don't have access to the command line or terminal …

Let's replace the synchronized keyword to be more virtual threads friendly in a code readable way.

My talk titled "Jakarta EE 11 - Performance and Developer Productivity" will give you a full overview of what to expect from the upcoming …