How to Create a Spring Boot Fraud Scoring Service
Most Java teams who want a machine learning model in production end up standing up a Python service and calling it over HTTP. That works, …
Geertjan Wielenga
92 articles
Toward a Durable Spring PetClinic
What makes a process a good candidate for durability? To answer this, we'll take the canonical Spring PetClinic and interrogate its sources.
Temporal Is to Your Code What a Database Is to Your Data
Your database made your data durable. Temporal does the same for your code.
"This Can't Possibly Work": What I Learned at a Temporal.io Workshop
When developers first hear about Temporal, they tend to move through a predictable sequence of emotions. First comes disbelief — the claim …
Observing Apache NetBeans with OpenTelemetry and Dash0
What happens when you point an observability agent at your IDE rather than your application?
"Agentic" Was Everywhere at Money20/20 Amsterdam
Can an agent initiate a payment, decline a loan, or file a compliance report in a way that's deterministic enough to defend?
From Zero (Really Zero) to OpenTelemetry
Use https://github.com/dash0hq/agent-skills, the free collection of skills for AI coding agents to make applications observable with …
Foojay Podcast #94: More Than a Blog: How Foojay Connects, Sustains, and Evolves the Java Community
Foojay.io, the website for the Friends of OpenJDK, is turning six years old. To celebrate, Frank Delporte headed to JCON in Cologne, …
From Zero to Full Observability with Dash0
This guide walks through the complete process of deploying a minimal Spring Boot service to Kubernetes and adding full observability using …
Announcing: Sustainability for Java Developers
Java developers from around the world are writung a book about a question that's becoming impossible to ignore: how do we write software …
Webinar: "Moving Applications From JDK 21 to JDK 25: What You Need to Know"
JDK 25 has arrived as the latest long-term support (LTS) release for Java, bringing performance improvements and enhanced stability for …
Super Early Bird Tickets: Voxxed Days Amsterdam
The first batch of Super Early Bird tickets will go on sale on October 8, 2026 at 09:30 CET.
Take the State of Java 2025 Survey
Take the State of Java 2025 Survey and learn what's being used where and how in the Java ecosystem.
Ai4Devs Amsterdam: Successful Inaugural Developer-Focused AI Conference
The inaugural AI4Devs conference in Amsterdam, proved to be a resounding success, bringing together approximately 200 developers at …
CodeRabbit Tutorial for Java Developers
For Java developers, CodeRabbit offers specialized analysis that understands Java syntax, best practices, and common patterns.
Foojay Podcast #76: DevBcn Report, Part 1 – Learn from the Community
In early July, the DevBcn conference in Barcelona featured a diverse lineup of speakers, covering topics across multiple technology domains. …
Prime Time: The High Performance Java Event
Java is the engine behind mission-critical applications and end user experiences. From faster response times to consistent performance, Java …
New AI Conference For And By Developers
AI4DEVS, September 19 in Amsterdam, is created for and by developers working with AI technologies.
Azul and JetBrains Collaborate to Enhance Runtime Performance for Kotlin Workloads
This strategic collaboration empowers Kotlin teams to accelerate development cycles and optimize application performance.
Book Review: Raising Young Coders
Whether your child is just beginning to explore technology or ready for more advanced programming, this book provides a solid foundation for …
Foojay Podcast #70: Celebrating 5 Years of Foojay
On April 25, 2020, Geertjan Wielenga published the first Foojay post. Yes, we are celebrating 5 years since the Friends Of OpenJDK website …
Foojay Podcast #69: All Things Java at VoxxedDays Amsterdam
On April 3rd, the first VoxxedDays event in Amsterdam took place. VoxxedDays are tech events organized by local community groups, with …
Join the Celebration of 30 Years of Java
On Thursday, March 13, Azul is hosting a virtual celebration of 30 years of Java, starting at 09:00 PST / 17:00 GMT / 18:00 CET.
Encryption and Data Security Market Analysis: Market Analysis 2025
The data encryption and security market continues to evolve as organizations face increasing demands for data protection while maintaining …
Incident Response Platform Comparison: Market Analysis 2025
The incident response platform market continues to expand as organizations prioritize effective incident management in their cloud-native …
Java Conferences in 2025
Also see javaconferences.org, a subset of which is below. January 15: Voxxed Days CERN, Switzerland 17: Voxxed Days Ticino, Switzerland 23, …
Foojay Podcast #64: Interviews at JFall about opensource, OpenJDK evolutions, Project Loom, JVM,...
Let's wrap up this year with more interviews from the JFall conference. In this episode you'll learn more about Foojay, JVM internals and …
Foojay.io At JFall 2024 (And The Winner Is...)
It was a great day, with a lot of reconnecting to new and existing (not old!) friends, a solid basis for more Foojay.io booths at …
Learn About How Your Peers Use Java!
Do you ever wonder what OpenJDK distributions and what Java versions your peers are using? Java-based infrastructures and languages? How …
Unsupported OpenJDK Distributions are at Risk of Non-Compliance with DORA
Read the only logical conclusion of reading DORA in the context of OpenJDK, assuming that it has meaning and intent in the context of …
Connecting Resilience to Performance in Relation to OpenJDK
Given the requirements of the DORA Act, which mandates strong operational resilience for financial institutions in the EU, leveraging a JVM …
DevIgnition with Foojay.io at Washington DC JUG
This year DevIgnition is proud to partner with Foojay to include a track of talks by the Friends of OpenJDK, in addition to our normal …
The Impact of the EU DORA Act on Non-EU Financial Organizations
DORA is not just a regional EU regulation but one with far-reaching implications for the global financial services market.
Consequences of DORA on Java and OpenJDK with Azul
Azul ensures that financial institutions using Java remain compliant with DORA by providing a secure, supported, and stable Java platform, …
The Impact of the Digital Operational Resilience Act (DORA) on Java Investment with Azul
DORA significantly impacts investments by the financial sector in Java, because of its emphasis on secure and resilient software.
Foojay Podcast #49: JCON Report, Part 1 - JUGs, Communities, Generative AI, and more!
On Tuesday, May 14th, the Foojay Podcast went live at the JCON conference in Cologne, Germany, to talk with speakers and visitors about all …
Oracle Alternatives Survey & Report
Azul is planning to issue an Oracle "alternatives" Report in late July, and would like your help to complete the survey.
Foojay.io Mini Conference at Uber, Amsterdam
Uber Tech is partnering with Java User Group Amsterdam to host their first mini conference with Foojay.io.
Friends of OpenJDK Hangout at FOSDEM 2024
Spend time with OpenJDK enthusiasts in Bier Central in Brussels on Saturday, 3 February from 18.30.
Digma, Apache APISIX, and OpenValue: Foojay.io at JFall 2023
Last week at JFall 2023, was a high point in the evolution of Foojay.io, the place for friends of OpenJDK.
Book Review: "Java Basics", by Shai Almog
Shai Almog's "Java Basics" more than lives up to its title. And how could it be otherwise, with its highly Java driven and opinionated …
Book Announcement: "OpenJDK Migration Guide for Dummies"
Learn how to migrate to OpenJDK and get tips on how to select the right Java partner to assist with your migration and provide suppoer.
Foojay Status Report: July 2023
Great big overview of Foojay.io, plus its subprojects and related insights and statistics, as well as upcoming plans.
State of Java Survey
Do you ever wonder what OpenJDK distributions and what Java versions your peers are using? What Java versions?
FinOps: Tim O'Brien at Walmart
"Java and the Java community are what brought me to this role, but my focus is now on Cloud cost, budget, and ideas for efficiency."
FinOps: John Stuart at Azul
"Wouldn’t it be great to use a Java Virtual Machine (JVM) to be 30% more performant? That is a win for both Engineering and Finance."
Foojay.io at FOSDEM 2023 Trip Report
"What if Simon Ritter's keynote at FOSDEM entitled 'After Nearly 30 Years, How Is Java So Popular?' ends up being held... in an empty room?"
More Foojay.io FOSDEM Speaker Predictions for 2023
Following from the first part in this series, here is the next, from speakers who will be in the Foojay room at FOSDEM, Sunday, 5 February.
Foojay Podcast #12: State and Future of the IDEs
In this podcast, we are talking to some of the key people working on different IDEs, Integrated Development Environments.
Foojay.io FOSDEM Speaker Predictions for 2023
FOSDEM is around the corner and a group of great speakers is lined up to talk about the OpenJDK -- see what they predict for 2023!
Friends of OpenJDK Schedule at FOSDEM 2023
On from good times in 2022 and 2021, we have a really great schedule with inspiring speakers for FOSDEM in Brussels, on Sunday, February 5!
Friends of OpenJDK at FOSDEM 2023
The upcoming FOSDEM 2023, 5 February 2023, will be live and everything will be in person, submit to the "Friends of OpenJDK devroom"!
Foojay Podcast #6: Welcome to Foojay!
Let's look back and what has happened on Foojay during the last 2,5 years and talk to some of the people behind the project.
OpenJDK 19 Released!
The friends of OpenJDK community has put together a number of resources, and more coming in the coming weeks!
join.slack.com/t/foojay/signup
Join Foojay.io on Slack, here: join.slack.com/t/foojay/signup
Released: OpenJDK 18.0.2, 17.0.4, 15.0.8, 13.0.12, 11.0.16, 8u342
The next quarterly release of the OpenJDK has been made available, as scheduled, for July 2022, impacting a number of OpenJDK releases.
Foojay Status Report: January – June 2022
The latest analysis and statistics show that Foojay had as much traffic over the past half year as over the whole of 2021.
How To Submit Your Next Article On Foojay.io
The complete guide to publishing your article on Foojay.io: prepare a content folder from the template, add your images, and submit it by …
"Contrast Security Joins Foojay Advisory Board to Accelerate Java Developer Community Growth, Raise Security Perspective" — PR News
"We're honored to join the Foojay Advisory Board because we know Java developers rely on the Foojay community and the foundation's mission …
Foojay at FOSDEM 2022 on YouTube And Prize Winners
Last weekend, FOSDEM 2022 was held, with the friends of OpenJDK putting together an awesome program on the tools and editors around OpenJDK.
Video: SDKMAN Explained
One of the highlights of the Friends of OpenJDK room at FOSDEM 2021 was Marco Vermeulen, the creator of SDKMAN, talking about SDKMAN.
Friends of OpenJDK at FOSDEM with Prizes
A great line up of known and less known OpenJDK users from the Foojay community will be at FOSDEM, with a quiz and awesome prizes to be won.
Foojay Status Report: July – December 2021
Foojay doubled in usage from the first half to the second half of the year. - by Geertjan Wielenga
Friends of OpenJDK at FOSDEM 2022
The upcoming FOSDEM, 5 and 6 February 2022, will be virtual and everything will be prerecorded, submit to the "Friends of OpenJDK devroom"!
Book Review: "Effortless Cloud-Native App Development Using Skaffold"
Quickly and thoroughly learn how to simplify the development and deployment of Cloud-native SpringBoot applications on Kubernetes.
JReleaser: Looking for Translation Contributions
Looking for people who would like to contribute translations allowing JReleaser to reach and help an even wider audience!
Book Review: "Help Your Boss Help You"
Here's a book to be read thoroughly several times and then to be placed behind glass to be broken in case of emergency!
Schedule for Foojay Virtual OpenJDK 17+ JUG Tour
To celebrate the OpenJDK 17 & Foojay.io as a vendor-neutral community platform for its users, we’re kicking off the Virtual Foojay JUG Tour!
Announcement: Virtual Foojay OpenJDK 17+ JUG Tour
During September and October, contributors to Foojay will make a whistle stop tour through as many JUGs as possible, via virtual meetups!
Foojay Status Report: January - June 2021
Half year mark of 2021 is a good moment to reflect on the current status of Foojay.io, a place for friends of OpenJDK!
Participate in the Java Ecosystem Survey 2021
Just like last year, and together with our partner Azul, we would like your input on how you use Java and the JVM ecosystem.
Highlights of the Newest and Latest JEPs in Java 16
The JDK Enhancement Proposal (or JEP) is a community process for proposals for enhancements to the OpenJDK. Which ones made it into Java 16?
Download OpenJDK Today!
Multiple different vendors provide the OpenJDK and Foojay.io gives you access to them all.
Foojay Announces Initial Companies Making Up Its Advisory Board
Azul, Datadog, DataStax, JFrog, Payara, and Snyk are the initial companies that will be a part of the advisory board.
Virtual Tour Is Biggest Project Yet For Java Community Platform Foojay
Fifteen events are already confirmed in an ambitious virtual tour of JUGS across the globe, a strong start for Java community platform …
Here's The Schedule for Foojay Virtual JUG Tour!
To celebrate the OpenJDK and Foojay.io, we’re kicking off the Virtual Foojay JUG Tour to be held throughout March and April.
"Foojay: A Place for Friends of OpenJDK" - ADT Magazine
Foojay.io, the community site for developers who use, target, and run their applications on top of Java and OpenJDK, today announced the …
Azul, Datadog, DataStax, JFrog, Payara, Snyk on Foojay Advisory Board
Foojay.io today named the companies who will make up its advisory board—Azul, Datadog, DataStax, JFrog, Payara, and Snyk.
Announcing the Upcoming Virtual Foojay JUG Tour!
To celebrate the OpenJDK and Foojay.io as a community platform for its users, we’re kicking off the Virtual Foojay JUG Tour.
Preview of January 2021 OpenJDK Update Release
Vote for the items that you find most useful and we'll build a community-based perspective of the January 2021 OpenJDK Update release.
Friends of OpenJDK Schedule at FOSDEM 2021
Subject to change, here's the schedule for FOSDEM 2021, a virtual event this year on 6 and 7 February, for the Friends of OpenJDK devroom!
What Are Your Java Predictions, Hopes, and Dreams For 2021?
Wrapping up a series with a list of brief predictions from a wide variety of leading members of the Java community!
Join Friends of OpenJDK at FOSDEM 2021
Organizations included in setting up the Foojay dev room, all active on Foojay.io in one way or another, are Azul, JFrog, Payara, and Snyk.
Apple Silicon with Zulu OpenJDK and IntelliJ IDEA
Azul has made Zulu OpenJDK builds of OpenJDK 8, 11, and 13, as well as 16-ea, available on Apple Silicon, Arm-based Macs. Check it out!
"Foojay - All About Java and the OpenJDK" -- I Programmer
Tracking the OpenJDK is not an easy feat. It evolves rapidly under a release cycle of a new version every 6 months. Foojay helps out!
What's New, Noteworthy, and Enhanced in Java 15?
Here on foojay, the fixes that went into the release are listed, giving you a unique and readable changelog in helpful categories.
Facelift and Redesign for Foojay Homepage | foojat
foojay.io has had a bit of a facelift over the past week. Now you can see directly on the homepage all the key pieces that make up foojay.
Interview: Frank Delporte, Foojay Raspberry Pi Community Manager
Today we introduce a community manager for all things Raspberry Pi on foojay, Frank Delporte. He'd love to publish your Java/Raspberry Pi …
Interview: Chris Newland & Java Command Line Switches
We're happy to announce that we’re hosting Chris Newland’s VMOptionsExplorer on foojay, providing all details per release on Java command …
Interview: Marc Hoffmann and Java Version Almanac
The Java Version Almanac provides details per release on OpenJDK distributions, new features, and differences between APIs across releases.
OpenJDK Update Release Details Dashboard
Foojay is a one stop solution for everything related to Java. The Dashboard offers analysis, highlights, and categorized lists of updates by …
foojay: A Place for Friends of OpenJDK
For Java developers who depend on OpenJDK, foojay is the place to be for comprehensive dashboards, insights, analysis, and blogs. Read More!