Geertjan Wielenga84 articles

Latest post Announcing: Sustainability for Java Developers — A New Collaborative Guide from the Foojay.io Community

Java developers from around the world are writing a book about a question that’s becoming impossible to ignore: how do we write software that’s good for both our projects and the planet? Sustainability for Java Developers: Towards an Understanding of …

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February 02, 2026
  • Webinar: “Moving Applications From JDK 21 to JDK 25: What You Need to Know”

    Table of Contents Why Upgrade?Upcoming Webinar: Your Migration Guide JDK 25 has arrived as the latest long-term support (LTS) release for Java, bringing performance improvements and enhanced stability for modern applications. If your organization is running JDK 21, now is …

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    • Geertjan Wielenga
    January 26, 2026
  • Super Early Bird Tickets: Voxxed Days Amsterdam

    Table of Contents Speaker Line-upTickets & Participation After this year’s success, the Voxxed Amsterdam team is proud to announce that next year will be even bigger, with more speakers, breakouts, sponsors, and attendees. We warmly invite you to join and meet us …

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    October 06, 2025
  • Take the State of Java 2025 Survey

    Do you want to know which Java JDK distribution is used where for what and when? The time has come again to take the State of Java Survey and share insights while gaining Java ecosystem knowledge. All those participating will …

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    • Geertjan Wielenga
    October 06, 2025
  • Ai4Devs Amsterdam: Successful Inaugural Developer-Focused AI Conference

    Table of Contents 50% Live Coding The inaugural AI4Devs conference in Amsterdam, held recently Friday 19 September, a collaboration between Java Champion Jonathan Vila, local developer agency IO Digital (in particular Joost Kaan, Arno Koehler, and Michel Blankenstein), and the Friends of OpenJDK …

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    • Geertjan Wielenga
    October 03, 2025
  • CodeRabbit Tutorial for Java Developers

    Table of Contents Getting StartedPrerequisitesSetup ProcessCore Features for Java Development1. Code Quality Analysis2. Security Vulnerability Detection3. Performance Optimization Suggestions4. Design Pattern RecognitionWorking with CodeRabbit ReviewsUnderstanding Review CommentsResponding to ReviewsJava-Specific ConfigurationCustom Rules SetupMaven/Gradle IntegrationAdvanced Features1. Custom Prompts2. Architectural Reviews3. Testing SuggestionsBest …

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    July 28, 2025
  • Foojay Podcast #76: DevBcn Report, Part 1 – Learn from the Community

    Table of Contents VideoPodcast AppsContent In early July, the DevBcn conference in Barcelona featured a diverse lineup of speakers, covering topics across multiple technology domains. Geertjan Wielenga took the camera and microphone with him to Spain. Together with Nacho Cougil …

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    July 21, 2025
  • 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 can have a significant impact on business results and cloud costs. Join Azul and leading voices from the Java community for …

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    • Geertjan Wielenga
    July 08, 2025
  • New AI Conference For And By Developers

    AI4DEVS, September 19, 2025 in Amsterdam, is created for and by developers working with AI technologies. Our mission is simple: share practical, usable knowledge with real use cases and code. Whether you’re an experienced AI engineer or just starting to explore …

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    July 07, 2025
  • Azul and JetBrains Collaborate to Enhance Runtime Performance for Kotlin Workloads

    SUNNYVALE, Calif., — May 20, 2025 — Azul, the only company 100% focused on Java, and JetBrains, the leading provider of professional software development tools and creator of the Kotlin programming language, today announced a strategic technical collaboration to enhance the runtime performance …

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    • Geertjan Wielenga
    May 26, 2025
  • Book Review: Raising Young Coders

    “Raising Young Coders” by Cassandra Chin: A Parent’s Guide to Inspiring the Next Generation of Technologists An Author Who Understands Both Sides “Raising Young Coders: A Parent’s Guide to Teaching Programming at Home” by Cassandra Chin is an invaluable resource …

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    • Geertjan Wielenga
    May 07, 2025
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