Foojay.io | Friends of OpenJDK and Java Programming

Runtime reflection is a quiet tax on the JVM. It is flexible, it is everywhere, and it is easy to stop noticing it until you go looking for where your CPU is actually going. Two teams did exactly that, in completely different corners of the ecosystem, and arrived at the same answer: move the work to build time. In this episode, Dmitry Moskalyuk explains the model layer behind his Foojay article on reflection-free serialization, where JSON, XML, YAML and TOML all end up as Avro. Shai Almog explains the build-time codegen pipeline of Codename One, which aims for no reflection, no service loader and no Class.forName. We compare the two and ask whether generated code is really something to avoid. Topics include: Where Jackson's reflection cost really lives, and what Blackbird does about it Jackson versus kotlinx.serialization, and why a missing feature sent the team back to Jackson Why a UI framework bans reflection, and how that differs from the backend Is generated code bad? Lombok, Manifold and jOOQ What…

Foojay.io quietly moved off WordPress and onto Hugo. No more CMS login, no database, no admin panel — just Markdown and AsciiDoc files, built and deployed straight from GitHub. So is a traditional CMS still the right way to run a content site in 2026, or has static tooling caught up? In this episode, Andy Damevin and Holly Cummins from the Red Hat Quarkus team join to talk through it. Andy created code.quarkus.io and Roq, Quarkus's own Java-based static site framework; Holly led the migration of quarkus.io itself from Jekyll to Roq. We go through the real security numbers behind WordPress's plugin ecosystem, and put very different static site generators head to head: Hugo and Jekyll, the veterans, versus Roq, the newcomer. Topics include: Why WordPress core is usually fine, and the plugins are where the trouble is — over 10,000 plugin vulnerabilities found since 2025 What "recovery" means for a static site versus a CMS after a hack or defacement Jekyll, Hugo, Roq and JBake compared, and why staying in Java…

Episode 101 of the Foojay Podcast. JDK 27 arrives on 15 September 2026 without finalising a single new piece of language syntax. It is still worth the upgrade: object headers shrink from 64 bits to 32, which the JEP measures at 22% less heap and 8% less CPU on SPECjbb2015, and G1 becomes the default garbage collector on every machine. Both changes live inside the JVM, so an application you compiled years ago picks them up with no code change at all. Simon Ritter, Deputy CTO at Azul and Java Champion, takes us through all nine JEPs in the release, explains why a non-LTS version is still worth testing against, and makes the point that "long-term support" describes the binary you download rather than anything in OpenJDK itself. We also cover the move from quarterly to monthly security updates that started in August 2026, and then look ahead to March 2027, when Project Valhalla reaches its first preview after roughly twelve years of work. Topics include: Compact object headers by default, and what 22% less heap…

Episode 100 of the Foojay Podcast. No grand plan. It just happened. To mark the milestone, Frank turned the microphone around and invited other podcasters: Adam Bien (airhacks.fm), Jennifer Reif (Breaktime Tech Talks), Kadi McKean and Steve Pool (10xInsights), and Oumaima Zerouali (JCast). Same questions for each: why did you start, what broke, and what did you learn? Along the way: why a no-prep podcast works when you have 20 years of experience, the difference between writing a blog and recording a podcast, burnout from editing, AI tools that changed someone's voice into Batman, and why a Dutch Java podcast about the human side of development got its first episode from a calendar invite that became a recording. Guests: Adam Bien — airhacks.fm Jennifer Reif — Breaktime Tech Talks Kadi McKean and Steve Pool — 10xInsights Oumaima Zerouali — JCast Links: airhacks.fm on Spotify Breaktime Tech Talks on Spotify 10xInsights | 10xInsights on Spotify JCast Foojay Podcast #67: Writing a book. Does it make you rich…

Your Java AI application is live in production. But have you tested whether it can be jailbroken, manipulated into revealing its system prompt, or tricked into printing content it should never output? In this episode, Iryna Dohndorf, Software Engineer at Karakun Group and creator of Tiberius, explains how to bring security testing to LLM-powered Java applications. We cover why traditional unit tests break down with non-deterministic systems, how the Scan-Fixture-Validate workflow works, what buff mutation testing is, and why even well-trained models can be cracked with something as simple as the grandmother attack. Topics include: Why LLM non-determinism breaks the classic input/output test model The Scan-Fixture-Validate principle and sharing test artifacts across teams Prompt injection, jailbreaks, and emotional manipulation attacks Buff mutation: testing linguistic surface coverage Probabilistic security contracts and multi-trial scans Fingerprinting and why your model choice should not be detectable LLM…

WebAssembly is already running inside Java applications, but most developers just don't know it yet. In this episode, Andrea Peruffo walks us through how WebAssembly is becoming the modern, safe alternative to JNI. Run Rust, C, and other native libraries directly on the JVM, without the crash risks, per-platform packaging headaches, or the observability blackhole that JNI creates. From JRuby's Prism parser to SQLite and full Postgres running as pure Java bytecode, the use cases are real. And the project making it possible, Endive, under the Bytecode Alliance, is open and ready to explore. Guest Andrea Peruffo GitHub: https://github.com/andreaTP/ LinkedIn: https://www.linkedin.com/in/andrea-peruffo-32269178/ Bluesky: https://bsky.app/profile/andreatp.bsky.social Links A New Generation of Java Libraries: Wasm Becomes the Implementation Detail Chicory on GitHub Endive on GitHub Endive documentation Bytecode Alliance OpenJDK Project Detroit Timestamps 00:00 Introduction of topic and guests 00:56 What is…

BoxLang is a modern dynamic JVM language built for rapid application development. It's 100% Java-interoperable, compiles to JVM bytecode, and deployable anywhere from OS to AWS Lambda to Spring Boot. In this episode, we sit down with Luis Majano (CEO of Ortus Solutions and creator of BoxLang) and Cristobal Escobar (BoxLang community manager) to dig into the wave of innovation that has hit the platform over the past few months. We cover the BoxLang AI v3 release, a major overhaul that ships multi-agent orchestration with parent-child hierarchies, an AI Skills system based on Anthropic's open standard, MCP server integration (both consuming and serving), a composable middleware layer with six built-in classes including a FlightRecorder for deterministic CI testing, and a unified API spanning 17 AI providers. Luis and Cristobal walk us through the highlights of a 7-part BoxLang AI deep dive series, covering tools, memory systems & RAG, streaming, middleware, and MCP. We also touch on the BoxLang Spring Boot…

What if you could run 35 AWS services locally in under 25 milliseconds, using just 13 megabytes of memory, with a single Docker command and no cloud bill? That's exactly what Floci does. In this episode, Frank Delporte talks with Hector Ventura, the creator of Floci, a free and open-source cloud emulator built with Quarkus and GraalVM native compilation. Hector walks us through why he built it when LocalStack dropped its open-source community edition, how AI tooling helped him accelerate development of new service integrations, the challenges of keeping GraalVM happy with third-party libraries, and the road ahead for Azure and GCP support. If you're a developer who wants fast local testing, a DevOps engineer writing Terraform, or a student learning cloud without the cost, Floci is worth a look! Guest: Hector Ventura Foojay Author page LinkedIn Links On Foojay: Introducing Floci: A High-Performance, GraalVM-Powered AWS Emulator Floci project site Floci on GitHub Migrate from LocalStack Content 00:00…

Is your Java application actually secure, or does it just look that way? In this episode of the Foojay Podcast, Frank is joined by Steve Poole and David Welch, both from HeroDevs, to dig deep into the state of Java security in 2025 and beyond. Steve introduces the concept of zombie dependencies: end-of-life libraries that appear safely dormant but are quietly accumulating vulnerabilities waiting to bite you. David, a co-chair of the CVE Automation Working Group, explains what a CVE actually is, how the identification and disclosure process works in practice, and why AI tools like Mythos are dramatically accelerating the pace at which new vulnerabilities are found — on both sides of the wall. Together they cover how CVEs in the Java runtime are handled through coordinated disclosure, why Maven Central is safer than most ecosystems but not a silver bullet, and what insurance companies are starting to demand from organizations that haven't cleaned up their dependency trees. They also discuss practical steps any…

Foojay.io, the website for the Friends of OpenJDK, is turning six years old. To celebrate, Frank Delporte headed to JCON in Cologne, Germany, and sat down with twelve members of the Java community to talk about what Foojay means to them, what they learn from each other, and how the community is evolving. Foojay is more than a blog. It is a Mastodon server, a Slack community, the Disco API, a book on sustainability, a podcast, and now an education catalog. Six years in, it is still growing, still community-driven, and still very much a place where anyone who works with Java is welcome. 00:00 Introduction 02:16 Sharat Chandar https://www.linkedin.com/in/sharatchander/ Java community and history What you can learn from conferences and articles 05:37 Markus Westergren https://www.linkedin.com/in/markuswestergren/ https://foojay.io/sustainability-for-java-developers/ https://foojay.io/today/join-slack-com-t-foojay-signup/ Book "Sustainability for Java Developers" How to "sustain yourself" in this…

In this episode of the Foojay Podcast, we're bringing you something special: a full batch of hallway-track conversations recorded live at VoxxedDays Amsterdam. Fifteen guests, one conference, and one theme that kept coming back, whether we planned it or not: Java has grown up quietly, steadily, and in ways that still surprise people who haven't looked lately. We talked about migrating between versions, new features in the latest Java releases, authorization done right, AI-assisted coding, cryptography, containers, open-source contributions, GDPR data experiments, and, yes, the things people hate about Java but secretly love. I spoke with Ko Turk, who organized this very conference, Johannes Bechberger, Lutske de Leeuw, Aicha Laafia, Marit van Dijk, Adele Carpenter, Patrick Baumgartner, Sohan Maheshwar, Jeroen Egelmeers, Erwin Manders, Alexander Shopov, Maarten Verburg, Arjan Tijms, Joost Kaan, and Stephan Janssen. That's a lot of people. That's a lot of opinions. And somehow, they mostly agree: update your…

Welcome to another episode of the Foojay Podcast! In this episode, we're talking about Java 26, released on March 17 in the year 26. Again, right on schedule with Java's six-month release cadence. Now, Java 26 is not a Long Term Support (LTS) release; that was Java 25. But don't let that fool you into thinking there's nothing interesting here. This release brings ten JDK Enhancement Proposals (JEPs). They cover everything from performance improvements to long-overdue cleanups. Of those ten JEPS, five are new features, and we also get five preview/incubator features. Guests Simon Ritter https://www.linkedin.com/in/siritter/ Loïc Mathieu https://www.linkedin.com/in/lo%C3%AFc-mathieu-475b144/ Content 00:00 Introduction of topic and guests 01:35 Differences between Long and Short Term Support 05:10 Which Java versions are used by companies https://foojay.io/today/foojay-podcast-90-highlights-of-the-java-features-between-lts-21-and-25/ 07:54 Internal changes and improvements in release 26, highlighting UUIDv7…

In this Foojay Podcast, we're celebrating a major milestone in Java development history: 25 years of IntelliJ IDEA. Think about it: IntelliJ IDEA launched in 2000, and since then, it has become the go-to IDE for millions of Java developers worldwide. From its revolutionary code completion and refactoring tools to AI-powered features and the recent unified Community and Ultimate release, IntelliJ has shaped how we write Java, and keeps reinventing itself to stay ahead. For this episode, I'm joined by three people from the JetBrains team who know this story inside and out. Marit van Dijk, developer advocate and contributor to the Foojay community. Anton Arhipov, also a developer advocate at JetBrains. And Dmitry Jemerov, who has been part of the IntelliJ IDEA story for a very long time. Guests Marit van Dijk https://foojay.io/today/author/marit-van-dijk/ https://www.linkedin.com/in/maritvandijk/ https://mastodon.social/@maritvandijk Anton Arhipov https://www.linkedin.com/in/antonarhipov/ Dmitry Jemerov…

Every six months, we get a new version of Java. Java 26 is just around the corner and will be released soon. But most companies stick to LTS (Long-Term Support) versions, which are maintained and receive security updates for many more years. Versions 8, 11, 17, 21, and 25 are such LTS versions. Hopefully, most of your systems are already on the latest versions and you are not stuck on 8 or earlier. As a reminder, 8 was released in 2014, so much has changed since then.If you are doubting moving from 21 to 25, or even from an earlier version to the latest LTS, this podcast is for you! Together with Jakob Jenkov, we discussed the most important changes, and this episode includes a few quotes from interviews recorded at conferences last year. Guests Jakob Jenkov https://www.linkedin.com/in/jakob-jenkov-4a3a8/ Jonathan Vila https://www.linkedin.com/in/jonathanvila/ Ryan Svihla https://www.linkedin.com/in/ryan-svihla-096752182/ Mary Grygleski https://www.linkedin.com/in/mary-grygleski/ Anton Arhipov…

For this episode of the Foojay Podcast, we invited the author of three recent posts published on Foojay. And he brought a colleague to get even more expert knowledge in this podcast! We talk about Quarkus, how it is "cloud-native", how it compares to other frameworks, the advantages for developers and managers, etc. We also discussed nano businesses and how they can serve as a model for paying creators of digital content, thanks to x402 and ERC-8004. Michal Maléř https://foojay.io/today/author/michal-maler/ https://www.linkedin.com/in/michal-maléř-69344692/ https://www.mickeymaler.com/ Holly Cummins https://www.linkedin.com/in/holly-k-cummins/ https://hollycummins.com/ https://noti.st/holly-cummins Links Quarkus: A Runtime and Framework for Cloud-Native Java Optimizing Java for the Cloud-Native Era with Quarkus Not a Lucid Web3 Dream Anymore: x402, ERC-8004, A2A, and The Next Wave of AI Commerce J-Spring 2023: Five Tricks for Java - Holly Cummins: The code we write has a climate impact. But how big is that…

What turns a nervous first-timer into a confident conference speaker? Let's find out. This the last Foojay Podcast of 2025 and also the last one with interviews recorded at the Devoxx and JFall conferences. Maybe you're already thinking about your goals for 2026: organizing a meetup, submitting your first conference talk, or taking a bigger role in the Java community. If that sounds like you, this episode is for you. I talked with the people behind these conferences and developers at different stages of their speaking journey. At Devoxx, I spoke with Stephan Janssen, who has been organizing Devoxx for 20 years, Susanne Pieterse, about what makes conferences valuable for learning, and Daniël Floor, a developer just starting out with public speaking. At JFall, I caught up with organizers Martin Smelt and Brian Vermeer, Berwout de Vries Robles, who coaches new speakers, and Annelore Egger about her journey from developer to conference speaker. You'll hear practical advice about what makes a good CFP, why…

What if work-life balance is a myth, and the real secret is just... life? In this Foojay Podcast we're stepping away from pure code and diving into something equally important: how we live our lives as developers. Because let's be honest, being a great programmer isn't just about mastering Java or the latest framework. It's about managing your career, your health, your family, and finding purpose in all of it. Four incredible guests are all tackling different pieces of this puzzle. First up, Bruno Souza, the Brazilian Java Man, is back to challenge our thinking about work-life balance and share his philosophy on taking control of your career. Then Patricia Lenten talks about the real challenges of hacking parenting while being an engineer, and how we can inspire the next generation of developers. Georgios Diamantopoulos brings the hard data on why sitting is literally killing us and what we can actually do about it. And finally, April Schuppel shares lessons from Apryse's journey through 15 acquisitions in…

The AI revolution isn't replacing Java developers. No, it's forcing us to think harder. Welcome to another episode of the Foojay Podcast! Today, we're talking about AI and Java, how it's changing the way we work, what we need to watch out for, and why understanding what's really happening matters more than ever. I recorded interviews at Devoxx and JFall and spoke with people who build and use this technology every day. Marianne Hoornenborg opened my eyes to something important: every time an AI generates a token, there's a massive amount of computation happening behind the scenes. Viktor Gamov and Baruch Sadogursky did something really cool: they tested six different AI coding tools live on stage with the same task. The results were all over the place! But they found that the tools with access to good documentation performed much better. Stephen Chin showed me how graph databases can make AI responses more reliable by providing a solid source of truth rather than relying on vector search. Mario Fusco works…

Episode 85 of the Foojay Podcast. All info, show notes, and links are available at https://foojay.io/today/category/podcast/. What if the future of Java depends on who we invite to learn it today? In this Foojay Podcast, we're diving into something that affects all of us in the Java community: How can we inspire the next generation of developers, and how do we make the developer world more inclusive? You'll hear four incredible guests who are actively working to make tech more accessible and inclusive. First, Daniel De Luca talks about Devoxx for Kids and how they support underprivileged students in IT education. Then Kenny Schwegler shares his insights on how we can actively promote diversity and inclusion in tech. Cassandra Chin, the youngest Java Champion and author, talks about inspiring young coders through hands-on projects and making technology fun. And finally, Igor De Souza discusses his mission to bring Java into Raspberry Pi education and bring more Java into coding clubs worldwide. These…

In this Foojay Podcast, we're exploring a critical topic that's becoming increasingly important in our industry: developing sustainable software that is both performant and environmentally friendly. At the Devoxx and JFall conferences, I had fascinating conversations about how we as Java developers can make a real impact on both our cloud costs and our carbon footprint. And it's interesting to learn how these two goals are often perfectly aligned: what's good for your budget is usually good for the planet too. We start with Daniel Witkowski. He published an article on Foojay that takes us on a deep dive into performance tuning. He explains why optimizing your code can have a thousand times more impact than saving 30% on cloud costs, and walks us through his journey of turning a simple integer validation challenge into a masterclass on Java performance optimization. Next, I caught up with Ko Turk, who shares his passion for sustainable engineering and space exploration. He introduces us to Kepler, a tool for…

Welcome to another episode of the Foojay Podcast! Just like in the previous episode, I bring you conversations from two of Europe's premier Java conferences - Devoxx in Belgium and JFall in the Netherlands. At these conferences, I had the opportunity to speak with members of the Java community about topics ranging from the evolution of Java itself to mobile development, performance optimization, and even automotive security. My first guest is Johan Vos, a Java Champion who takes us on a journey through Java's history - from porting Java to Linux in 1995 to his current work on bringing Java and JavaFX to mobile and embedded devices through the Java On Mobile project. Then we'll hear from Stephen Chin, author of "The Definitive Guide to Modern Java Clients with JavaFX," who shares insights on building cross-platform client applications and reflects on how his daughter has followed in his footsteps to become a published author and technology educator. From JFall, Joseph Phillips joins us to discuss Java's…

In this Foojay Podcast, we're diving deep into some of the most exciting developments happening within the OpenJDK and TornadoVM projects. At the Devoxx and JFall conferences, we spoke with several speakers and visitors about some of the major themes that are shaping the future of Java development. The first guest is Moritz Halbritter from the Spring Engineering team. He provides us with more insights into Project Leyden and how it's improving Java startup times through ahead-of-time compilation and profiling. We'll learn how Spring Boot developers can already take advantage of these improvements today. Next, we'll hear from John Cecerralli at Azul about performance optimizations, the evolution from x86 to ARM64 architectures, and how OpenJDK Projects bring improvements to the JVM itself at levels we couldn't achieve before. Then, Balkrishna Rawool will guide us through the world of vector databases and explain how Java's Vector API from Project Panama is perfectly positioned for AI use cases, despite its…

Maven 4 is approaching its release, bringing many improvements to the build tool powering millions of Java projects. In this Foojay Podcast episode, we talk about Apache Maven 4, a significant milestone that has been years in the making. Maven has been the backbone of Java dependency management and build automation since the early 2000s; however, the road to version 4 has been a long and deliberate one. With significant performance improvements, a modernized API for plugin developers, and changes that affect how we think about project structure, Maven 4 represents both an evolution and a revolution. What does this mean for the millions of developers who depend on Maven daily? How should teams prepare for the transition? And what's the story behind the Maven Central Repository changes that have been making headlines? To answer these questions and more, we're joined by a few of the many contributors who are actually building Maven 4 and stewarding its ecosystem. Guests Hervé Boutemy…

This is part 2 of the interviews recorded on September 19th, 2025, at the first AI4Devs Conference (https://amsterdam.ai4devs.io/) in Amsterdam. In Part 1, we explored many AI-related topics as libraries, security, infrastructure, use cases, and more. In this second part, we'll dive into data science, tools for better AI development, Java in the cloud, and get a behind-the-scenes look at how the conference came together. I also asked these guests the same opening question: 'What's your name, and what brings you to this conference?' 00:00 Introduction 00:43 Eileen Kapel Data Scientist, building an evaluating a model, taking the enduser into account https://www.linkedin.com/in/eileenkapel/ 06:13 Jonathan Ellis and Ryan Svihla Coding with AI with Brokk, AI-native code platform, Java language improvements while keeping stability https://www.linkedin.com/in/jbellis/ https://www.linkedin.com/in/ryan-svihla-096752182/ https://brokk.ai/ https://foojay.io/today/indexing-all-of-wikipedia-on-a-laptop/ 16:24 David Parry…

On September 19th, 2025, the first AI4Devs conference (https://amsterdam.ai4devs.io/) took place in Amsterdam. I grabbed my camera and microphone to talk with speakers and attendees about the revolution in AI-powered coding and application development. In this first part, we'll explore Spring libraries, security, infrastructure and scaling, real-world use cases, event streaming, JetBrains tools, and more... I asked all my guests the same opening question: 'What's your name, and what brings you to this conference?' Let's get started! 00:00 Introduction 00:44 Christian Tzolov and Josh Long Spring AI, Spring MCP, Spring Security https://www.linkedin.com/in/joshlong/ https://www.linkedin.com/in/tzolov/ 17:07 Brian Vermeer AI and security and the responsibility of the developer https://www.linkedin.com/in/brianvermeer/ 27:57 Camille Nigon and Maarten Vandeperre Quarkus, Scaling AI applications, the cost of using LLMs https://www.linkedin.com/in/camille-nigon/ https://www.linkedin.com/in/maarten-vandeperre/ 36:15…

Episode 78 of the Foojay Podcast. All info, show notes, and links are available at https://foojay.io/today/category/podcast/. We're excited to present the first episode of the Foojay Podcast's fifth season, marking the release of OpenJDK 25! For the first time, an OpenJDK release is aligned with the year, and we can welcome release 25 in 2025. As usual in the release podcast, I have my regular guest, Simon Ritter. And in this episode, we are joined by Balkrishna Rawool to talk about all the new features in this new OpenJDK version. Guests Simon Ritter https://www.linkedin.com/in/siritter/ Balkrishna Rawool https://www.linkedin.com/in/balkrishnarawool/ Content 00:00 Introduction of topic and guests 01:21 How important is release 25 and upgrading your runtimes? https://jdk.java.net/25/ 06:00 Process of releasing a new OpenJDK version and looking forward to version 26 08:16 What are JEPs and OpenJDK projects 09:20 Project Leyden https://openjdk.org/projects/leyden/ JEP 514: Ahead-of-Time Command-Line Ergonomics…

This is the first Foojay podcast in Spanish. It's also the shortest one and the final of season 4 ;-) Jonathan Vila "highjacked" the microphone from Geertjan Wielenga (See episode 76, https://foojay.io/today/foojay-podcast-76-devbcn-report-part-1-learn-from-the-community/) during the DevBcn conference in Barcelona and interviewed a few of the participants for this first Spanish-only edition of the podcast. Stay tuned and subscribe to the podcast in your favorite app or on YouTube. We're taking a short break and will be back in September with the launch of Java 25! 00:00 Introduction 00:39 Marlene Maldonado, DevBcn Organization https://www.linkedin.com/in/marlene-maldonado-de-s%C3%A1 02:10 Barbara Teruggi, Speaker, Threat Modelling https://www.linkedin.com/in/barbara-teruggi/ 05:04 Santiago Rincon, CFP Member and Attendee https://www.linkedin.com/in/santiago-rincon-martinez 07:56 Marlene Maldonado, Vicente Soriano, Volunteers https://www.linkedin.com/in/visomar…

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 and Jonathan Vila, two of the organizers, he spoke with many visitors about what they like most in Java, how AI influences their work, and what is important to them in the work they do. We have more than 20 people who are passionate about the Java community and are eager to share their knowledge with you. 00:00 Introduction 00:45 Nacho Cougil and Jakub Marchwicki talk about the history of the DevBcn conference. https://www.linkedin.com/in/icougil https://www.linkedin.com/in/kubamarchwicki 02:45 Bert Jan Schrijver is excited about the people in the Java community. https://www.linkedin.com/in/bjschrijver/ 03:06 Ricardo Romero Benítez has a Spanish YouTube challenge about Java and is surprised by the experience of junior developers.…

This is the final part of the JCON 2025 interviews with a lot of tips and tricks! In the three previous podcasts, we featured interviews from the JCON conference on "Being a better Java developer," "Evolutions in Java," and "How to use AI with Java." However, we talked to many more people during the conference, so this podcast focuses on tips and tricks. Let's learn from the many other experienced visitors of JCON. 00:00 Introduction 00:34 Merlin Bögershausen - OpenRewrite and Azul Intelligence Cloud https://www.linkedin.com/in/merlin-boegershausen 07:08 Eberhard Wolff - Measure developer productivity https://www.linkedin.com/in/eberhardwolff 12:28 Annelore Egger - Dealing with bad code, it's not your fault https://www.linkedin.com/in/anneloredev 15:21 Michael Vitz - Unexpected things you can do with Java https://www.linkedin.com/in/michaelvitz 18:40 Michael Simons - Neo4J database models https://www.linkedin.com/in/michael-simons-196712139 https://motherduck.com/duckdb-book-brief 23:13 Stefan Böhringer -…

Let's have an AI Bingo and talk about ChatGPT, LLM, ML, RAG, MCP, GenAI, and more! This is part 3 of the interviews recorded at the JCON conference in May. In the previous parts, you learned more about how to be a better Java developer and how Java has evolved and continues to evolve. Of course, Artificial Intelligence and large language models were hot topics at the conference. This episode collects all the interviews on the AI topic. You will learn more about the different technologies we can use in our Java projects. We also checked with our guests to see how they compare Java to Python for AI-related development. 00:00 Introduction 00:46 Pasha Finkelshteyn - RAG, MCP https://www.linkedin.com/in/asm0dey 06:17 Simone de Gijt - LLM https://www.linkedin.com/in/simonedegijt 12:30 Steve Poole - AI challenges and dangers https://www.linkedin.com/in/noregressions 18:01 Sandra Ahlgrimm - LangChain4J and Microsoft tools https://www.linkedin.com/in/sandraahlgrimm 21:06 Mary Grygleski - Spring AI, Langchain4J,…

In the second part of our JCON interviews, recorded at the conference in May, we focuses on general evolutions within the Java world and how they influence how we write code and develop applications. We take a look back at the history of Java, discuss new features in the latest release, how Java evolves with OpenJDK projects and JEPS, how Java is used in education, and much more... 00:00 Introduction 00:19 Steve Poole – Java APIs in a modern way, History of Java https://www.linkedin.com/in/noregressions 06:42 Hanno Embregts - Java 24, Java in education https://www.linkedin.com/in/hannotify/ 12:20 Karl Heinz Marbaise - Stream gatherers, Java evolutions, JEPs, Java stability https://www.linkedin.com/in/khmarbaise/ 26:19 Cay Horstmann - Project Valhalla, Project Loom, JEPs, OpenJDK projects https://www.linkedin.com/in/cay-horstmann-659a4b/ 34:20 Miro Wengner - Java modules, Robo4J https://www.linkedin.com/in/mwengner/ 37:52 Dmitry Chuyko – Improve startup and performance of Java applications in containers…

On May 13th and 14th, Foojay attended the JCON conference in Köln, Germany, where we did over 30 live-stream interviews. In this episode, we present to you the first set of these interviews, in which we focus on celebrating 30 years of Java, how you can grow your career, become a public speaker and writer, make your code more green, a bit of AI (of course...), and how the connections between open-source contributors can be visualized. 00:00 Introduction 00:37 Richard Fichtner: About JCON https://www.linkedin.com/in/richardfichtner/ https://jcon.one/ 03:27 Bruno Souza: Building your career https://www.linkedin.com/in/brjavaman/ https://careermasterplan.dev 17:09 Markus Westergren: Mentoring and growing to become a senior engineer https://www.linkedin.com/in/markuswestergren/ 21:56 Brian Vermeer: Public speaking, NLJUG, the importance of writing https://www.linkedin.com/in/brianvermeer/ 30:08 Aicha Laafia: Green coding https://www.linkedin.com/in/aicha-laafia-0266a6126/ 36:33 Baruch Sadogursky: History of…

We are celebrating Java's 30th anniversary this May! This is a very special anniversary episode of the Foojay Podcast! As we approach May 23rd, marking exactly 30 years since Java's first beta release in 1995, we're honored to present our first-ever single-guest format. But we have a very special guest for you: James Gosling, the creator of Java! Join us for this exclusive conversation as we explore Java's beginnings, its revolutionary impact on the programming world, its continuous evolution over three decades, and James's insights on where the language is heading. From that groundbreaking beta release over "Write Once, Run Anywhere" to powering billions of devices worldwide, this is the story of Java, told by the man who started it all, the father of Java. Content 00:00 Introduction 01:06 How did it start 35 years ago? 06:21 Java evolved from device controllers to server applications 10:30 How does it feel that so many people use Java? 12:12 Looking back at the Y2K problem and how it triggered more Java…

On April 25, 2020, Geertjan Wielenga published the first Foojay post. Yes, we are celebrating 5 years since the Friends Of OpenJDK website launch! Today, more than 1,600 posts are on the site, written by over 250 authors. And there is much more to discover within the Foojay world... In this podcast, we look at how Foojay started with founder Geertjan Wielenga. We'll also hear from Gerrit Grunwald about how Foojay's Disco API has become part of your daily work without you realizing it. We also have several of our regular authors and podcast guests who share how Foojay has influenced them (and vice versa). Thank you all for being part of the Foojay community, whether as a listener of this podcast, a visitor to the website, a user of the Disco API, or through any other touchpoint! 00:00 Introduction 00:58 Grace Jansen https://foojay.io/today/author/grace-jansen 02:44 Geertjan Wielenga about the start and evolution of Foojay https://foojay.io/today/author/geertjan-wielenga/ Foojay on Mastodon:…

On April 3rd, the first VoxxedDays event in Amsterdam took place. VoxxedDays are tech events organized by local community groups, with support from the Devoxx team. Geertjan Wielenga brought along a camera and microphone and spoke with many of the attendees. This is the first Foojay podcast ever to feature more than 20 guests! Geertjan asked the same two questions to many of conference visitors: “Tell us who you are and what excites you about the technology landscape?” and “What are two tips or insights you’d like to share?” As you might expect, there's a lot of talk about AI and machine learning, but you’ll also hear about new Java features, profiling, open source, security, code reviews, and much more! 00:00 Introduction 00:33 Ko Turk: VoxxedDays organization https://www.linkedin.com/in/ko-turk-b271b929/ 01:34 Stephan Janssen: F ounder of Devoxx and VoxxedDays https://www.linkedin.com/in/stephanjanssen/ 05:27 Lutske de Leeuw: Important new features in Java https://www.linkedin.com/in/lutske/ 06:25 Johannes…

We serve you a podcast about the new Java version every six months. Our regular guest, Simon Ritter, Deputy CTO of Azul, is known on social media as "speakjava." He is part of the OpenJDK vulnerability group, JCP executive committee, and expert group for the Java SE specification request so that he can share a lot of inside information with us. In this episode, we are joined by Hanno Embregts, a Java Developer by day and musician by night. He publishes a post on Foojay with all the details of every new Java release and prepared a long description of all the new features included in Java 24. Let's see what this new release brings us... Guests Simon Ritter https://www.linkedin.com/in/siritter/ https://bsky.app/profile/speakjava.bsky.social Hanno Embregts https://www.linkedin.com/in/hannotify/ https://bsky.app/profile/hanno.codes Content 00:00 Introduction of the topic and guests 00:58 Why 24 JEPs in release 24? 02:16 Overview of the changes in Java 24 03:37 The changes in Hotspot and GC JEP 404: Generational…

Let me share a personal story. I started experimenting with Java on a Raspberry Pi about five years ago and blogged a few articles about it. But the more I experimented, the more I wrote down, and eventually, I had written a book… I worked on it for six months in a row, every evening and a lot of weekends. But the moment I received the box with my author copies was an incredible feeling. Holding a paper book with your name is a special moment. Fast forward to now. The 1000 paper copies are sold out. I have the last 10 copies in case you still want one ;-) But as I self-published the ebook, it's still for sale on Leanpub, and I keep updating it. That's one of the first significant differences between publishing a paper book and an ebook…. As an author, I got about 2 euros per paper book from the publisher, and LeanPub pays 80% royalties. Don't forget that I have to pay taxes on what I earn. So, if you do the math, you'll understand that the book didn't make me rich. But yes, it helped me in my career and was…

In this Foojay podcast, we dive into a few articles that were published recently and focus on code. Igor Kulakov of JetBrains gives us his insights into the tool he created to find duplicate content in documentation. Rijo Sam explains how you can generate real random values and how he created a train departure display. Maxillian Arruda explains in a very detailed post the different ways to construct a complex Java object. And we start with Wim De Troye about the code changes he had to do in a project that got upgraded from Spring Boot 2 to 3. Guests Wim De Troyer https://www.linkedin.com/in/wim-de-troyer-40647b130/ Maximillian Arruda https://www.linkedin.com/in/maxarruda/ Rijo Sam https://www.linkedin.com/in/rijosam19/ Igor Kulakov https://www.linkedin.com/in/inspector-patronum/ https://x.com/flounder4130 Links https://foojay.io/today/the-proper-way-to-define-configuration-properties-in-spring/ https://foojay.io/today/make-the-life-of-your-developer-clients-easier-with-smart-builders/…

With the first Foojay podcast of 2025, we want to help you to boost your career! By now, you've likely had your year-end performance review with your manager and set some goals to advance in the coming year. Are you ready to take your career growth into your own hands? I've invited three fantastic guests who are eager to share their experiences and help you elevate your professional journey. Guests Rafael Del Nero https://www.linkedin.com/in/rafadelnero/ https://www.youtube.com/c/javachallengers https://javachallengers.com Bruno Souza https://www.linkedin.com/in/brjavaman/ https://java.mn Career project/blog: https://code4.life/blog Book: https://careermasterplan.dev Join the newsletter, with daily career tips: https://code4.life Elder Moraes https://www.linkedin.com/in/eldermoraes/ https://www.youtube.com/ElderMoraes https://instagram.com/eldermoraes SouJava (JUG Brazil) https://www.meetup.com/SouJava/ http://soujava.org.br/ Content 00:00 Introduction of topic and guests 01:44 Why are the guests mentors for…

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 writing your own programming language, Project Loom and structured concurrency, learning at conferences, code reviews, creating desktop applications with Java, infrastructure as code, JUG Noord, and much more! Guests Geertjan Wielenga https://www.linkedin.com/in/geertjanwielenga/ Nataliia Dziubenko https://www.linkedin.com/in/nataliia-dziubenko-341919b8/ Hanno Embregts https://www.linkedin.com/in/hannotify/ Hinse ter Schuur https://www.linkedin.com/in/hinseterschuur/ Anthony Goubard https://www.linkedin.com/in/anthonygoubard/ Steffan Norberhuis https://www.linkedin.com/in/steffannorberhuis/ Paulien van Alst https://www.linkedin.com/in/paulienvanalst/ Lutske de Leeuw https://www.linkedin.com/in/lutske/ Johan Hutting Content 00:00 Introduction of topics and guests 01:09 Geertjan Wielenga: OpenJDK evolutions 01:47 The goal of Foojay, the website for the Friends Of OpenJDK…

Last month, I published a Foojay blog post about the risks in systems that are stuck on old or outdated Java versions and got a lot of feedback from developers. Most of them want to move on but get stuck on management decisions, outdated production environments, or one of the many other reasons that keep systems stuck on old Java versions and dependencies... Do you want to bring your system from Java 8 to 23? Did you know that Java 17 already got 13 security releases? And that you can use tools like OpenRewrite to help you update your code? Related Foojay articles Why Java 8 is a Ticking Time Bomb Hiding Within Your Organization https://foojay.io/today/why-java-8-is-a-ticking-time-bomb-hiding-within-your-organization/ How Organizations Became Stuck on Outdated Java Versions https://foojay.io/today/how-organizations-became-stuck-on-outdated-java-versions/ Guests Gerrit Grunwald https://www.linkedin.com/in/gerritgrunwald/ Jonathan Schneider https://www.linkedin.com/in/jonkschneider/ Martijn Dashorst…

AI, LLMs, ChatGPT—these are just a few of the buzzwords of the massive revolution unfolding right now. These tools are reshaping how we work, but they come with a catch: while they help us work faster and smarter, we need to be careful about placing too much trust in them. I’ve spoken with several guests at the JFall conference in the Netherlands actively working with these tools to learn more about them. And I had a chat with Grace Jansen about a recent Foojay blog post Guests Grace Jansen https://www.linkedin.com/in/grace-jansen/ Sean Li https://www.linkedin.com/in/sean-li-568a8414/ John Sterken https://www.linkedin.com/in/jsterken/ David Vlijmincx https://www.linkedin.com/in/david-vlijmincx/ Urs Peter https://www.linkedin.com/in/urs-peter-70a2882/ Joost Kaan https://www.linkedin.com/in/joost-kaan/ Links https://foojay.io/today/run-ai-enabled-jakarta-ee-and-microprofile-applications-with-langchain4j-and-open-liberty/ https://marketplace.visualstudio.com/items?itemName=IBM.wca-eja…

Foojay Podcast published in November 2024 All info, show notes, and links: https://foojay.io/today/category/podcast/ At Devoxx and JFall, we talked with Georgios Diamantopoulos, Lutske de Leeuw, Tom Cools, Jessica Siewert, and Rijo Sam about staying physically and mentally healthy as software developers. There are many topics to handle, like the impact of AI on how valuable we feel, how COVID-19 impacted careers, how we work in and with remote teams, how to get to know new colleagues and much more. Yes, there is even a sidestep where we compared the Java and .NET communities. Guests Georgios Diamantopoulos https://www.linkedin.com/in/georgiosd/ https://x.com/georgiosd Tom Cools https://www.linkedin.com/in/tom-cools-17547548/ https://bsky.app/profile/tcoolsit.bsky.social Lutske de Leeuw https://www.linkedin.com/in/lutske/ Jessica Siewert https://www.linkedin.com/in/jesiewert/ Rijo Sam https://www.linkedin.com/in/rijosam19/ https://github.com/Rijosam Content 00:00 Introduction of topic and guests 00:48…

Belgium might be tiny, but we have a strong Java Community! As I was doing interviews at Devoxx in October, I met several of these people, and we talked about their projects, how you can get involved in OpenJDK, and maybe even start a company out of it. This podcast will teach you more about Devoxx, VoxxedDays, Devoxx4Kids, JobRunr, Timefold, OpenJDK Mobile, OpenJFX, Thymelead, htmx, and more! Guests Stephan Janssen https://www.linkedin.com/in/stephanjanssen/ https://x.com/Stephan007 https://www.devoxx.com https://events.voxxeddays.com https://www.devoxx4kids.org/ Ronald Dehuysser https://www.linkedin.com/in/ronalddehuysser/ https://x.com/rdehuyss https://www.jobrunr.io/en/ Geoffrey De Smet https://www.linkedin.com/in/ge0ffrey/ https://x.com/GeoffreyDeSmet https://timefold.ai/ Johan Vos https://www.linkedin.com/in/johanvos/ https://mastodon.social/@johanvos https://x.com/johanvos https://gluonhq.com/ https://github.com/openjdk/mobile https://github.com/openjdk/jfx/ Wim Deblauwe…

What do people who have Developer Relations as their job description do? And how do you become a conference speaker? You'll learn in this Foojay podcast! At Devoxx in Belgium, I got to talk to Josh Long, Baruch, Pratik Patel, and Roni Dover, who are on the stage because it's part of their job. They share many tips about being a DevRel and the plenty tasks involved in such a job. I also talked with Clo Willaerts who was my inspiration many years ago to become a speaker myself, when I saw her presentation at a marketing conference. Guests Clo Willaerts https://www.linkedin.com/in/clowillaerts/ https://x.com/bnox https://clowillaerts.com/ https://clowillaerts.substack.com/ Josh Long https://x.com/starbuxman https://www.linkedin.com/in/joshlong/ Baruch Sadogursky https://www.linkedin.com/in/jbaruch/ https://x.com/jbaruch Pratik Patel https://www.linkedin.com/in/prpatel/ https://x.com/prpatel Roni Dover https://www.linkedin.com/in/ronidover/ https://x.com/doppleware Content 00:57 Clo about the difference between…

Three years after Log4Shell caused a significant security issue, we still struggle with insecure dependencies and injection problems. In this podcast, we'll discuss how developers can secure their code. I talked with three authors who posted a security and code quality post on Foojay.io. Guests Jonathan Vila https://www.linkedin.com/in/jonathanvila/ https://about.me/jonathan.vila https://twitter.com/jonathan_vila Brian Vermeer https://www.linkedin.com/in/brianvermeer/ https://brianvermeer.nl/ https://twitter.com/BrianVerm Erik Costlow https://www.linkedin.com/in/costlow/ https://twitter.com/costlow Content 00:00 Introduction of topic and guests 01:35 Brian: Why is Log4Shell still around? https://foojay.io/today/the-persistent-threat-why-major-vulnerabilities-like-log4shell-and-spring4shell-remain-significant/ 03:24 Outdated dependencies are still used a lot 04:31 Who is responsible for dependency updates? 07:55 Snyk tools to help discover issues 10:15 Comparing to Dependabot 11:21 How to keep dependencies…

OpenJDK (Java) 23 is here! This version introduces three new features to the language and runtime, many bug fixes, small improvements, and a longer list of preview features. What are the most important facts about this release? Let's find out... Guests Simon Ritter https://www.linkedin.com/in/siritter/ https://mastodon.social/@speakjava https://twitter.com/speakjava Artur Skowroński https://www.linkedin.com/in/arturskowronski/ https://x.com/ArturSkowronski Content 00:00 Introduction 00:49 What OpenJDK version are we on? Foojay post by Loic Mathieu: https://foojay.io/today/java-23-whats-new/ 01:26 Why switch to OpenJDK 23? 02:45 JEP 467: Markdown Documentation Comments https://openjdk.org/jeps/467 04:15 JEP 474: ZGC: Generational Mode by Default https://openjdk.org/jeps/474 https://www.azul.com/blog/what-should-i-know-about-garbage-collection-as-a-java-developer/ https://newrelic.com/resources/report/2024-state-of-the-java-ecosystem 14:17 JEP 471: Deprecate the Memory-Access Methods in sun.misc.Unsafe for…

In this Foojay podcast, we enter the world of mathematics by discussing Vectors and how they are crucial for AI and machine learning. As ChatGPT explains: "A Vector is a mathematical structure that holds numerical values. Vectors are fundamental to the field of Artificial Intelligence, as they allow mathematical operations to be performed efficiently and form the basis of many machine learning algorithms." OK, but how are these vectors crucial for the whole Artificial Intelligence evolution? This is the last podcast of season 3, we're taking a summer break and will be back in September with the release of Java 23 and much more OpenJDK-related topics! Guests Jonathan Ellis https://www.linkedin.com/in/jbellis/ https://x.com/spyced Alexander Chatzizacharias https://www.linkedin.com/in/alexander-chatzizacharias/ https://x.com/alex90_ch Content 00:00 Introduction of the topic and guests 01:57 What is a Vector? https://github.com/openai/tiktoken https://arxiv.org/abs/1301.3781…

As a backend developer, you may not realize that Java was initially born on embedded devices like set-top boxes and gateways. We discussed this topic for the first time almost three years ago in Foojay Podcast #2 with James Gosling, Johan Vos, Erik Costlow, and Frank Delporte (https://foojay.io/today/foojay-podcast-2/). In this episode #55, we look into the history of the Java Micro Edition and how things evolved. Nowadays, with processors becoming increasingly powerful, we can run the exact same Java runtime on any Linux system, from the biggest cloud servers to the smallest Raspberry Pi Zero. Let's find out what can be done with Java in the embedded world. Guests Robert von Burg https://www.linkedin.com/in/eitchme/ https://mstdn.gsi.li/@eitch DaShaun Carter https://www.linkedin.com/in/dashaun/ https://twitter.com/dashaun https://vmst.io/@dashaun Pavel Petroshenko https://www.linkedin.com/in/pavel-petroshenko-5220092/ Content 00:00 Introduction of the topic and guests 04:53 Java is running on more devices…

MIDI is a universal standard for communicating between musical instruments and computers. Within OpenJDK, there is a whole Java package dedicated to MIDI communication and data handling. Is it up to date? Are there better approaches now? And what can we do with music, Java, and Kotlin? Let's find out... Guests Atsushi Eno https://atsushieno.github.io/ https://g0v.social/@atsushieno https://fedibird.com/@atsushieno Geert Bevin https://www.linkedin.com/in/gbevin/ https://gbevin.com/cv/ https://www.uwyn.com/ https://www.gbevin.com/ Content 00:00 Introduction of the topic and guests 04:27 What is MIDI? Learn more about MIDI and the javax.sound implementation in OpenJDK: https://docs.oracle.com/javase/tutorial/sound/overview-MIDI.html https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/sound/midi/package-summary.html https://github.com/openjdk/jdk/tree/master/src/java.desktop/share/classes/javax/sound/midi https://www.baeldung.com/java-packages-vs-javax 09:53 MIDI Polyphonic Expression (MPE)…