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Jozi JVM User Group (Jozi-JUG)
Welcome to the Jozi JVM User Group! This is a community for anyone passionate about Java Virtual Machine (JVM) languages and related technologies. Whether you're a beginner, a seasoned developer, or somewhere in between, we’d love to have you join us. Our group hosts virtual and physical meetups, creating spaces for learning, sharing, and connection.
For Recruiters
We kindly ask that recruiters, staffing professionals, and headhunters respect this space as a sanctuary for developers. While we appreciate the work you do, Jozi-JUG is exclusively for those who code and create with Java and JVM technologies.
For Developers
Here’s how you can get involved:
- Attend our Meetups: Join us to learn, share, and connect with fellow JVM enthusiasts.
- Speak at a Meetup: Volunteer to share your knowledge by contacting the committee.
- Write for the Community: Contribute articles to our online platform to help grow and enrich the group.
Our Goals
- Foster the growth of the JVM community.
- Share knowledge and experiences to uplift one another.
- Build critical technical skills to support our country’s development.
- Create lasting friendships among Java developers.
- Have fun while learning and collaborating!
Get in Touch
Have a talk idea or a topic you’d like us to cover? Submit your suggestions by emailing [sam@shayward.co.za](mailto:sam@shayward.co.za).
Join us and be part of a vibrant and supportive JVM community!
Bevorstehende Events (2)
Alles ansehen- GraalVM for JDK 25: New Features and Practical TipsLink für Teilnehmer sichtbar
## Details
Ready to unlock the full power of GraalVM?
Whether you're already running blazing-fast Java apps with GraalVM or just Graal-curious, this session is for you.
Join us for a high-energy, deep-dive session with Alina Yurenko, Developer Advocate for GraalVM at Oracle, as she explores what’s new in GraalVM for JDK 25 and how to actually make the most of it.
📅 Date: 23rd Sep 2025
📡 Virtual: https://youtube.com/live/1P5P9gMLTTc
🕒 Timing:
10:00 AM (PT) | 5:00 PM (UTC) | 6:00 PM (BST): Live stream kicks off
10:10 AM (PT) | 5:10 PM (UTC) | 6:10 PM (BST): Session by Alina Yurenko
11:00 AM (PT) | 6:00 PM (UTC) | 7:00 PM (BST): That’s a wrap, live stream endsGraalVM for JDK 25: New Features and Practical Tips
GraalVM is now well recognised as the best way to run Java applications faster, with lower memory overhead, and great startup times. While many organisations have already adopted it, some might still wonder about the best strategies to use it in practice.
In this session, we'll go through strategies for optimising performance and builds, working with libraries and configuration, and deploying production-ready native applications.
We’ll also cover what’s new in GraalVM for JDK 25 (going live in September—stay tuned!) and take a look at some advanced and forward-looking projects, such as:
– ML-based profile inference
– Project Crema
– Native Image Layers
– New `-H:Preserve` modeSpeaker:
Alina Yurenko
Alina is a developer advocate for GraalVM at Oracle Labs, a research & development organisation at Oracle. Loves both programming and natural languages, compilers, and open source.Host:
Andres Almiray
Andres is a Java/Groovy developer and a Java Champion with more than 20 years of experience in software design and development. He has been involved in web and desktop application development since the early days of Java. Andres is a true believer in open source and has participated on popular projects like Groovy, Griffon, and DbUnit, as well as starting his own projects. Founding member of the Griffon framework and Hackergarten community event. Creator of JReleaser.
***Join the Community!
If you haven't joined the Slack community, what are you waiting for? It's the ultimate spot to throw in your questions during our live sessions and mingle with fellow Java enthusiasts from all around the world.
Simply click here to join us: https://bit.ly/vJUG-Slack - The Three Amigos: Intermixing Pattern Matching, Records, and Sealed ClassesDVT Johannesburg, Johannesburg
Agenda:
- 18:00 - Doors Open for Drinks and Snacks and Mingle
- 19:00 - Introduction
- 19:15 - Speaker
- 20:15 - 21:00 - More mingling
Venue: DVT
We ask that you do not RSVP Yes if you are not sure you will be able to attend. We would not want somebody to loose out on the opportunity of seeing Dr Venkat speaking in person.Details:
Speaker: Dr. Venkat SubramaniamAbstract:
One of the coolest aspects of Java is the fact that the newer features simply do not live in isolation, but interplay quite nicely with each other. A place where this is clearly evident is the synergy between records, sealed classes, and pattern matching. In this presentation, we will focus on pattern matching and how its power is enhanced by records and also the sealed classes. The details presented will help you to make the best use of all three features in your own applications.Speaker
Dr. Venkat Subramaniam is an award-winning author, founder of Agile Developer, Inc., an instructional professor at the University of Houston, and creator of the dev2next conference.He has trained and mentored thousands of software developers in the US, Canada, Europe, and Asia, and is a regularly invited speaker at several international conferences. Venkat helps his clients effectively apply and succeed with sustainable agile practices on their software projects.
Venkat is a co-author of multiple technical books, including the 2007 Jolt Productivity Award-winning book Practices of an Agile Developer. You can find a list of his books at https://www.agiledeveloper.com.
Social media links:
LinkedIn: https://www.linkedin.com/in/vsubramaniam
Twitter/X: @venkat_s
Mastodon: https://mastodon.social/@venkats
Bluesky: https://bsky.app/profile/venkats.bsky.socialThe Jozi Java User Group (Jozi-JUG) is dedicated to a harassment-free experience for everyone. Our anti-harassment policy can be found here (https://github.com/Jozi-JUG/constitution/blob/master/anti_harassment_policy.txt)
