Mattias Karlsson: I think it's Brilliant
Duke's Corner
Jim Grisanzio from Oracle Java Developer Relations talks with Mattias Karlsson, Java Champion and prominent developer in the Java community who was also honored with the Java Community Lifetime Achievement recognition at Jfokus in February 2024. “I was shocked and honored — very humbled!” Mattias said about being recognized for his lifetime of achievements in the Java community by Sharat Chander of Oracle’s Java Developer Relations Team. Mattias, a Stockholm-based engineer and long-time leader of the Stockholm Java User Group, shares his journey with Java, from its early days to...
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Venkat Subramaniam: I Teach Because I Learn
Duke's Corner
Jim Grisanzio from Java Developer Relations talks with Venkat Subramaniam who was recognized with the Java Community Lifetime Achievement honors by Oracle’s Sharat Chander at Devoxx UK in May 2024. Venkat is a Java Champion, author, speaker, founder of Agile Developer, co-founder of the dev2next conference, and teacher at the University of Houston. In this conversation, which is part of an ongoing series honoring Java pioneers, Venkat expresses profound humility about his accomplishments and credits industry giants and his passion for learning and sharing technical knowledge. He reflects on...
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Bruno Souza: My Greatest Pride is the Community
Duke's Corner
Jim Grisanzio from Java Developer Relations talks with Bruno Souza, who is a Java Champion, leader of the SouJava User Group in Brazil, and a member of the JCP Executive Committee. Bruno received the first Java Community Lifetime Achievement recognition in October 2022 at JavaOne in Las Vegas. "I was totally surprised! I was jumping up and down! I was so honored! It’s an honor to be a member of that group." he said. Bruno Souza is known as the "JavaMan" from Brazil and that nickname started back at Sun when Java was announced and Bruno started evangelizing the technology. Bruno's message to...
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Trisha Gee: It’s all about Relationships and People
Duke's Corner
Jim Grisanzio from Java Developer Relations talks with Trisha Gee, an author, a Java Champion, and a Developer Advocate at Gradle. In February 2025 at Jfokus in Stockholm Trisha received the Java Community Lifetime Achievement honor from Sharat Chander from Oracle Java Developer Relations. Trisha has been a Java developer for 25 years, and since 2011 she’s been actively blogging, presenting technical sessions at conferences, and evangelizing Java globally. Recently, Trisha has moved from a traditional developer advocate role to more of a facilitator of developer advocacy internally at her...
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Cay Horstmann: Java Still Vibrant After 30 Years
Duke's Corner
Jim Grisanzio from Java Developer Relations talks with Cay Horstmann, a professor, author, and Java Champion. In April in Cologne, Germany at JCON Cay received the Java Community Lifetime Achievement recognition from Sharat Chander on the Oracle Java Developer Relations Team. This conversation covers the evolution of Java, the constant polishing of the library, the upcoming Java 25 release, the six-month release cycle, improvements in the Java language to make the technology more beginner friendly, teaching methodologies, conferences vs unconferences, and also timeless task-driven learning...
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Heinz Kabutz: Really Life Changing!
Duke's Corner
Jim Grisanzio from Java Developer Relations talks with Heinz Kabutz from the Island of Crete in Greece. Heinz has a PhD in Computer Science, publishes the The JavaSpecialists' Newsletter, and runs the JCrete Unconference. Heinz is also a Java Champion and a teacher, and he cares deeply about the technology and the community. Recently, Heinz was recognized for his Lifetime Achievement by Sharat Chander from Oracle Java Developer Relations. “I was on cloud nine! I was so honored,” Heinz said. In this conversation Heinz previews some JEPs in the upcoming Java 25 release, he comments on the...
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Nate Schutta: I Just Love to Learn!
Duke's Corner
Jim Grisanzio from Java Developer Relations talks with Nate Schutta, an author, a teacher, a software architect, and Java Champion. Nate lives in the United States and teaches computer science to university students. He loves teaching and he loves learning, and he specializes in exploring the big picture of complicated systems in his career as a software architect. The conversation covers the Java community, the value for developers if they contribute to Java User Groups (JUGs), the benefits and some possible drawbacks of AI, and the engineering feat that is the Java Virtual Machine (JVM)....
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Francisco Contreras: I Felt Like I Could do Anything!
Duke's Corner
Jim Grisanzio from Java Developer Relations talks with Francisco Contreras, who is a Java developer and a co-organizer at Nicaragua JUG. Francisco has been a Java developer for over 15 years and he runs his own consulting business with customers around the world. He's passionate about Java the technology and also Java the community. "When I learned Java at university I felt like I could do anything with that," he said, talking about how Java enables him to engage developers, write really great software, and also grow a business. But Java goes well beyond just technology. When Francisco had...
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Ivar Grimstad: Java for Everything
Duke's Corner
Jim Grisanzio from Java Developer Relations talks with Ivar Grimstad, who is a Java Champion, a JCP Executive Committee Member, and a Jakarta EE Developer Advocate. Ivar is based in Sweden but travels to over 40 events a year talking about Java and Open Source with thousands of developers. He feels passionately about contributing to Java projects as the best way for young developers to learn Java and connect with the community, especially at Java conferences. Ivar has been working with Java professionally since 2000, but he's been solving problems with code since he was a little kid around 12...
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Duke's Corner Live at JavaOne!
Duke's Corner
The Duke’s Corner Java Podcast contributed an 11 minute segment to the Community Keynote at JavaOne 2025 in California in March. Jim Grisanzio from Oracle Java Developer Relations hosted the program with special guests Cay Horstmann, Marit van Dijk, and Lize Raes. The panel covered the latest bits in Java, how to contribute to the community, and the best bits from JavaOne. Everyone had a great time! Here’s the full Community Keynote session from JavaOne in March 2025: Here's the 11 minute segment in video: https://x.com/jimgris/status/1907660414550176236
info_outlineJim Grisanzio from Oracle Java Developer Relations talks with Mattias Karlsson, Java Champion and prominent developer in the Java community who was also honored with the Java Community Lifetime Achievement recognition at Jfokus in February 2024.
“I was shocked and honored — very humbled!” Mattias said about being recognized for his lifetime of achievements in the Java community by Sharat Chander of Oracle’s Java Developer Relations Team.
Mattias, a Stockholm-based engineer and long-time leader of the Stockholm Java User Group, shares his journey with Java, from its early days to its current role in modern tech ecosystems. He also talks about the evolution of Jfokus, a leading annual Java conference he organizes, which has grown from a small Java user group into a major gathering of over 2,000 developers from diverse backgrounds around the world.
Mattias highlights Java’s enduring appeal, driven by its robust JVM, backward compatibility, and vibrant community. He also reflects on the six-month release cycle, calling it “brilliant” for its balance of stability and innovation, and shares insights on mentoring young developers and using AI to stay updated.
When talking about how students learning programming will inevitably encounter Java due to its widespread use in the industry, Mattias said, “Sooner or later they will end up with Java anyway.”
Finally, the episode underscores the unique culture of the Java community and Jfokus as a conference for its blending of culture, professionalism, and a welcoming atmosphere.
Mattias Karlsson https://x.com/matkar
Jim Grisanzio https://x.com/jimgris
Duke’s Corner https://dukescorner.libsyn.com/site
Podcast Archives, Transcripts, Quotes https://jimgrisanzio.wordpress.com/duke