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 https://openjdk.org/jeps/514 JEP 515: Ahead-of-Time Method Profiling https://openjdk.org/jeps/515 11:28 Leyden compared to other solutions 16:21 Project Valhalla https://openjdk.org/projects/valhalla/ 17:06 JEP 519: Compact Object Headers https://openjdk.org/jeps/519 17:40 JEP 508: Vector API (Tenth Incubator) https://openjdk.org/jeps/508 18:58 Why Vector API is taking a long time to get finalized 21:04 JEP 502: Stable (Immutable) Values https://openjdk.org/jeps/502 23:17 Project Loom https://openjdk.org/projects/loom/ 23:30 JEP 506: Scoped Values https://openjdk.org/jeps/506 24:13 JEP 505: Structured Concurrency (Fifth Preview) https://openjdk.org/jeps/505 29:22 How Java evolved over 30 years 33:34 Project Amber https://openjdk.org/projects/amber/ 34:28 JEP 507: Primitive Types in Patterns, instanceof, and switch (Third Preview) https://openjdk.org/jeps/507 35:59 JEP 512: Compact Source Files and Instance Main Methods https://openjdk.org/jeps/512 37:36 JEP 511: Module Import Declarations https://openjdk.org/jeps/511 38:36 JEP 513: Flexible Constructor Bodies https://openjdk.org/jeps/513 39:12 What's next in Project Amber 43:25 What you can learn from JEPs, OpenJDK projects, and mailing lists 44:21 JEP 521: Generational Shenandoah https://openjdk.org/jeps/521 Trash Talk by Gerrit Grunwald https://www.youtube.com/watch?v=xlwDe-hlSdI 48:16 JEP 510: Key Derivation Function API https://openjdk.org/jeps/510 49:30 JEP 470: PEM Encodings of Cryptographic Objects (Preview) https://openjdk.org/jeps/470 51:28 About Java Flight Recorder 52:27 JEP 509: JFR CPU-Time Profiling (Experimental) https://openjdk.org/jeps/509 52:44 JEP 518: JFR Cooperative Sampling https://openjdk.org/jeps/518 53:15 JEP 520: JFR Method Timing & Tracing https://openjdk.org/jeps/520 53:38 More about JFR and comparing with GC logs 57:04 JEP 503: Remove the 32-bit x86 Port https://openjdk.org/jeps/503 58:54 Looking forward to the following versions 01:00:58 Conclusion

foojay is a place for friends of OpenJDK, a one stop shop for all things Java. Learn More.

foojay is the place for all OpenJDK Update Release Information. Learn More.

In this video, I talk with Geertjan, the Java Champion, Azul director and community manager from Foojay (Friends of JDK) and he shares his career path and how to contribute with Foojay so you boost your Java career. To contact Geertjan on LinkedIn: https://www.linkedin.com/in/geertjanwielenga/ Or on X: https://x.com/GeertjanW If you are interested in contributing to Foojay, here is the link:https://foojay.io/today/join-slack-com-t-foojay-signup/ Here is his book - Developer, Advocate!: Conversations on turning a passion for talking about tech into a career: https://amzn.to/4afYna4

In this series, I'm focusing on what's old in the JDK, not that known, and can be useful. A few hidden gems in the JDK.

jbang --java 25 -i [jbang] Downloading JDK 25. Be patient, this can take several minutes... [jbang] Installing JDK 25... [jbang] [ERROR] Unable to download or install JDK version 25 [jbang] Run wit...

foojay is the place for all OpenJDK Update Release Information. Learn More.

Interview with Michael Simons at JCON

foojay is the place for all OpenJDK Update Release Information. Learn More.

foojay is the place for all OpenJDK Update Release Information. Learn More.

foojay is the place for all OpenJDK Update Release Information. Learn More.

foojay is the place for all OpenJDK Update Release Information. Learn More.

foojay is the place for all OpenJDK Update Release Information. Learn More.

Clean your Memory: exploring approaches for cleaning native resources, starting from finalize() method to the Cleaner API