Foojay Podcast #78: Welcome to OpenJDK 25!
- September 15, 2025
- 141 Unique Views
- 2 min read
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.
Video
Podcast (Audio Only)
Guests
- Simon Ritter
- Balkrishna Rawool
Content
00:00 Introduction of topic and guests
01:21 How important is release 25 and upgrading your runtimes?
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
- JEP 515: Ahead-of-Time Method Profiling
11:28 Leyden compared to other solutions
16:21 Project Valhalla
17:06 JEP 519: Compact Object Headers
17:40 JEP 508: Vector API (Tenth Incubator)
18:58 Why Vector API is taking a long time to get finalized
21:04 JEP 502: Stable (Immutable) Values
23:17 Project Loom
23:30 JEP 506: Scoped Values
24:13 JEP 505: Structured Concurrency (Fifth Preview)
29:22 How Java evolved over 30 years
33:34 Project Amber
34:28 JEP 507: Primitive Types in Patterns, instanceof, and switch (Third Preview)
35:59 JEP 512: Compact Source Files and Instance Main Methods
37:36 JEP 511: Module Import Declarations
38:36 JEP 513: Flexible Constructor Bodies
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
48:16 JEP 510: Key Derivation Function API
49:30 JEP 470: PEM Encodings of Cryptographic Objects (Preview)
51:28 About Java Flight Recorder
52:27 JEP 509: JFR CPU-Time Profiling (Experimental)
52:44 JEP 518: JFR Cooperative Sampling
53:15 JEP 520: JFR Method Timing & Tracing
53:38 More about JFR and comparing with GC logs
57:04 JEP 503: Remove the 32-bit x86 Port
58:54 Looking forward to the following versions
01:00:58 Conclusion
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Frank Delporte is a Java Champion, Java Developer, Technical Writer at Azul, Blogger, Author of "Getting started with Java on Raspberry Pi", and Pi4J Contributor. Frank blogs about his experiments with Java and JavaFX, sometimes combined with electronic components, on the Raspberry Pi.
Simon is Deputy CTO at Azul.
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