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We are pleased to announce the general availability of IBM® Semeru Runtime™ Open Edition 25.0. This Long-Term Support (LTS) release is based on OpenJDK jdk-25+36 and Eclipse OpenJ9 0.55. The binaries are available on our standard distribution sites as on 26th Sep 2025.
Java 25 introduces new language features such as Flexible Constructor Bodies, Module Import Declarations, Scoped Values, Key Derivation Function API etc. It also contains previews for upcoming features such as Primitive Types in Patterns, instanceof, and switch (Third Preview), PEM Encodings of Cryptographic Objects (Preview), Stable Values (Preview), Structured Concurrency (Fifth Preview) etc. You can see the complete list of features that are part of OpenJDK 25 here.
With this release, you can leverage latest Java language features for your Java workload with the help of high performing OpenJ9 JVM that is optimised for cloud environments featuring faster startup and lower memory usage and more.
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