Paketo Buildpacks add support for Java 25

Java 25 is now available from Java buildpacks

The Paketo Buildpacks team is excited to announce that, after only 3 days since the first Java 25 builds appeared, Java 25 is now an option for your Paketo Buildpacks Java builds.

Check out those release notes!

https://github.com/paketo-buildpacks/java/releases/tag/v18.14.0

https://github.com/paketo-buildpacks/java-native-image/releases/tag/v11.17.0

But even better, try them out now!

First option: force Java to 25 using BP_JVM_VERSION

cd paketo-buildpacks/samples/java/maven
pack config default-builder paketobuildpacks/builder-noble-java-tiny:latest
pack build applications/maven --env BP_JVM_VERSION=25
[...]
[builder]     Using Java version 25 from BP_JVM_VERSION
[...]

Second option: set your `.sdkmanrc` to Java 25

cd paketo-buildpacks/samples/java/maven
sdk install java 25-zulu
sdk use java 25-zulu
sdk env init
cat .sdkmanrc 
java=25-zulu

pack config default-builder paketobuildpacks/builder-noble-java-tiny:latest
pack build applications/maven
[...]
[builder]     Using Java version 25 extracted from .sdkmanrc
[builder]   BellSoft Liberica JDK 25.0.0: Contributing to layer
[builder]     Downloading from https://github.com/bell-sw/Liberica/releases/download/25+37/bellsoft-jdk25+37-linux-aarch64.tar.gz
[...]

What about the other JDK / JRE distributions?

At the time of writing: Azul Zulu, Bellsoft Liberica (not NIK yet), Oracle and GraalVM, SAP Machine, Amazon Corretto all got upgraded to support Java 25 (and lost support for Java 24)

As a reminder, you can choose your JVM distribution specifying its buildpack:

pack build applications/maven  --buildpack paketobuildpacks/azul-zulu:latest --buildpack paketobuildpacks/java:latest --env BP_JVM_VERSION=25
[...]
[builder]     Using Java version 25 from BP_JVM_VERSION
[builder]   Azul Zulu JDK 25.0.0: Contributing to layer
[builder]     Downloading from https://cdn.azul.com/zulu/bin/zulu25.28.85-ca-jdk25.0.0-linux_aarch64.tar.gz
[...]

Alibaba Dragonwell, Microsoft OpenJDK, Adoptium, IBM Semeru OpenJ9, Adoptium Temurin did not publish JDK 25 builds yet.

What about Java 24?

Java 24 is not an LTS version, so we no longer bundle it.

See the RFC for more explanation.

Why Java 25 isn’t the default?

Java 25 is an LTS version, so in 1 year it will be the default.