keycloak/docs/documentation/server_development/topics/preface.adoc
Michal Vavřík 8e816f749c
feat: Update container images to use OpenJDK 25 (#46386)
This PR is mostly based on 303446b465.
Additionally, I made few tweaks to documentation and introduce a doc variable for the recommended Java version so limit required changing when migrating the recommended JDK version.

* Closes: https://github.com/keycloak/keycloak/issues/45830

Signed-off-by: Michal Vavřík <michal.vavrik@aol.com>
2026-02-17 15:35:46 +01:00

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== Preface
=== Container Images
The official {project_name} container image uses OpenJDK {jdk_version_recommended} as the Java runtime environment.
Consider this when writing custom extensions.
=== Example Listings
In some of the example listings, what is meant to be displayed on one line does not fit inside the available page width. These lines have been broken up. A '\' at the end of a line means that a break has been introduced to fit in the page, with the following lines indented.
So:
[source]
----
Let's pretend to have an extremely \
long line that \
does not fit
This one is short
----
Is really:
[source]
----
Let's pretend to have an extremely long line that does not fit
This one is short
----