ubuntu/jdk

ubuntu/jdk is a rock for jdk maintained by https://canonical.com/.

OpenJDK is the official reference implementation of Java SE since version 7. https://openjdk.org/. This image packs the Java Development Kit, coming from the https://www.openjdk.org/, a free and open source implementation of the Java Platform, Standard Edition (Java SE).

Java is a registered trademark of Oracle and/or its affiliates.

\https://openjdk.org/\]

Tags and Architectures

NOTE: These tags follow a specific naming convention that respects the concept of channels.

Get started

This rock's entrypoint is Pebble, a container-optimized init process that enables the orchestration of a collection of local service processes as an organized set.

\https://documentation.ubuntu.com/pebble/\]

Inspect

To view the https://documentation.ubuntu.com/rockcraft/en/latest/reference/rockcraft-yaml/#services and https://documentation.ubuntu.com/rockcraft/latest/reference/rockcraft-yaml/#checks defined in this rock:

sh
docker run --rm ubuntu/jdk:25-26.04_stable plan

Run

To run this rock, use any of the usual container runtimes, for example, docker:

sh
docker run --name jdk-container \
    --rm -v /path/to/dir/contains/HelloWorld.java:/work -w /work \
    ubuntu/jdk:25-26.04_stable \
    exec java HelloWorld.java

JDK starts and runs the Hello World Java application as defined below, and outputs "Hello, World" to the terminal.

java
// HelloWorld.java
class HelloWorld
{
    public static void main(String args[])
    {
        System.out.println("Hello, World");
    }
}

Get logs

To view the logs of the running container, run:

sh
docker exec jdk-container pebble logs

Or, for a specific service:

sh
docker exec jdk-container pebble logs <service>

Monitor health checks

Rocks may have predefined health checks that you can list by running:

sh
docker exec jdk-container pebble checks

The overall health of your container can be inspected via:

sh
docker exec jdk-container pebble health

Configuration

Environment variables

Application parameters

\https://github.com/canonical/jdk-rock/issues\] \https://github.com/canonical/jdk-rock\]

Canonical is the provider of this container image. It is the user's responsibility to ensure that any use of this image complies with any relevant licenses for all software contained within, as well as with https://canonical.com/legal/intellectual-property-policy.