frolvlad/alpine-java repository overview

⁠Java Docker image

This image is based on Alpine Linux image, which is only a 5MB image, and contains Java runtime (JRE) and Java development kit (JDK) conveniently packaged into separate Docker tags.

You must accept the Oracle Binary Code License Agreement for Java SE⁠ to use this image (see issue #6⁠ for details).

JDK bundle contains lots of unnecessary for Docker image stuff, so it was cleaned up. There are 3 tags: *-full (only src tarballs get removed), *-cleaned (desktop parts get cleaned), *-slim (everything but compiler and jvm is removed). master branch refers to jdk8-slim tag, but latest tag points to jdk8-cleaned.

jdk8-slim (master branch) download image size is:

jdk8-cleaned (latest tag) download image size is:

jdk8-full download image size is:

Consider using jre* tags of this image if you only need JRE (you can run Java applications, but cannot build/compile them):

jre8-slim (master branch) download image size is:

jre8-cleaned (latest tag) download image size is:

jre8-full download image size is:

⁠Usage Example

$ echo 'public class Main { public static void main(String[] args) { System.out.println("Hello World"); } }' > Main.java
$ docker run --rm -v "$(pwd)":/mnt --workdir /mnt frolvlad/alpine-java:jdk8-slim sh -c "javac Main.java && java Main"

Once you have run this command you will get printed 'Hello World' from Java!

⁠Tips

Use Docker multi-stage builds⁠ to slim down your final Docker images:

FROM frolvlad/alpine-java:jdk8-slim AS builder

RUN echo 'public class Main { public static void main(String[] args) { System.out.println("Hello World"); } }' > Main.java
RUN javac Main.java

FROM frolvlad/alpine-java:jre8-slim
COPY --from=builder /Main.class /

CMD ["java", "Main"]

$ docker build -t my-app .
$ docker run --rm my-app
Hello World

Your application image is going to be only 119MB on disk.