How to install a specific version of Java 8 using Dockerfile

Question

I am trying to build a Docker Container (using a Dockerfile) with a specific version of Java 8 on it. A lot of the examples target the latest release.

RUN add-apt-repository -y ppa:webupd8team/java
RUN apt-get update -y

RUN echo oracle-java8-installer shared/accepted-oracle-license-v1-1 select true | sudo /usr/bin/debconf-set-selections
RUN apt-get install -y oracle-java8-installer

I have a need where i want to control the specific version of Java that my container is provisioned. Any hint on how to achieve this? For Example Java 8 update 31.

Solution

As most PPA packages pack the latest stable version, I would recommend installing Java manually from Oracle, just like in this answer.

You can do all the work in the script too, the steps are:

• get the tarball with wget,
• untar it with tar -xz,
• use update-alternatives to set is as default