Be mindful though, if you build your own JDK, of course you’ll need to rebuild it if you want to pull in updates. Environment variables for a user can be defined in ~/.profile:Įxport PATH=$PATH:$JAVA_HOME/bin Conclusionīuilding OpenJDK 8 is fast and easy. Lastly, the JAVA_HOME environment variable needs to be setup and the $JAVA_HOME/bin directory could be added to the PATH. Sudo ln -s /usr/lib/jvm/openjdk- /usr/lib/jvm/openjdk-8 Sudo mv sources/openjdk8/build/linux-x86-64-normal-server-release/images/j2sdk-image /usr/lib/jvm/openjdk. For convenience I also set up a symlink ‘ openjdk-8‘ pointingÂ to the previous directory.

The previously downloaded OpenJDK 7 was installed to /usr/lib/jvm, so I copied the SDK directory to /usr/lib/jvm/openjdk-1.8.0-jdk8u60-b10. Running bin/java -version in the SDK directory reveals the exact version of your build, in my case 8u60-b10. You’ll find a directory for the Java Runtime Environment and one for the Software Development Kit. The build step produces its output in sources/openjdk8/build/linux-x86_64-normal-server-release/images. Sudo apt-get remove openjdk-7-jre-headlessĪdditional details can be found in the Github repository where the build scripts are pulled from. obuildfactory/openjdk8/linux/standalone-job.shĪfter the build has finished (~25 minutes), you can remove the OpenJDK 7: The resulting SDK is capable of working with Lambdas, anyway. I assume the documentation is a bit out of date there. However, in the actual source of the scripts, no such distinction is made. The documentation of the script makes a distinction between Java 8 and Java 8 with Lambdas. Now that we have the build scripts, we can initiate the build by starting the linux build script. In order to build OpenJDK 8, we clone this repository. Sudo apt-get install openjdk-7-jdk Getting the build scriptsĪ Github repository exists that provides build scripts for different OpenJDK versions. Sudo apt-get install libasound2-dev libcups2-dev libfreetype6-dev Sudo apt-get install libX11-dev libxext-dev libxrender-dev libxtst-dev Sudo apt-get install ca-certificates ca-certificates-java Sudo apt-get install git mercurial zip bzip2 unzip tar curl Note that we are installing OpenJDK 7, which is required to bootstrap the build. In preparation of the build, a few depencencies need to be installed.

It references a blog post that explains the required steps and it’s actually quite easy. Unfortunatly there’s only OpenJDK 7 available as a pre-built package and suggests building it from scratch.

As part of setting up my new Ubuntu notebook I wanted to have Java 8 as the default JDK.

Sudo apt get install openjdk 7 jdk