OpenJDK is an open source version of Java Development Kit and is available on most Linux package repositories. Sadly, the version is quite outdated since Java programs today are compiled for the latest Java Environment (which is now version 10), the package found on most Linux repositories is still in previous stable release ie., v1.8. This article will guide you on how to install the latest OpenJDK on your Linux computer, and how to set its environment variables so you can start right away with your Java project.