The current default and LTS version is Java 11. You can also decide which version you want on your system by installing a specific version number. You can install one or several Java packages. However, bear in mind the license only allows non-commercial use of the software. You can find the official Oracle JDK through a third-party repository. You use JRE for running Java-based applications, while JDK is for developing and programming with Java.Īlso available is Oracle Java, another SE implementation, which has additional commercial features. The Ubuntu repository offers two (2), open-source Java packages, Java Development Kit (Open JDK) and Java Runtime Environment (Open JRE). In this document, we look at different packages within the Java SE. Access to the command-line/terminal window.Installing Java on CentOS 7 or CentOS 8.If you are looking for other Java installation guides, please refer to: Note: This guide provides instructions that work on Ubuntu 18.04, Ubuntu 20.04 and any other Ubuntu-based distribution (including Linux Mint, Kubuntu, and Elementary OS).