This post explains how to install Java or check which version is running on your machine. Install on any OS, and learn about the JDK.

If Java is not recognized as internal or external command, you need to make sure that the installation is not problematic and its path is recognized as system variables.

Oracle's newly released Java 7 runtime is relatively painless to install and uninstall.

Jack Wallen walks you through the process of deploying the open-source GlassFish Java Application server on the latest release of Ubuntu Server.