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.

How to install Java on your computer To run Java apps, open JAR files or compile some source code into bytecode you’ll need to install Java. To download and install Java on Windows, MacOS or Ubuntu, ...

The JDK is the development platform for building Java applications. Learn about different JDK versions, then install a JDK in your development environment and use it to compile a Java program.

This is an in-depth java tutorial for beginners. Learn what Java is, how to get started, and how to build basic apps using key concepts!

Need to serve your java apps from a user-friend web app? Look no further than Tomcat. Find out how to install Tomcat on Ubuntu Linux.