To do the same, open Command Prompt and then run the following command to check which version of Java is installed on your computer.

But these aforementioned Java command-line tools -- namely, javac, javap, jstat, jdeps and jar -- are the five that serious software developers need to know.

There are three simple ways to set JAVA_HOME in Windows. This tutorial shows you how to do it manually, from the command line and through the installer.

Which version of Java should you use in Linux? Learn how to easily switch between different versions with a tutorial from Jack Wallen.