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.

Don't get too far away from your code in the development process. These five Java command-line tools help bring you back to your code base and ease JDK troubleshooting.

With the source code written, the JUnit-based unit tests written, and the NetBeans Java Application project set up as shown above, it is almost trivial to run the unit tests.