Setting the PATH variable allows you to launch programs via CLI from anywhere on your system. Here's how to set the PATH variable in Windows and make the most of it.

I'm programming in Java most of my work. Right now we switch between 2 projects. One using 1.4 and one is using 1.6. Since I use maven I need to to have JAVA_HOME set to the version to use. I would ...

Java has no notion of a "current working directory" per se IIRC - user.dir is not always set to the directory the user started the app from. You can find that however - search in Google groups.

To test the Java as home directory go to Window -> Start -> Run open cmd and click ok. In command prompt type java and press enter then you should see java installed on your system.