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.

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.

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.

If you've run into common JAVA_HOME errors such as JAVA_HOME not found or JAVA_HOME set to an invalid directory, we've got the fix for you with these tips.

Why Can't I Change Directory in CMD? If the working folder doesn't change in Command Prompt, you might have made a mistake or your permissions might be set incorrectly.