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.

Learn how to set JAVA_HOME as the Environment variable in Windows and also how to check or test the JAVA_HOME configuration setup using CMD.

If you want a more detailed explanation of what System & User Environment Variables are, you can read the linked post. How to set PATH variables manually on Windows 11/10 ...