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.

JAVA_HOME is an operating system environment variable that directs a user to the file system location where the JDK or JRE was installed.

If you want to download and install Java JDK 18 on Windows 11/10 computer, you will also have to set up a Path in Environment Variable.