One way to find JAVA_HOME is to open the environment variable editor and view its assigned value. Another option is to echo JAVA_HOME in a command window. Programs that get JAVA_HOME on startup. Any ...

If you want to switch to Java 18, locate and type the associated number for Java 18 and hit Enter on your keyboard. The system will set Java 18 as the current version.

Here are the three easiest ways to fix Java’s “not recognized as an internal or external command” error: Install or reinstall Java and the JDK on your computer Add Java’s bin directory to the computer ...