If Java is not recognized as internal or external command, you need to make sure that the installation is not problematic and its path is recognized as system variables.

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 ...

Disabling Java in OS X requires doing so for each user account; however, even terminal commands for doing this may be a bit impractical to use as a substitute.