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 ...

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.

It is primarily used to run apps that need a command-line interface (CLI). On the other hand, the javaw.exe executable can run Java programs without the console window or command prompt.