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 ...

How can players fix the JNI Error? In most cases, the JNI error can be fixed simply by updating Java on the device to match the latest release. In this case, it's Java 16.

The error Java update did not complete, Error Code 1618 prevents users from installing or updating Java on their system. Here is a working fix.