If you cannot install Java and see Java Installation Not Completed, Unable to install Java, There are errors in the following switches, use these fixes.

<tl;dr> To fix the Eclipse “No Java virtual machine was found” error, simply edit the eclipse-inst.ini file and add the -vm flag, which points it to the java utility in the JDK bin directory: ...

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 ...

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.

Administrators should direct their users to download and install the update, Oracle added. The blog also describes a manual work-around users can take if they’re unable to upgrade Java.