You can add a new User Variable, System Variable, edit a Variable, etc. Learn how to use Environment Variable Editor in PowerToys in Windows 11.

The Java Runtime Environment is updated for each new version of Java, and its version numbers align with the Java platform versioning system, so for example JRE 1.19 runs Java 19.

If you want a more detailed explanation of what System & User Environment Variables are, you can read the linked post. How to set PATH variables manually on Windows 11/10 ...

This web page contains information about the Add or Remove Programs control panel entry - Java 2 Runtime Environment, SE v1.4.2_03. More information can be found by visiting this search result.