What version of Java do I have?
This page tells you which version of Java you have installed (provided that you do actually have Java installed).
It's important to keep Java up to date, so that you get access to the latest features, but most importantly to ensure that you do not have any security vulnerabilities.
If you don't have Java installed and would like to, or wish to update it, you can download the latest version of Java from Oracle.
Java exploits continue to be discovered; please keep yourself and others safe on the net by keeping your version of Java up to date. Only install Java if you actually need it.
If you have any more questions, use the contact form and we'll answer it and add your question here.