A Java version checker is an online tool that checks a Windows computer to ensure it has the recommended Java version. It identifies versions that are outdated and prompts a user to uninstall or update.
If a computer has java installed and enabled, the version checker displays its version in a box. If there is no version or the box, then there is no Java on the computer. A person can visit Java.com to download the latest version of Java.
After installing, one should restart the browser to enable the new version. Some Java version checkers are available on Java.com, Javatester.org and Nasa.gov. A person should check all the different browsers on a computer to see the version.