What is meant by a "ET INFO JAVA - ClassID" threat?

Where it was flagged by Suricata’s: https://urlquery.net/report/2a9631de-cb19-4051-b8f3-00fa1cc21e91

Outdated php version and TLS recommendations: https://sitecheck.sucuri.net/results/www.swimzy.com
making this website vulnerable.

Retirable jQuery library detected: https://retire.insecurity.today/#!/scan/c698d51903a77190a8051a9b5aa8bc4f7895cbb67e08a11a85e14463299ca1aa

XSS-DOM issues: Results from scanning URL: -http://www.swimzy.com/modules/blocktopmenuswimzy/js/superfish-modified.js
Number of sources found: 38 ; number of sinks found: 21

12 warnings related to this issue detected here: https://ns.tools/swimzy.com

polonus