Add supported java detection

[RadekCap]

Maybe it would be useful to add detection of the supported version of java. When the application starts on an unsupported version it could print some message in UI or into logs.

[sparkoo]

I'm not sure it's worth to have runtime check for this. I don't even know on which versions does it run. Do you? Maybe only check something like 11+ is ok. Feel free to create PR.