fix: make javacheck work down to java 5

[DioEgizio]

also adds reuse because why not

[TheKodeToad]

this makes it on par with the launcher one as it brings back support for java 7

Huh? It was already being built for Java 7 lol

Is there much point to this if it won't launch because of NewLaunch anyway? (somehow I think getting NewLaunch to work on Java 5 wouldn't be much fun, I don't actually know how many features it's lacking but it was the first one with generics xD)

[DioEgizio]

Huh? It was already being built for Java 7 lol

i was so convinced it was being built against java8 for some reason, just realized it isn't xD (maybe because of this commit message DioEgizio@6b8aafa ???)

but yeah running down to java 7 isn't very useful except for fixing things like PrismLauncher/PrismLauncher#4762

[TheKodeToad]

Ah that's annoying I guess if you need to uninstall those versions (though they are probably pretty insecure)

maybe because of this commit message

I think the reason I updated it to Java 8 is that it couldn't find temurin for Java 7 xD

[TheKodeToad]

Are we ever going to use this in the launcher anyway though?

[DioEgizio]

Are we ever going to use this in the launcher anyway though?

maybe if we wanna switch away from having java code in-launcher and we wanna move everything to meta :/