Finally got around to making an auto-updater and launcher for my game!
It will check the login credentials against my website when downloading and updating the game, but one it's downloaded you can play just fine without logging in or being connected to the internet
If there is an update it will ask if you want it, then automatically download and run the latest version.
I also didn't want this to just be a jar file that users ran, so I wrapped it in an exe with Launch4j
. Now all you will have to do is download the exe from my website and the rest will handle itself