Jar files won't run, Java acting up. Help!

Spork829 · September 11, 2020

Hi everyone! Been setting up a modded Minecraft server with some friends today. Everyone's installs went smoothly, except one. He downloaded java to run the Forge .jar file, and the file appears to be associated with Java based on the thumbnail image. However the .jar file refused to open, it would just run a cmd window for a split second, then close.

The default programs menu doesn't even seem to know Java exists, so I think it's an issue with his install of Java, but uninstalling and reinstalling doesn't do anything.

I thought our best bet would be this registry cleanup thing: https://java.com/en/download/help/manual_regedit.xml#java7

The Microsoft tool they link goes to a 404, so I had to try the manual option.

But alas, he installed (then uninstalled, multiple times) Java version 8, and this only gives instructions for versions 7.0 and older. When I tried searching in the specified folder for 8.0 using the same format, it didn't come up with anything.

We just need to run a damn .jar file! What can be done??

Thanks!

PineyCreek · September 11, 2020

Check to see if Java's included in the PATH settings:

https://gaming.stackexchange.com/questions/169429/minecraft-wont-run-after-updating-java

There's also a few other items in that thread that may help. Sorry I don't have experience with this directly. Last time I touched Minecraft was about 8 years ago setting up 100 PCs and their network gear for a convention display.