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Someone could tell me how Forge works with mod jar?


Blu3Fat

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Recently I am trying to add some resource into a jar through java. By that I could insert some extern resource like songs when I launch the game. And then I learned about how to insert something into a jar through java. But it seems like we could just "override" a jar but not "insert". That's to say,we have to copy and paste whole jar file then add our files into it. And everytime we do it,we just create a new jar(although it could be totally containing the same content).

And then,I tried to set the insert stage to mod initalization phase. And first time I launch the game,It failed because the ClassnotDefExcetion,I guess that's because some .class files were overrided while running. But after this crash,every launching succeed and I just rerun it. So why it will always crash with ClassnotDefException at the first time but work peacefully after that and the mod just do what it did last time!!

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On 12/2/2022 at 10:19 PM, ChampionAsh5357 said:

Make a resource pack? Or make a mod. Don't try to modify an existing jar.

yep,what I meaned is I want to modify my mod jar itself while running.But that's truly kind of dangerous,maybe I would turn to modify the resource pack instead.

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