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Home » Newcomers » Newcomers » How do I edit a jar file?
How do I edit a jar file? [message #1827090] Thu, 07 May 2020 00:33
billy bobby is currently offline billy bobbyFriend
Messages: 1
Registered: May 2020
Junior Member
Hi, I just recently downloaded eclipse because I had a jar file that I wanted to edit. However now I have no clue how to do that. How do you develop a jar file in eclipse?

What I've tried so far:

Just decompiling the file: gives me tons of errors because the file is quite big.

Decompiling the folder that I want to edit as well as the main class, then making a new jar file with everything else, and adding that as an external library. This got close, but when I try to run the program it says
java.lang.module.FindException: Unable to derive module descriptor for [filepath] 
Caused by: java.lang.module.InvalidModuleDescriptorException: bhn$a.class found in top-level directory (unnamed package not allowed in module)

So at the moment I'm pretty stuck, and I have no idea if I'm even headed down the right path. What other things should I try to be able to edit this jar file?
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