Its hard to explain

[ImTLOD]

I basically wanted to change a mod made from another person (for private use only). I decompiled all .class files to .java files, pasted the files in my intellij project. Now here is where the problems start: Many lines of the code have something like "mc.func_147104_D" or "mc.field_71439". Now this isnt the part I want to edit, but it is marked red all the time, giving hundreds of errors. Do I have to reference something to fix this or how can I fix this? If you don't want to help, or this topic will just get deleted because I'm trying to modify another one's code without their permission, thats fine, I understand. Thanks in advance

Edited March 8, 2021 by ImTLOD

[Beethoven92]

You cannot use that decompiled code in your IDE at all..question, do you know Java?