Version: forge-1.12.2-14.23.5.2768-mdk Using IntelliJ Community 2018.3 I'm relatively new to this whole thing, and I'm having an issue where importing certain classes within the same packages into a certain other file fails for some reason. "MessageMod" is the main "@Mod" class. So my issue is th... More on forums.minecraftforge.net

Make sure that the Java sdk is configured correctly.

https://stackoverflow.com/questions/16765726/how-to-set-intellij-idea-project-sdk#16765841

And make sure that your sources directory is set as sources root

https://www.jetbrains.com/help/idea/content-roots.html

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`src/main/*.java` will only pickup the java files directly under `src/main`. Try typing `ls /src/main/*.java` and you will see what I mean. If your OS supports it you can try a globstar: `src/main/**/*.java` but really you should be letting your IDE compile for you or use a build tool such as maven or gradle. I would recommend IntelliJ over VS code too for Java. More on reddit.com

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