java - "Cannot resolve symbol" in Intellij IDEA -


i'm new intellij , java , unable use libraries 1 "module" in another. seeing red class names , getting "cannot resolve symbol ..." errors on place:

enter image description here

the other modules referenced in file | project structure other module's paths correct , include *.classes i'm trying use:

enter image description here

i have tried file | invalidate caches still having same problems.

what need fix this?

you need add external libraries/classes under dependencies in order idea see them when doing code analysis/autocomplete.


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