ide-java
                                
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                        Problem with maven
I have a Problem with diagnostics. It works on normal Hello world like java file but when I have more complex Projects in Maven there are strange errors. The project are Working by the way.

I have the same issue (although using gradle instead of maven and on macOS). It seems that the Eclipse language server can't find the standard library, although I am not sure why. The project compiles fine with gradle.