There seems to be a problem with sbt based projects that are purely Java: The `libraryDependencies` are not seen by the compiler. For example:
autoScalaLibrary := false
crossPaths := false
mainClass := Some("de.sciss.eisenkraut.Main")
libraryDependencies += "de.sciss" % "weblaf" % "1.28"
Here I have some Java source code `Main.java`. Inside I use the WebLaF library, but the package imports and classes of WebLaF are red. In the Project Settings, the library has correctly been created, but the compilation fails:
Error:(28, 28) java: package com.alee.laf.toolbar does not exist