title: Java/Eclipse: Export classes, interfaces AND REFERENCED LIBRARIES to a jar file
body: <p>I wrote several java-classes and -interfaces.
  These classes are using a referenced library. 
  Without the referenced library, the classes won't work.</p>
  
  <p>I want to export these classes/interfaces to a jar-File. Not a runnable jar, because i want to use this jar-File as a library later.</p>
  
  <p>But it seems, after creating my jar-file, that my referenced library is not included.</p>
  
  <p>Does anyone have an idea, what the problem might be?</p>