title: Looking for Java library to create a block diagram
body: <p>I'm looking for a Java library to create block diagrams, which might look as in the picture: </p>
  
  <p><img src="https://i.stack.imgur.com/BjykE.png" alt="enter image description here"></p>
  
  <p>So far I couldn't find a satisfying solution. I would be thankful for any suggestions. </p>