title: Java library for PDF reader supporting highlighting
body: <p>I would like to build my own <strong>pdf-reader in Java</strong> and would like to have the possibility to <strong>highlight words</strong> in the pdf and save these highlights. </p>
  
  <ol>
  <li><p>I have seen there exist several PDF libraries I can use, but I wonder which would be best to use for this purpose.</p></li>
  <li><p>Is it possible to do this kind of highlighting, and is there a specific library or so to help me do this?</p></li>
  </ol>
  
  <p>Any help is greatly appreciated!</p>