title: javafx: how to check if a date is greater than today's date?
body: <p>If I have:</p>
  
  <pre><code>DatePicker dp = new DataPicker();
  </code></pre>
  
  <p>and at some point I want to know if the data is greater than today, how can I do it?</p>
  
  <p>Example:
  if I want to book a room in a hotel from 21/04/2014 well, it should be impossible because today is 28/07/2014.</p>
  
  <p>How can I do it in JavaFX ?</p>