title: Apache poi - Thousand separator
body: <p>Do you know how can I set the thousand sepator and have a value formatted like this? <code>403.000</code></p>
  
  <p>I'm using apache-poi 3.8 with Java.
  I googled it a lot but I didn't find an answer. I can't use a string value because my formulas are not evaluated correctly in this way. Any help? thanks!</p>
  
  <p>I've tried something like this:</p>
  
  <pre><code>cellStyle.setDataFormat(creationHelper.createDataFormat().getFormat("#.##0")); 
  </code></pre>
  
  <p>but it doesn't work..</p>