title: How do I add an empty row to JTable?
body: <p>is there any way to an add empty row to jtable, where the first column is boolean, so it won't display the auto-generated checkbox? </p>
  
  <p>I need it to separate groups of rows. 
  I tried using the code below, but it is NOT working:</p>
  
  <pre><code>model.addRow(new Object[]{null,null,null,null});
  </code></pre>