title: How to merge rows in a JTable dynamically?
body: <p><img src="https://i.stack.imgur.com/GugwT.png" alt="enter image description here"></p>
  
  <p>I want to merge rows as shown in the <code>JTable</code>.  I have no idea about row merging.  I am using <code>DefaultTableModel</code> for rendering data from DB.</p>