title: Why setValue at not working on Jtable?
body: <p>I am doing project on java.<br>
  In one of the class, I am working on jtable.<br>
  Now what i am doing is, </p>
  
  <ul>
  <li>In the table data will be loaded from the database.</li>
  </ul>
  
  <p>Now i want to change some value at some exact row and column.</p>
  
  <p>so for that i am using jtable's setValue function.
  which is like this....</p>
  
  <pre><code>grayCardTbl.setValueAt(Float.valueOf(String.valueOf(pdiff)),1,4);
  </code></pre>
  
  <p>I have checked the "pdiff" variable, it is perfect.</p>
  
  <p>i had total 5 columns and 10 rows. So now problem with rowindex and column index.</p>
  
  <p>and after this i have also refresh the table. but still it is not reflecting on table.</p>