title: Get Cell by a Cell reference letter identifier with Apache POI
body: <p>I am trying to get the Cell from the Row by a Cell reference and I have a problem. For example I have:</p>
  
  <pre><code>row.getCell(CellReference.convertColStringToIndex("B"));
  </code></pre>
  
  <p>That works fine if the Column index is <code>1</code>, but if Column was deleted so the <code>B</code> Column index became <code>2</code> and the method: <code>CellReference.convertColStringToIndex("B")</code> is still converting it to <code>1</code> in which case I can't get my Column, I am getting <code>null</code>.</p>
  
  <p>So the question is how can I get the Column from the Row depending on Cell identifier which is a letter?</p>