title: How to get the last column index reading excel file?
body: <p>How do i get the index of the last column when reading a <code>xlsx</code> file using the Apache POI API?</p>
  
  <p>There's a <code>getLastRowNum</code> method, but I can't find nothing related to the number of columns...</p>
  
  <p><br>
  EDIT:
  I'm dealing with <code>XLSX</code> files</p>