title: Poi how to change cell type after changing style
body: <p>Im editing an xlsx file and Im trying to find some mistakes in numerical cells and make the bold. 
  the numbers are big for instance: 13882004729568</p>
  
  <p>After finding them and changing the font to bold (or changing foreground color) the cell type is changing to its default state and I get : b1.3882E+13
  even after trying to change the type to numerical.</p>
  
  <pre><code>XSSFFont italic = wb.createFont();
  italic.setFontName("Arial");
  italic.setItalic(true);
  CellStyle italicStyle = wb.createCellStyle();
  italicStyle.setFont(italic);
  cell.setCellStyle(italicStyle);
  cell.setCellType(XSSFCell.CELL_TYPE_NUMERIC);
  </code></pre>
  
  <p>Am I doing something wrong ?
  Is it other way to do this ?</p>