title: Excel Drop down list using Apache POI
body: <p>I need to create a drop down list in excel file using Apache POI. and I am able to do that so But 
  I am not able to make first item in drop down list as default Item.</p>
  
  <pre class="lang-java prettyprint-override"><code>public class sd {
  
  /**
   * @param args
   * @throws IOException 
   */
  public static void main(String[] args) throws IOException {
  
  DataValidation dataValidation = null;
  DataValidationConstraint constraint = null;
  DataValidationHelper validationHelper = null;
  
   XSSFWorkbook wb = new XSSFWorkbook();
   XSSFSheet sheet1=(XSSFSheet) wb.createSheet("sheet1");
  
  
      validationHelper=new XSSFDataValidationHelper(sheet1);
      CellRangeAddressList addressList = new  CellRangeAddressList(0,5,0,0);
      constraint =validationHelper.createExplicitListConstraint(new String[]{"SELECT","10", "20", "30"});
      dataValidation = validationHelper.createValidation(constraint, addressList);
      dataValidation.setSuppressDropDownArrow(true);      
      sheet1.addValidationData(dataValidation);
  
      FileOutputStream fileOut = new FileOutputStream("c:\\temp\\vineet.xlsx");
      wb.write(fileOut);
      fileOut.close();
  }
  
  }
  </code></pre>