title: How to simply add more years into DatePicker in GWT and use the format to DD-MM-YYYY when a date was selected?
body: <p>Look at this code,</p>
  
  <pre><code>DateBox myDateBox=new DateBox();
  myDateBox.getDatePicker().setYearAndMonthDropdownVisible(true);
  DateTimeFormat dateFormat = DateTimeFormat.getFormat("DD-MM-YYYY");
  myDateBox.setFormat(new DateBox.DefaultFormat(dateFormat));
  </code></pre>
  
  <p>Ok, when I clicked on the DateBox the DatePicker got popped up but I could not see years like from 1600, so How to add more years into DatePicker?</p>
  
  <p>Alos, I want to use the format to DD-MM-YYYY when a date was selected but when clicked on a date nothing appeared in the DateBox?</p>