title: Getting number of days difference between 2 dates
body: <p>I am using jxl api to read an excel file in android. When I get a date like "30/11/2012" from excel, the LabelCell output shows me date as "11/30/12".</p>
  
  <p>1) I need to get the output in dd/MM/yyyy format when reading the excel file, because it exists that way in excel, so I wouldn't want to unnecessarily convert it into another format. How to do that ?</p>
  
  <p>2) After reading in the excel column's date, I generate 2 variables, one which has excel date - 20 days (lets call it excelMinus20) and another excel date + 10 days (lets call it excelPlus10.
  Now, I would like to check going further, if the current system date (smartphone's date) >= excelMinus20 and current system date &lt;= excelPlus10.</p>
  
  <p>How to do this whole thing using java.text.Date ? I tried using joda time as well, but it's too complicated to use. Please guide me at least in the right direction.</p>
  
  <p>Thanks in advance
  Omkar Ghaisas</p>