How to get the days between dates in Java

//gets the number of days between two dates  
 private int daysbetween (date now, date returndate) {Calendar Cnow = calendar.getinstance ();  Calendar creturndate = Calendar.getinstance ();  Cnow.settime (now);  Creturndate.settime (returndate);  Settimetomidnight (Cnow);  Settimetomidnight (creturndate);  Long todayms = Cnow.gettimeinmillis ();  Long Returnms = Creturndate.gettimeinmillis ();  Long Intervalms = TODAYMS-RETURNMS; Return Millisecondstodays (Intervalms);}  
 //get the number of minutes between two dates  private int Millisecondstodays (Long Intervalms) {return (int) (Intervalms/(86400));}  
 //gets the number of milliseconds between two dates  private void  Settimetomidnight (Calendar calendar) {Calendar.set (calendar.hour_of_day, 0);  Calendar.set (calendar.minute, 0); Calendar.set (Calendar.second, 0);}  

Java gets the number of days between dates