XMLGregorianCalendar Representation for W3C XML Schema 1.0 date/time datatypes.

XMLGregorianCalendar
W3C Date and Time Formats

import java.util.GregorianCalendar;
import java.util.TimeZone;

import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;

public class Main {

 public static void main(String[] args)
     throws DatatypeConfigurationException {
   DatatypeFactory f = DatatypeFactory.newInstance();

   // GregorianCalendar -> XMLGregorianCalendar
   XMLGregorianCalendar c = f.newXMLGregorianCalendar(new GregorianCalendar());

   // XMLGregorianCalendar -> XML dateTime
   System.out.println(c.toXMLFormat());

   // XML dateTime -> XMLGregorianCalendar
   c = f.newXMLGregorianCalendar("2008-11-16T17:20:15.000+08:00");
   System.out.println("getYear(): " + c.getYear());

   c = f.newXMLGregorianCalendar();
   c.setYear(2009);
   c.setMonth(1);
   c.setDay(17);
   c.setTime(10, 15, 30);
   c.setMillisecond(0);
   TimeZone timezone = TimeZone.getDefault();
   c.setTimezone(timezone.getRawOffset() / 60000);
   System.out.println(c.toXMLFormat());
 }
}
/*
2009-01-17T13:06:59.828+08:00
getYear(): 2008
2009-01-17T10:15:30.000+08:00
*/