Java tutorial
import java.text.SimpleDateFormat; import java.util.Calendar; /** * DateCalAdd -- compute the difference between two dates. */ public class DateCalAdd { public static void main(String[] av) { /** Today's date */ Calendar now = Calendar.getInstance(); /* Do "DateFormat" using "simple" format. */ SimpleDateFormat formatter = new SimpleDateFormat("E yyyy/MM/dd 'at' hh:mm:ss a zzz"); System.out.println("It is now " + formatter.format(now.getTime())); now.add(Calendar.YEAR, -2); System.out.println("Two years ago was " + formatter.format(now.getTime())); } }