Adding a day to a java.util.date

[Giselle Dazzi]

Hi all,
how do I add dates in Java ? I guess I could do it via a GregorianCalendar object, but all I have is a java.util.date. I dont know how to turn it into a GregorianCalendar.
Can anyone help me ? either by turning a java.util.date into a Calendar object or by adding / subtracting days to a java.util.date
thx in advance

[Joe Ess]

I recall pain working with these two classes. Brute force solution:

 
Date aDate = new Date();
GregorianCalendar gc = new GregorianCalendar(aDate.getYear(), aDate.getMonth, aDate.getDay); 

[Giselle Dazzi]

Thanks, but ... those methods are deprecated...

[Chris De Vries]

How about something like this:

import java.util.*;
public class AddCals {
  public static void main(String[] args) {
    Calendar cal = Calendar.getInstance();
    // Set to March 15, 2003
    cal.set(2003,2,15);
    // Add one month to it
    cal.add(Calendar.MONTH,1);
    // Subtract two days
    cal.add(Calendar.DATE,-2);
    // You can get a Date object from the Calendar
    Date calDate = cal.getTime();
    // And display it
    System.out.println(calDate);
    System.exit(0);
  }
}

If you run that program, you should get April 13, 2003 and whatever the current time is as output. If you start with a Date object you can use the method Calendar.setTime(Date) method to set the Calendar object to the date represented by the Date object.
I hope this helps.
Chris

[Adrian Yan]

Giselle:
create an caledar object Calendar.getInstance(), and call its setTime(date) method, then calculate it however you want. That should resolve your problem.

[Giselle Dazzi]

Thanks everyone !