Java Examples - Add time to Date

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Problem Description

How to add time(Days, years, seconds) to Date ?

Solution

The following examples shows us how to add time to a date using add() method of Calender.

import java.util.*;

public class Main {
   public static void main(String[] args) throws Exception {
      Date d1 = new Date();
      Calendar cl = Calendar. getInstance();
      cl.setTime(d1);
      System.out.println("today is " + d1.toString());
      cl. add(Calendar.MONTH, 1);
      System.out.println("date after a month will be " + cl.getTime().toString() );
      cl. add(Calendar.HOUR, 70);
      System.out.println("date after 7 hrs will be " + cl.getTime().toString() );
      cl. add(Calendar.YEAR, 3);
      System.out.println("date after 3 years will be " + cl.getTime().toString() );
   }
}

Result

The above code sample will produce the following result.

today is Mon Jun 22 02:47:02 IST 2009
date after a month will be Wed Jul 22 02:47:02 IST 2009
date after 7 hrs will be Wed Jul 22 09:47:02 IST 2009
date after 3 years will be Sun Jul 22 09:47:02 IST 2012