Date Utility - calc age, elapsed time...

Question

I need to calculate elapsed time between 2 dates, for example calc age based on DOB and Today. There must be a utility out there somewhere (free!). I'm sure I'm not the first one with this requirement.

Answer 1

try this
import java.util.*;
public class DateSub {
  public static void main(String [] args) {
    Calendar cal = Calendar.getInstance();
    cal.set (1970,0,1);
    long age = cal.getTime().getTime();
    age = System.currentTimeMillis() - age;
    System.out.println ("age = " + age + " milliseconds" );
    age /= 1000;
    System.out.println ("age = " + age + " seconds" );
    age /= (3600*24);
    System.out.println ("age = " + age + " days" );
    long years = age/(365);
    long days = age % 365;
    System.out.println ("age = " + years + " years " + days + " days");
}