Quoting [EMAIL PROTECTED]:
>
> My favorite "Core Java" book proposes the "corejava.Day" class (see
> http://www.horstmann.com/corejava.html) which has
> int daysBetween(Day b)
> method. Tt calcurates the number of days between 2 dates, rather than
> "years". Do you want the number of years in fraction ( like 1.43234 years)?
>
this will get you the days:
/**
* @param d1 1st date
* @param d2 2nd date
* @returns number of days between dates d1 and d2 (abs; order is irrelevant)
**/
public static int daysBetween( Calendar d1 , Calendar d2 ){
long d1ms = d1.getTime().getTime();
long d2ms = d2.getTime().getTime();
long days = (d2ms-d1ms)/(long) StdUnits.MS_PER_DAY;
if (days < 0) days *= -1;
return (int) days;
}
where MS_PER_DAY is just 60*24*60*1000;
getting from days -> years consistently is harder because of leap
years/centuries. A crude approach is:
public static int yearsBetween( Calendar start , Calendar stop ){
int p = 0;
Calendar c = (Calendar) start.clone();
do{
c.add( Calendar.YEAR , 1 );
p++;
} while( c.before( stop ) );
return p;
}
hope this helps,
Graham
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