Zeeshan Akhter

 

May - Oct 2006 Calendar

 

 

Finding the difference between two dates isn’t as straightforward as subtracting the two dates and dividing the result by /*(24 * 60 * 60 * 1000). Infact, its erroneous!

Going the ‘milliseconds way’ will lead to rounding off errors and they become most evident once you have a little thing like “Daylight Savings Time” come into the picture.

The Correct Way:

 

/** Using Calendar – THE CORRECT WAY**/
//assert: startDate must be before endDate
public static long daysBetween(Calendar startDate, Calendar endDate) {
Calendar date = (Calendar) startDate.clone();
long daysBetween = 0;
while (date.before(endDate)) {
date.add(Calendar.DAY_OF_MONTH, 1);
daysBetween++;
}
return daysBetween;
}
}

 

 

 

 

 

or more efficiently,   if you’re using the Gregorian Calendar:

 

/** Using Calendar – THE CORRECT (& Faster) WAY**/
/****Needs testing …… Anyone?****/
//assert: startDate must be before endDate
public static long daysBetween(final Calendar…

View original post 371 more words

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About Mallik

I born in Good cultural place called India. My family is traditional family. We fallow all Indian traditions.

Posted on October 3, 2012, in About All. Bookmark the permalink. Leave a comment.

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