DateDiffExample.java

/*
1000 milliseconds = 1 second
60 seconds = 1 minute
60 minutes = 1 hour
24 hours = 1 day
*/

package com.jpt.dateExample;
 
import java.text.SimpleDateFormat;
import java.util.Date;
 
public class DateDiffExample {
 
	public static void main(String[] args) {
 
		String dateStart = "02/14/2015 09:29:58";
		String dateStop = "02/15/2015 10:31:48";
 
		//HH converts hour in 24 hours format (0-23), day calculation
		SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
 
		Date jd1 = null;
		Date jd2 = null;
 
		try {
			jd1 = format.parse(dateStart);
			jd2 = format.parse(dateStop);
 
			//in milliseconds
			long diff = jd2.getTime() - jd1.getTime();
 
			long diffSeconds = diff / 1000 % 60;
			long diffMinutes = diff / (60 * 1000) % 60;
			long diffHours = diff / (60 * 60 * 1000) % 24;
			long diffDays = diff / (24 * 60 * 60 * 1000);
 
			System.out.print(diffDays + " days, ");
			System.out.print(diffHours + " hours, ");
			System.out.print(diffMinutes + " minutes, ");
			System.out.print(diffSeconds + " seconds.");
 
		} catch (Exception e) {
			e.printStackTrace();
		}
 
	}
 
}