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How to display in HH:MM:SS... ?

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  How to display in HH:MM:SS... ? abhilash.androiddeveloper@gmail.com - 2013-10-10 10:58 -0700
    Re: How to display in HH:MM:SS... ? Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2013-10-13 09:57 +0200
    Re: How to display in HH:MM:SS... ? Arne Vajhøj <arne@vajhoej.dk> - 2013-10-19 22:23 -0400

#26295 — How to display in HH:MM:SS... ?

Hi,

I am having two dates with times for example:

                String dateStart = "01/14/2012 09:30:55";
		String dateStop = "01/15/2012 18:25:54";

SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
	 
		Date d1 = null;
		Date d2 = null;
	 
			d1 = format.parse(dateStart);
			d2 = format.parse(dateStop);

When I subtract:  d2 - d1, I want to show the ela[sed time in between the above two dates in the format in HH:MM:SS: like i want the output something like: 
33:05:01. How can I get in that format..? If anybody is having any idea please help me out... 

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#26319

On 2013-10-10 19:58, abhilash.androiddeveloper@gmail.com allegedly wrote:
> Hi,
> 
> I am having two dates with times for example:
> 
>                 String dateStart = "01/14/2012 09:30:55";
> 		String dateStop = "01/15/2012 18:25:54";
> 
> SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
> 	 
> 		Date d1 = null;
> 		Date d2 = null;
> 	 
> 			d1 = format.parse(dateStart);
> 			d2 = format.parse(dateStop);
> 
> When I subtract:  d2 - d1, I want to show the ela[sed time in between the above two dates in the format in HH:MM:SS: like i want the output something like: 
> 33:05:01. How can I get in that format..? If anybody is having any idea please help me out... 
> 

public static String computeDiffTimeAsString( Date d1, Date d2 ){
  if( d1.after( d2 ) ) throw new IllegalArgumentException(
String.format( "Start date %tc is after end date %tc", d1, d2 ) );

  long secs = (d2.getTime() - d1.getTime()) / 1000;
  return String.format( "%2d:%2d:%2d", secs / 3600, secs % 3600 / 60,
secs % 60 );
}

(Caveat: neither compiled nor tested)

-- 
DF.

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#26385

On 10/10/2013 1:58 PM, abhilash.androiddeveloper@gmail.com wrote:
> I am having two dates with times for example:
>
>                  String dateStart = "01/14/2012 09:30:55";
> 		String dateStop = "01/15/2012 18:25:54";
>
> SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
> 	
> 		Date d1 = null;
> 		Date d2 = null;
> 	
> 			d1 = format.parse(dateStart);
> 			d2 = format.parse(dateStop);
>
> When I subtract:  d2 - d1, I want to show the ela[sed time in between the above two dates in the format in HH:MM:SS: like i want the output something like:
> 33:05:01. How can I get in that format..? If anybody is having any idea please help me out...

There are several ways.

Demo:

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.Duration;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
import java.util.Date;
import java.util.TimeZone;

import org.apache.commons.lang3.time.DurationFormatUtils;

public class TimeSub {
     private static final int MS_PER_D = 24 * 60 * 60 * 1000;
     private static final int MS_PER_H = 60 * 60 * 1000;
     private static final int MS_PER_M = 60 * 1000;
     private static final int MS_PER_S = 1000;
     public static String theDIYWay(Date d1, Date d2) {
         long delta = d2.getTime() - d1.getTime();
         long h = delta / MS_PER_H;
         long m = (delta % MS_PER_H) / MS_PER_M;
         long s = (delta % MS_PER_M) / MS_PER_S;
         return String.format("%02d:%02d:%02d",  h, m , s);
     }
     public static String theHackishWay(Date d1, Date d2) {
         long delta = d2.getTime() - d1.getTime();
         if(delta >= MS_PER_D) throw new 
IllegalArgumentException("Period not less than 1 day");
         DateFormat format = new SimpleDateFormat("HH:mm:ss");
         format.setTimeZone(TimeZone.getTimeZone("UTC"));
         return format.format(new Date(delta));
     }
     public static String theJakartaWay(Date d1, Date d2) {
         long delta = d2.getTime() - d1.getTime();
         return DurationFormatUtils.formatDuration(delta, "HH:mm:ss");
     }
     public static String theJava8Way(LocalDateTime d1, LocalDateTime d2) {
         Duration dur = Duration.ofMillis(ChronoUnit.MILLIS.between(d1, 
d2));
         long delta = dur.toMillis();
         long h = delta / MS_PER_H;
         long m = (delta % MS_PER_H) / MS_PER_M;
         long s = (delta % MS_PER_M) / MS_PER_S;
         return String.format("%02d:%02d:%02d",  h, m , s);
     }
     public static void test(String dateStart, String dateStop) throws 
ParseException {
         DateFormat df = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
         Date start = df.parse(dateStart);
         Date stop = df.parse(dateStop);
         System.out.println(theDIYWay(start, stop));
         try {
             System.out.println(theHackishWay(start, stop));
         } catch(IllegalArgumentException ex) {
             System.out.println("**** Error ****");
         }
         System.out.println(theJakartaWay(start, stop));
         DateTimeFormatter df2 = DateTimeFormatter.ofPattern("MM/dd/yyyy 
HH:mm:ss");
         LocalDateTime start2 = df2.parse(dateStart, LocalDateTime::from);
         LocalDateTime stop2 = df2.parse(dateStop, LocalDateTime::from);
         System.out.println(theJava8Way(start2, stop2));
     }
     public static void main(String[] args) throws ParseException {
         test("01/14/2012 09:30:55", "01/14/2012 18:25:54");
         test("01/14/2012 09:30:55", "01/15/2012 18:25:54");
     }
}

Arne

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