How to convert milliseconds to “hh:mm:ss” format?

Question

I'm confused. After stumbling upon this thread, I tried to figure out how to format a countdown timer that had the format hh:mm:ss.

Here's my attempt -

//hh:mm:ss
String.format("%02d:%02d:%02d", 
    TimeUnit.MILLISECONDS.toHours(millis),
    TimeUnit.MILLISECONDS.toMinutes(millis) - 
    TimeUnit.MINUTES.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)),
    TimeUnit.MILLISECONDS.toSeconds(millis) - 
    TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis)));   

So, when I try a value like 3600000ms, I get 01:59:00, which is wrong since it should be 01:00:00. Obviously there's something wrong with my logic, but at the moment, I cannot see what it is!

Can anyone help?

Edit -

Fixed it. Here's the right way to format milliseconds to hh:mm:ss format -

//hh:mm:ss
String.format("%02d:%02d:%02d", 
    TimeUnit.MILLISECONDS.toHours(millis),
    TimeUnit.MILLISECONDS.toMinutes(millis) - 
    TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)),
    TimeUnit.MILLISECONDS.toSeconds(millis) - 
    TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis))));

The problem was this TimeUnit.MINUTES.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)). It should have been this TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)) instead.

Answer 1

// New date object from millis
Date date = new Date(millis);
// formattter 
SimpleDateFormat formatter= new SimpleDateFormat("HH:mm:ss.SSS");
formatter.setTimeZone(TimeZone.getTimeZone("UTC"));
// Pass date object
String formatted = formatter.format(date );

See runnable example using input of 1200 ms.

Answer 2

Well, you could try something like this, :

public String getElapsedTimeHoursMinutesSecondsString() {       
     long elapsedTime = getElapsedTime();  
     String format = String.format("%%0%dd", 2);  
     elapsedTime = elapsedTime / 1000;  
     String seconds = String.format(format, elapsedTime % 60);  
     String minutes = String.format(format, (elapsedTime % 3600) / 60);  
     String hours = String.format(format, elapsedTime / 3600);  
     String time =  hours + ":" + minutes + ":" + seconds;  
     return time;  
 }  

to convert milliseconds to a time value

Answer 3

The answer marked as correct has a little mistake,

String myTime = String.format("%02d:%02d:%02d",
            TimeUnit.MILLISECONDS.toHours(millis),
            TimeUnit.MILLISECONDS.toMinutes(millis) -
                    TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)), // The change is in this line
            TimeUnit.MILLISECONDS.toSeconds(millis) -
                    TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis)));

for example this is an example of the value that i get:

417474:44:19

This is the solution to get the right format is:

String myTime =  String.format("%02d:%02d:%02d",
                //Hours
                TimeUnit.MILLISECONDS.toHours(millis) -
                        TimeUnit.DAYS.toHours(TimeUnit.MILLISECONDS.toDays(millis)),
                //Minutes
                TimeUnit.MILLISECONDS.toMinutes(millis) -
                        TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)),
                //Seconds
                TimeUnit.MILLISECONDS.toSeconds(millis) -
                        TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis)));

getting as a result a correct format:

18:44:19

---

other option to get the format hh:mm:ss is just :

   Date myDate = new Date(timeinMillis);
   SimpleDateFormat formatter = new SimpleDateFormat("HH:mm:ss");
   String myTime = formatter.format(myDate);

Answer 4

The generic method for this is fairly simple:

public static String convertSecondsToHMmSs(long seconds) {
    long s = seconds % 60;
    long m = (seconds / 60) % 60;
    long h = (seconds / (60 * 60)) % 24;
    return String.format("%d:%02d:%02d", h,m,s);
}

Answer 5

 public String millsToDateFormat(long mills) {

    Date date = new Date(mills);
    DateFormat formatter = new SimpleDateFormat("HH:mm:ss");
    String dateFormatted = formatter.format(date);
    return dateFormatted; //note that it will give you the time in GMT+0
}