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

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Java 9      Duration timeLeft   Duration ofMillis 3600000       String hhmmss   String format   02d  02d  02d                timeLeft toHours    timeLeft toMinutesPart    timeLeft toSecondsPart         System out println hhmmss     This prints      01 00 00   You are doing right in letting library methods do the conversions involved for you  java time  the modern Java date and time API  or more precisely  its Duration class does it more elegantly and in a less error-prone way than TimeUnit   The toMinutesPart and toSecondsPart methods I used were introduced in Java 9   Java 6  7 and 8      long hours   timeLeft toHours        timeLeft   timeLeft minusHours hours       long minutes   timeLeft toMinutes        timeLeft   timeLeft minusMinutes minutes       long seconds   timeLeft toSeconds        String hhmmss   String format   02d  02d  02d   hours  minutes  seconds       System out println hhmmss     The output is the same as above   Question  How can that work in Java 6 and 7    In Java 8 and later and on newer Android devices  from API level 26  I   m told  java time comes built-in  In Java 6 and 7 get the ThreeTen Backport  the backport of the modern classes  ThreeTen for JSR 310  see the links at the bottom   On  older  Android use the Android edition of ThreeTen Backport  It   s called ThreeTenABP  And make sure you import the date and time classes from org threeten bp with subpackages    Links   Oracle tutorial  Date Time explaining how to use java time  Java Specification Request  JSR  310  where java time was first described  ThreeTen Backport project  the backport of java timeto Java 6 and 7  ThreeTen for JSR-310   ThreeTenABP  Android edition of ThreeTen Backport Question  How to use ThreeTenABP in Android Project  with a very thorough explanation

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String string   String format   02d  02d  02d  03d               TimeUnit MILLISECONDS toHours millisecend   TimeUnit MILLISECONDS toMinutes millisecend  - TimeUnit HOURS toMinutes TimeUnit MILLISECONDS toHours millisecend                TimeUnit MILLISECONDS toSeconds millisecend  - TimeUnit MINUTES toSeconds TimeUnit MILLISECONDS toMinutes millisecend    millisecend - TimeUnit SECONDS toMillis TimeUnit MILLISECONDS toSeconds millisecend       Format  00 00 00 000  Example  615605 Millisecend  00 10 15 605

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Going by Bohemian s answer we need need not use TimeUnit to find a known value  Much more optimal code would be  String hms   String format   02d  02d  02d   millisLeft  3600 1000                       millisLeft  60 1000    60                      millisLeft 1000   60     Hope it helps

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Test results for the 4 implementations  Having to do a lot of formatting for huge data  needed the best performance  so here are the  surprising  results   for  int i   0  i  lt  1000000  i          FUNCTION CALL    Durations    combinationFormatter  196 millis formatDuration  272 millis apacheFormat  754 millis formatTimeUnit  2216 millis  public static String apacheFormat long millis  throws ParseException       return DurationFormatUtils formatDuration millis   HH mm ss       public static String formatTimeUnit long millis  throws ParseException   String formatted   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         return formatted     public static String formatDuration final long millis        long seconds    millis   1000    60      long minutes    millis    1000   60     60      long hours   millis    1000   60   60        StringBuilder b   new StringBuilder        b append hours    0    00    hours  lt  10   String valueOf  0    hours         String valueOf hours        b append           b append minutes    0    00    minutes  lt  10   String valueOf  0    minutes             String valueOf minutes        b append           b append seconds    0    00    seconds  lt  10   String valueOf  0    seconds         String valueOf seconds        return b toString       public static String combinationFormatter final long millis        long seconds   TimeUnit MILLISECONDS toSeconds millis              - TimeUnit MINUTES toSeconds TimeUnit MILLISECONDS toMinutes millis        long minutes   TimeUnit MILLISECONDS toMinutes millis              - TimeUnit HOURS toMinutes TimeUnit MILLISECONDS toHours millis        long hours   TimeUnit MILLISECONDS toHours millis        StringBuilder b   new StringBuilder        b append hours    0    00    hours  lt  10   String valueOf  0    hours         String valueOf hours        b append           b append minutes    0    00    minutes  lt  10   String valueOf  0    minutes         String valueOf minutes            b append           b append seconds    0    00    seconds  lt  10   String valueOf  0    seconds         String valueOf seconds        return b toString

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I used this   String format   1 tH  1 tM  1 tS  1 tL   millis     See description of class Formatter   See runnable example using input of 2400 ms

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this worked for me  with kotlin  fun formatToDigitalClock miliSeconds  Long   String           val hours   TimeUnit MILLISECONDS toHours miliSeconds  toInt     24         val minutes   TimeUnit MILLISECONDS toMinutes miliSeconds  toInt     60         val seconds   TimeUnit MILLISECONDS toSeconds miliSeconds  toInt     60         return when               hours  gt  0 - gt  String format   d  02d  02d   hours  minutes  seconds              minutes  gt  0 - gt  String format   02d  02d   minutes  seconds              seconds  gt  0 - gt  String format  00  02d   seconds              else - gt                     00 00

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I tried as shown in the first answer  It works  but minus brought me into confusion  My answer by Groovy   import static java util concurrent TimeUnit         private static String formatElapsedTime long millis         int hrs   MILLISECONDS toHours millis    24     int min   MILLISECONDS toMinutes millis    60     int sec   MILLISECONDS toSeconds millis    60     int mls   millis   1000      sprintf    02d  02d  02d   03d     hrs  min  sec  mls

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You were really close   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          You were converting hours to millisseconds using minutes instead of hours   BTW  I like your use of the TimeUnit API     Here s some test code   public static void main String   args  throws ParseException       long millis   3600000      String hms   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         System out println hms       Output   01 00 00     I realised that my code above can be greatly simplified by using a modulus division instead of subtraction   String hms   String format   02d  02d  02d   TimeUnit MILLISECONDS toHours millis       TimeUnit MILLISECONDS toMinutes millis    TimeUnit HOURS toMinutes 1       TimeUnit MILLISECONDS toSeconds millis    TimeUnit MINUTES toSeconds 1      Still using the TimeUnit API for all magic values  and gives exactly the same output

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The code below does the conversion in both way   23 59 58 999 to 86398999  and than  86398999 to 23 59 58 999    import java util concurrent TimeUnit   public class TimeUtility        public static void main String   args             long currentDateTime   System currentTimeMillis             String strTest    23 59 58 999           System out println strTest            long l   strToMilli strTest           System out println l           l    1          String str   milliToString l           System out println str                         convert a time string into the equivalent long milliseconds                param strTime string fomratted as HH MM SS MSMS i e   23 59 59 999          return long integer like 86399999             public static long strToMilli String strTime            long retVal   0          String hour   strTime substring 0  2           String min   strTime substring 3  5           String sec   strTime substring 6  8           String milli   strTime substring 9  12           int h   Integer parseInt hour           int m   Integer parseInt min           int s   Integer parseInt sec           int ms   Integer parseInt milli            String strDebug   String format   02d  02d  02d  03d   h  m  s  ms             System out println strDebug           long lH   h   60   60   1000          long lM   m   60   1000          long lS   s   1000           retVal   lH   lM   lS   ms          return retVal                        convert time in milliseconds to the corresponding string  in case of day        rollover start from scratch 23 59 59 999   1   00 00 00 000                param millis the number of milliseconds corresponding to tim i e                       34137999 that can be obtained as follows                        lt p gt                       long lH   h   60   60   1000    hour to milli                       lt p gt                       long lM   m   60   1000     minute to milli                       lt p gt                       long lS   s   1000    seconds to milli                       lt p gt                       millis   lH   lM   lS   ms          return a string formatted as HH MM SS MSMS i e   23 59 59 999              private static String milliToString long millis             long hrs   TimeUnit MILLISECONDS toHours millis    24          long min   TimeUnit MILLISECONDS toMinutes millis    60          long sec   TimeUnit MILLISECONDS toSeconds millis    60            millis   millis -  hrs   60   60   1000     alternative way           millis   millis -  min   60   1000             millis   millis -  sec   1000             long mls   millis           long mls   millis   1000          String toRet   String format   02d  02d  02d  03d   hrs  min  sec  mls             System out println toRet           return toRet

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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

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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

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For Kotlin  val hours   String format   02d   TimeUnit MILLISECONDS toHours milSecs   val minutes   String format   02d                           TimeUnit MILLISECONDS toMinutes milSecs  - TimeUnit HOURS toMinutes TimeUnit MILLISECONDS toHours milSecs    val seconds   String format   02d                           TimeUnit MILLISECONDS toSeconds milSecs  - TimeUnit MINUTES toSeconds TimeUnit MILLISECONDS toMinutes milSecs      where  milSecs is milliseconds

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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

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If you are using apache commons   DurationFormatUtils formatDuration timeInMS   HH mm ss SSS

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DateFormat df   new SimpleDateFormat  HH mm ss    String formatted   df format aDateObject

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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

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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

[java] How to convert milliseconds to "hh:mm:ss" format?

Java 9

Java 6, 7 and 8

Question: How can that work in Java 6 and 7?

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