How to convert Milliseconds to X mins x seconds in Java

Question

I want to record the time using System currentTimeMillis   when a user begins something in my program  When he finishes  I will subtract the current System currentTimeMillis   from the start variable  and I want to show them the time elapsed using a human readable format such as  XX hours  XX mins  XX seconds  or even  XX mins  XX seconds  because its not likely to take someone an hour   What s the best way to do this

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Revisiting  brent-nash contribution  we could use modulus function instead of subtractions and use String format method for the result string              Convert a millisecond duration to a string format             param millis A duration to convert to a string form       return A string of the form  X Days Y Hours Z Minutes A Seconds B Milliseconds            public static String getDurationBreakdown long millis           if  millis  lt  0              throw new IllegalArgumentException  Duration must be greater than zero                      long days   TimeUnit MILLISECONDS toDays millis          long hours   TimeUnit MILLISECONDS toHours millis    24         long minutes   TimeUnit MILLISECONDS toMinutes millis    60         long seconds   TimeUnit MILLISECONDS toSeconds millis    60         long milliseconds   millis   1000          return String format   d Days  d Hours  d Minutes  d Seconds  d Milliseconds                               days  hours  minutes  seconds  milliseconds

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This answer is similar to some answers above  However  I feel that it would be beneficial because  unlike other answers  this will remove any extra commas or whitespace and handles abbreviation          Converts milliseconds to  x days  x hours  x mins  x secs          param millis               The milliseconds     param longFormat                 code true  to use  seconds  and  minutes  instead of  secs  and  mins      return A string representing how long in days hours minutes seconds millis is      public static String millisToString long millis  boolean longFormat        if  millis  lt  1000            return String format  0  s   longFormat    seconds     secs              String   units                  day    hour   longFormat    minute     min   longFormat    second     sec             long   times   new long 4       times 0    TimeUnit DAYS convert millis  TimeUnit MILLISECONDS       millis -  TimeUnit MILLISECONDS convert times 0   TimeUnit DAYS       times 1    TimeUnit HOURS convert millis  TimeUnit MILLISECONDS       millis -  TimeUnit MILLISECONDS convert times 1   TimeUnit HOURS       times 2    TimeUnit MINUTES convert millis  TimeUnit MILLISECONDS       millis -  TimeUnit MILLISECONDS convert times 2   TimeUnit MINUTES       times 3    TimeUnit SECONDS convert millis  TimeUnit MILLISECONDS       StringBuilder s   new StringBuilder        for  int i   0  i  lt  4  i              if  times i   gt  0                s append String format   d  s s     times i   units i   times i     1         s                         return s toString   substring 0  s length   - 2             Converts milliseconds to  x days  x hours  x mins  x secs          param millis               The milliseconds     return A string representing how long in days hours mins secs millis is      public static String millisToString long millis        return millisToString millis  false

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Here is an answer based on Brent Nash answer  Hope that helps    public static String getDurationBreakdown long millis        String   units      Days      Hours      Minutes      Seconds         Long   values   new Long units length       if millis  lt  0                throw new IllegalArgumentException  Duration must be greater than zero                values 0    TimeUnit MILLISECONDS toDays millis       millis -  TimeUnit DAYS toMillis values 0        values 1    TimeUnit MILLISECONDS toHours millis       millis -  TimeUnit HOURS toMillis values 1        values 2    TimeUnit MILLISECONDS toMinutes millis       millis -  TimeUnit MINUTES toMillis values 2        values 3    TimeUnit MILLISECONDS toSeconds millis        StringBuilder sb   new StringBuilder 64       boolean startPrinting   false      for int i   0  i  lt  units length  i             if   startPrinting  amp  amp  values i     0              startPrinting   true          if startPrinting               sb append values i                sb append units i                         return sb toString

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Using the java time package in Java 8   Instant start   Instant now    Thread sleep 63553   Instant end   Instant now    System out println Duration between start  end      Output is in ISO 8601 Duration format  PT1M3 553S  1 minute and 3 553 seconds

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I modified  MyKuLLSKI  s answer and added plurlization support  I took out seconds because I didn t need them  though feel free to re-add it if you need it   public static String intervalToHumanReadableTime int intervalMins         if intervalMins  lt   0            return  0         else            long intervalMs   intervalMins   60   1000           long days   TimeUnit MILLISECONDS toDays intervalMs           intervalMs -  TimeUnit DAYS toMillis days           long hours   TimeUnit MILLISECONDS toHours intervalMs           intervalMs -  TimeUnit HOURS toMillis hours           long minutes   TimeUnit MILLISECONDS toMinutes intervalMs            StringBuilder sb   new StringBuilder 12            if  days  gt   1                sb append days  append   day   append pluralize days   append                           if  hours  gt   1                sb append hours  append   hour   append pluralize hours   append                           if  minutes  gt   1                sb append minutes  append   minute   append pluralize minutes              else               sb delete sb length  -2  sb length  -1                      return sb toString                          public static String pluralize long val        return  Math round val   gt  1    s

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for Android below API 9   String format   d hr  d min   d sec   millis  1000 60 60    millis  1000 60 60    1000 60     millis  1000 60 60    1000 60   1000

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I would not pull in the extra dependency just for that  division is not that hard  after all   but if you are using Commons Lang anyway  there are the DurationFormatUtils   Example Usage  adapted from here    import org apache commons lang3 time DurationFormatUtils  public String getAge long value        long currentTime   System currentTimeMillis        long age   currentTime - value      String ageString   DurationFormatUtils formatDuration age   d      d       if   0d  equals ageString             ageString   DurationFormatUtils formatDuration age   H      h           if   0h  equals ageString                 ageString   DurationFormatUtils formatDuration age   m      m               if   0m  equals ageString                     ageString   DurationFormatUtils formatDuration age   s      s                   if   0s  equals ageString                         ageString   age    ms                                                       return ageString         Example   long lastTime   System currentTimeMillis   - 2000  System out println  Elapsed time      getAge lastTime        Output  2s   Note  To get millis from two LocalDateTime objects you can use   long age   ChronoUnit MILLIS between initTime  LocalDateTime now

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For small times  less than an hour  I prefer     long millis        System out printf   1 TM  1 TS   millis      or String str   String format   1 TM  1 TS   millis     for longer intervalls     private static final long HOUR   TimeUnit HOURS toMillis 1       if  millis  lt  HOUR        System out printf   1 TM  1 TS n   millis     else       System out printf   d  2 TM  2 TS n   millis   HOUR  millis   HOUR

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long startTime   System currentTimeMillis           do your work        long endTime System currentTimeMillis        long diff endTime-startTime             long hours TimeUnit MILLISECONDS toHours diff       diff diff- hours 60 60 1000       long min TimeUnit MILLISECONDS toMinutes diff       diff diff- min 60 1000       long seconds TimeUnit MILLISECONDS toSeconds diff         hour  min and seconds variables contains the time elapsed on your work

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Use the java util concurrent TimeUnit class   String format   d min   d sec        TimeUnit MILLISECONDS toMinutes millis       TimeUnit MILLISECONDS toSeconds millis  -      TimeUnit MINUTES toSeconds TimeUnit MILLISECONDS toMinutes millis        Note  TimeUnit is part of the Java 1 5 specification  but toMinutes was added as of Java 1 6   To add a leading zero for values 0-9  just do   String format   02d min   02d sec        TimeUnit MILLISECONDS toMinutes millis       TimeUnit MILLISECONDS toSeconds millis  -      TimeUnit MINUTES toSeconds TimeUnit MILLISECONDS toMinutes millis        If TimeUnit or toMinutes are unsupported  such as on Android before API version 9   use the following equations   int seconds    int   milliseconds   1000    60   int minutes    int    milliseconds    1000 60     60   int hours      int    milliseconds    1000 60 60     24     etc

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Just to add more info if you want to format like   HH mm ss  0  lt   HH  lt   infinite  0  lt   mm  lt  60  0  lt   ss  lt  60  use this   int h    int    startTimeInMillis   1000    3600   int m    int     startTimeInMillis   1000    60    60   int s    int    startTimeInMillis   1000    60     I just had this issue now and figured this out

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Based on  siddhadev s answer  I wrote a function which converts milliseconds to a formatted string                 Convert a millisecond duration to a string format                 param millis A duration to convert to a string form         return A string of the form  X Days Y Hours Z Minutes A Seconds               public static String getDurationBreakdown long millis            if millis  lt  0                throw new IllegalArgumentException  Duration must be greater than zero                        long days   TimeUnit MILLISECONDS toDays millis           millis -  TimeUnit DAYS toMillis days           long hours   TimeUnit MILLISECONDS toHours millis           millis -  TimeUnit HOURS toMillis hours           long minutes   TimeUnit MILLISECONDS toMinutes millis           millis -  TimeUnit MINUTES toMillis minutes           long seconds   TimeUnit MILLISECONDS toSeconds millis            StringBuilder sb   new StringBuilder 64           sb append days           sb append   Days             sb append hours           sb append   Hours             sb append minutes           sb append   Minutes             sb append seconds           sb append   Seconds             return sb toString

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DurationFormatUtils formatDurationHMS long

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Use java util concurrent TimeUnit  and use this simple method   private static long timeDiff Date date  Date date2  TimeUnit unit        long milliDiff date2 getTime  -date getTime        long unitDiff   unit convert milliDiff  TimeUnit MILLISECONDS       return unitDiff       For example   SimpleDateFormat sdf   new SimpleDateFormat  yy MM dd HH mm ss      Date firstDate   sdf parse  06 24 2017 04 30 00    Date secondDate   sdf parse  07 24 2017 05 00 15    Date thirdDate   sdf parse  06 24 2017 06 00 15     System out println  days difference    timeDiff firstDate secondDate TimeUnit DAYS    System out println  hours difference    timeDiff firstDate thirdDate TimeUnit HOURS    System out println  minutes difference    timeDiff firstDate thirdDate TimeUnit MINUTES    System out println  seconds difference    timeDiff firstDate thirdDate TimeUnit SECONDS

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long time   1536259   return  new SimpleDateFormat  mm ss SSS    format new Date time      Prints      25 36 259

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I think the best way is   String format   d min   d sec        TimeUnit MILLISECONDS toSeconds length  60      TimeUnit MILLISECONDS toSeconds length    60

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This is easier in Java 9       Duration elapsedTime   Duration ofMillis millisDiff        String humanReadableElapsedTime   String format                d hours   d mins   d seconds               elapsedTime toHours                elapsedTime toMinutesPart                elapsedTime toSecondsPart       This produces a string like 0 hours  39 mins  9 seconds   If you want to round to whole seconds before formatting       elapsedTime   elapsedTime plusMillis 500  truncatedTo ChronoUnit SECONDS     To leave out the hours if they are 0       long hours   elapsedTime toHours        String humanReadableElapsedTime      if  hours    0            humanReadableElapsedTime   String format                    d mins   d seconds                   elapsedTime toMinutesPart                    elapsedTime toSecondsPart            else           humanReadableElapsedTime   String format                    d hours   d mins   d seconds                   hours                  elapsedTime toMinutesPart                    elapsedTime toSecondsPart             Now we can have for example 39 mins  9 seconds   To print minutes and seconds with leading zero to make them always two digits  just insert 02 into the relevant format specifiers  thus       String humanReadableElapsedTime   String format                d hours   02d mins   02d seconds               elapsedTime toHours                elapsedTime toMinutesPart                elapsedTime toSecondsPart       Now we can have for example 0 hours  39 mins  09 seconds

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Uhm    how many milliseconds are in a second  And in a minute  Division is not that hard   int seconds    int    milliseconds   1000    60   int minutes    int    milliseconds   1000    60     Continue like that for hours  days  weeks  months  year  decades  whatever

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Shortest solution   Here s probably the shortest which also deals with time zones   System out printf   tT   millis-TimeZone getDefault   getRawOffset       Which outputs for example   00 18 32   Explanation    tT is the time formatted for the 24-hour clock as  tH  tM  tS    tT also accepts longs as input  so no need to create a Date  printf   will simply print the time specified in milliseconds  but in the current time zone therefore we have to subtract the raw offset of the current time zone so that 0 milliseconds will be 0 hours and not the time offset value of the current time zone   Note  1  If you need the result as a String  you can get it like this   String t   String format   tT   millis-TimeZone getDefault   getRawOffset       Note  2  This only gives correct result if millis is less than a day because the day part is not included in the output

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For those who looking for Kotlin code  fun converter millis  Long   String           String format               quot  02d    02d    02d quot               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                           Sample output  09   10   26

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I have covered this in another answer but you can do  public static Map lt TimeUnit Long gt  computeDiff Date date1  Date date2        long diffInMillies   date2 getTime   - date1 getTime        List lt TimeUnit gt  units   new ArrayList lt TimeUnit gt  EnumSet allOf TimeUnit class        Collections reverse units       Map lt TimeUnit Long gt  result   new LinkedHashMap lt TimeUnit Long gt         long milliesRest   diffInMillies      for   TimeUnit unit   units             long diff   unit convert milliesRest TimeUnit MILLISECONDS           long diffInMilliesForUnit   unit toMillis diff           milliesRest   milliesRest - diffInMilliesForUnit          result put unit diff             return result     The output is something like Map  DAYS 1  HOURS 3  MINUTES 46  SECONDS 40  MILLISECONDS 0  MICROSECONDS 0  NANOSECONDS 0   with the units ordered  It s up to you to figure out how to internationalize this data according to the target locale

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If you know the time difference would be less than an hour  then you can use following code       Calendar c1   Calendar getInstance        Calendar c2   Calendar getInstance         c2 add Calendar MINUTE  51        long diff   c2 getTimeInMillis   - c1 getTimeInMillis         c2 set Calendar MINUTE  0       c2 set Calendar HOUR  0       c2 set Calendar SECOND  0        DateFormat df   new SimpleDateFormat  mm ss        long diff1   c2 getTimeInMillis     diff      System out println df format new Date diff1       It will result to  51 00

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Joda-Time  Using Joda-Time   DateTime startTime   new DateTime        do something  DateTime endTime   new DateTime    Duration duration   new Duration startTime  endTime   Period period   duration toPeriod   normalizedStandard PeriodType time     System out println PeriodFormat getDefault   print period

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My simple calculation   String millisecToTime int millisec        int sec   millisec 1000      int second   sec   60      int minute   sec   60      if  minute  gt   60            int hour   minute   60          minute    60          return hour          minute  lt  10    0    minute   minute           second  lt  10    0    second   second             return minute          second  lt  10    0    second   second       Happy coding

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Either hand divisions  or use the SimpleDateFormat API   long start   System currentTimeMillis       do your work    long elapsed   System currentTimeMillis   - start  DateFormat df   new SimpleDateFormat  HH  hours   mm  mins   ss  seconds     df setTimeZone TimeZone getTimeZone  GMT 0     System out println df format new Date elapsed       Edit by Bombe  It has been shown in the comments that this approach only works for smaller durations  i e  less than a day

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There is a problem  When milliseconds is 59999  actually it is 1 minute but it will be computed as 59 seconds and 999 milliseconds is lost   Here is a modified version based on previous answers  which can solve this loss   public static String formatTime long millis        long seconds   Math round  double  millis   1000       long hours   TimeUnit SECONDS toHours seconds       if  hours  gt  0          seconds -  TimeUnit HOURS toSeconds hours       long minutes   seconds  gt  0   TimeUnit SECONDS toMinutes seconds    0      if  minutes  gt  0          seconds -  TimeUnit MINUTES toSeconds minutes       return hours  gt  0   String format   02d  02d  02d   hours  minutes  seconds    String format   02d  02d   minutes  seconds

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for correct strings   1hour  3sec    3 min  but not  0 hour  0 min  3 sec   i write this code   int seconds    int  millis   1000    60   int minutes    int   millis    1000 60     60   int hours    int   millis    1000 60 60     24   int days    int   millis    1000 60 60 24     365   int years    int  millis   1000 60 60 24 365    ArrayList lt String gt  timeArray   new ArrayList lt String gt      if years  gt  0         timeArray add String valueOf years       y     if days  gt  0          timeArray add String valueOf days     d     if hours gt 0         timeArray add String valueOf hours     h     if minutes gt 0       timeArray add String valueOf minutes     min     if seconds gt 0       timeArray add String valueOf seconds     sec     String time       for  int i   0  i  lt  timeArray size    i           time   time   timeArray get i       if  i    timeArray size   - 1          time   time            if  time          time    0 sec

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Firstly  System currentTimeMillis   and Instant now   are not ideal for timing  They both report the wall-clock time  which the computer doesn t know precisely  and which can move erratically  including going backwards if for example the NTP daemon corrects the system time  If your timing happens on a single machine then you should instead use System nanoTime     Secondly  from Java 8 onwards java time Duration is the best way to represent a duration   long start   System nanoTime       do things    long end   System nanoTime    Duration duration   Duration ofNanos end - start   System out println duration      Prints  PT18M19 511627776S  System out printf   d Hours  d Minutes  d Seconds n           duration toHours    duration toMinutes     60  duration getSeconds     60      prints  0 Hours 18 Minutes 19 Seconds

[java] How to convert Milliseconds to "X mins, x seconds" in Java?

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