Convert timestamp in milliseconds to string formatted time in Java

Question

I am trying to convert a long value  number of milliseconds elapsed from 1 1 1970 i e  Epoch  to time of format h m s ms   The long value I use as timestamp  I get from the field timestamp of a logging event from log4j     So far I ve tried the following and it fails      logEvent timeStamp   1000 60 60  TimeUnit MILLISECONDS toMinutes logEvent timeStamp    but I get incorrect value       1289375173771 for logEvent timeStamp 358159  for logEvent timeStamp   1000 60 60   21489586 for TimeUnit MILLISECONDS toMinutes logEvent timeStamp    How do I go about this

User · Answer

long millis   durationInMillis   1000  long second    durationInMillis   1000    60  long minute    durationInMillis    1000   60     60  long hour    durationInMillis    1000   60   60     24   String time   String format   02d  02d  02d  d   hour  minute  second  millis

User · Answer

Try this   Date date   new Date logEvent timeSTamp   DateFormat formatter   new SimpleDateFormat  HH mm ss SSS    formatter setTimeZone TimeZone getTimeZone  UTC     String dateFormatted   formatter format date     See SimpleDateFormat for a description of other format strings that the class accepts   See runnable example using input of 1200 ms

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I ll show you three ways to  a  get the minute field from a long value  and  b  print it using the Date format you want  One uses java util Calendar  another uses Joda-Time  and the last uses the java time framework built into Java 8 and later    The java time framework supplants the old bundled date-time classes  and is inspired by Joda-Time  defined by JSR 310  and extended by the ThreeTen-Extra project   The java time framework is the way to go when using Java 8 and later  Otherwise  such as Android  use Joda-Time  The java util Date  Calendar classes are notoriously troublesome and should be avoided   java util Date  amp   Calendar  final long timestamp   new Date   getTime        with java util Date Calendar api final Calendar cal   Calendar getInstance    cal setTimeInMillis timestamp      here s how to get the minutes final int minutes   cal get Calendar MINUTE      and here s how to get the String representation final String timeString       new SimpleDateFormat  HH mm ss SSS   format cal getTime     System out println minutes   System out println timeString     Joda-Time     with JodaTime 2 4 final DateTime dt   new DateTime timestamp      here s how to get the minutes final int minutes2   dt getMinuteOfHour       and here s how to get the String representation final String timeString2   dt toString  HH mm ss SSS    System out println minutes2   System out println timeString2     Output      24   09 24 10 254   24   09 24 10 254   java time  long millisecondsSinceEpoch   1289375173771L  Instant instant   Instant ofEpochMilli   millisecondsSinceEpoch    ZonedDateTime zdt   ZonedDateTime ofInstant   instant   ZoneOffset UTC     DateTimeFormatter formatter   DateTimeFormatter ofPattern    HH mm ss SSS     String output   formatter format   zdt     System out println    millisecondsSinceEpoch      millisecondsSinceEpoch     instant      instant     output      output         millisecondsSinceEpoch  1289375173771 instant  2010-11-10T07 46 13 771Z output  07 46 13 771

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public static String timeDifference long timeDifference1    long timeDifference   timeDifference1 1000  int h    int   timeDifference    3600    int m    int    timeDifference -  h   3600     60   int s    int   timeDifference -  h   3600  - m   60    return String format   02d  02d  02d   h m s

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long hours   TimeUnit MILLISECONDS toHours timeInMilliseconds       long minutes   TimeUnit MILLISECONDS toMinutes timeInMilliseconds - TimeUnit HOURS toMillis hours        long seconds   TimeUnit MILLISECONDS              toSeconds timeInMilliseconds - TimeUnit HOURS toMillis hours  - TimeUnit MINUTES toMillis minutes        long milliseconds   timeInMilliseconds - TimeUnit HOURS toMillis hours              - TimeUnit MINUTES toMillis minutes  - TimeUnit SECONDS toMillis seconds       return String format   02d  02d  02d  d   hours  minutes  seconds  milliseconds

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Try this       String sMillis    10997195233       double dMillis   0       int days   0      int hours   0      int minutes   0      int seconds   0      int millis   0       String sTime       try           dMillis   Double parseDouble sMillis         catch  Exception e            System out println e getMessage                 seconds    int  dMillis   1000    60      millis    int  dMillis   1000        if  seconds  gt  0            minutes    int  dMillis   1000   60    60          if  minutes  gt  0                hours    int  dMillis   1000   60   60    24              if  hours  gt  0                    days    int  dMillis   1000   60   60   24                   if  days  gt  0                        sTime   days     days     hours     hours     minutes     min     seconds     sec     millis     millisec                     else                       sTime   hours     hours     minutes     min     seconds     sec     millis     millisec                                   else                   sTime   minutes     min     seconds     sec     millis     millisec                           else               sTime   seconds     sec     millis     millisec                   else           sTime   dMillis     millisec              System out println  time      sTime

User · Answer

It is possible to use apache commons  commons-lang3  and its DurationFormatUtils class    lt dependency gt     lt groupId gt org apache commons lt  groupId gt     lt artifactId gt commons-lang3 lt  artifactId gt     lt version gt 3 1 lt  version gt   lt  dependency gt    For example   String formattedDuration   DurationFormatUtils formatDurationHMS 12313152      formattedDuration value is  3 25 13 152  String otherFormattedDuration   DurationFormatUtils formatDuration 12313152  DurationFormatUtils ISO EXTENDED FORMAT PATTERN      otherFormattedDuration value is  P0000Y0M0DT3H25M13 152S    Hope it can help

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Doing  logEvent timeStamp    1000 60 60    will give you hours  not minutes  Try   logEvent timeStamp    1000 60    and you will end up with the same answer as  TimeUnit MILLISECONDS toMinutes logEvent timeStamp

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long second   TimeUnit MILLISECONDS toSeconds millis   long minute   TimeUnit MILLISECONDS toMinutes millis   long hour   TimeUnit MILLISECONDS toHours millis   millis -  TimeUnit SECONDS toMillis second   return String format   02d  02d  02d  d   hour  minute  second  millis

[java] Convert timestamp in milliseconds to string formatted time in Java

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