How to add minutes to my Date

Question

I have this date object   SimpleDateFormat df   new SimpleDateFormat  yyyy-mm-dd HH mm    Date d1   df parse interviewList get 37  getTime       value of d1 is Fri Jan 07 17 40 00 PKT 2011  Now I am trying to add 10 minutes to the date above   Calendar cal   Calendar getInstance    cal setTime d1   cal add Calendar MINUTE  10   String newTime   df format cal getTime       Value of newTime changes to 2011-50-07 17 50 but it should be 07-01-2011 17 50   It adds minutes correctly but it also changes month  don t know why

User · Answer

Just for anybody who is interested  I was working on an iOS project that required  similar functionality so I ended porting the answer by  jeznag to swift  private func addMinutesToDate minutes  Int  beforeDate  NSDate  - gt  NSDate       var SIXTY SECONDS   60      var m    Double   minutes   SIXTY SECONDS      var c    beforeDate timeIntervalSince1970    m     var newDate   NSDate timeIntervalSince1970  c       return newDate

User · Answer

Convenience method for implementing  Pangea s answer         Convenience method to add a specified number of minutes to a Date object    From  http   stackoverflow com questions 9043981 how-to-add-minutes-to-my-date     param  minutes  The number of minutes to add     param  beforeTime  The time that will have minutes added to it     return  A date object with the specified number of minutes added to it     private static Date addMinutesToDate int minutes  Date beforeTime       final long ONE MINUTE IN MILLIS   60000   millisecs      long curTimeInMs   beforeTime getTime        Date afterAddingMins   new Date curTimeInMs    minutes   ONE MINUTE IN MILLIS        return afterAddingMins

User · Answer

This is incorrectly specified   SimpleDateFormat df   new SimpleDateFormat  yyyy-mm-dd HH mm      You re using minutes instead of month  MM

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Can be done without the constants  like 3600000 ms is 1h   public static Date addMinutesToDate Date date  int minutes            Calendar calendar   Calendar getInstance            calendar setTime date           calendar add Calendar MINUTE  minutes           return calendar getTime           public static Date addHoursToDate Date date  int hours        Calendar calendar   Calendar getInstance        calendar setTime date       calendar add Calendar HOUR OF DAY  hours       return calendar getTime        example of usage    System out println new Date     System out println addMinutesToDate new Date    5     Tue May 26 16 16 14 CEST 2020 Tue May 26 16 21 14 CEST 2020

User · Answer

use this format   SimpleDateFormat df   new SimpleDateFormat  yyyy-MM-dd HH mm      mm for minutes and MM for mounth

User · Answer

Once you have you date parsed  I use this utility function to add hours  minutes or seconds   public class DateTimeUtils       private static final long ONE HOUR IN MS   3600000      private static final long ONE MIN IN MS   60000      private static final long ONE SEC IN MS   1000       public static Date sumTimeToDate Date date  int hours  int mins  int secs            long hoursToAddInMs   hours   ONE HOUR IN MS          long minsToAddInMs   mins   ONE MIN IN MS          long secsToAddInMs   secs   ONE SEC IN MS          return new Date date getTime     hoursToAddInMs   minsToAddInMs   secsToAddInMs             Be careful when adding long periods of time  1 day is not always 24 hours  daylight savings-type adjustments  leap seconds and so on   Calendar is recommended for that

User · Answer

The issue for you is that you are using mm  You should use MM  MM is for month and mm is for minutes  Try with yyyy-MM-dd HH mm  Other approach    It can be as simple as this  other option is to use joda-time    static final long ONE MINUTE IN MILLIS 60000   millisecs  Calendar date   Calendar getInstance    long t  date getTimeInMillis    Date afterAddingTenMins new Date t    10   ONE MINUTE IN MILLIS

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Work for me DateUtils    import import org apache commons lang time DateUtils                  Added and removed minutes to increase current range dates         Date horaInicialCorteEspecial   DateUtils addMinutes new Date corteEspecial horaInicial getTime    -1          Date horaFinalCorteEspecial   DateUtils addMinutes new Date corteEspecial horaFinal getTime    1

User · Answer

In order to avoid any dependency you can use java util Calendar as follow       Calendar now   Calendar getInstance        now add Calendar MINUTE  10       Date teenMinutesFromNow   now getTime      In Java 8 we have new API       LocalDateTime dateTime   LocalDateTime now   plus Duration of 10  ChronoUnit MINUTES        Date tmfn   Date from dateTime atZone ZoneId systemDefault    toInstant

User · Answer

There s an error in the pattern of your SimpleDateFormat  it should be   SimpleDateFormat df   new SimpleDateFormat  yyyy-MM-dd HH mm

User · Answer

you can use DateUtils class in org apache commons lang3 time package  int addMinuteTime   5  Date targetTime   new Date      now targetTime   DateUtils addMinutes targetTime  addMinuteTime     add minute

User · Answer

tl dr  LocalDateTime parse        2016-01-23 12 34  replace         T       atZone  ZoneId of   Asia Karachi       plusMinutes  10     java time  Use the excellent java time classes for date-time work  These classes supplant the troublesome old date-time classes such as java util Date and java util Calendar   ISO 8601  The java time classes use standard ISO 8601 formats by default for parsing generating strings of date-time values  To make your input string comply  replace the SPACE in the middle with a T    String input    2016-01-23 12 34    String inputModified   input replace         T       LocalDateTime  Parse your input string as a LocalDateTime as it lacks any info about time zone or offset-from-UTC   LocalDateTime ldt   LocalDateTime parse  inputModified      Add ten minutes   LocalDateTime ldtLater   ldt plusMinutes  10         ldt toString    2016-01-23T12 34      ldtLater toString    2016-01-23T12 44   See live code in IdeOne com   That LocalDateTime has no time zone  so it does not represent a point on the timeline  Apply a time zone to translate to an actual moment  Specify a proper time zone name in the format of continent region  such as America Montreal  Africa Casablanca  or Pacific Auckland  or Asia Karachi  Never use the 3-4 letter abbreviation such as EST or IST or PKT as they are not true time zones  not standardized  and not even unique       ZonedDateTime  If you know the intended time zone for this value  apply a ZoneId to get a ZonedDateTime    ZoneId z   ZoneId of   Asia Karachi     ZonedDateTime zdt   ldt atZone  z         zdt toString    2016-01-23T12 44 05 00 Asia Karachi    Anomalies  Think about whether to add those ten minutes before or after adding a time zone  You may get a very different result because of anomalies such as Daylight Saving Time  DST  that shift the wall-clock time   Whether you should add the 10 minutes before or after adding the zone depends on the meaning of your business scenario and rules   Tip  When you intend a specific moment on the timeline  always keep the time zone information  Do not lose that info  as done with your input data  Is the value 12 34 meant to be noon in Pakistan or noon in France or noon in Qu  bec  If you meant noon in Pakistan  say so by including at least the offset-from-UTC   05 00   and better still  the name of the time zone  Asia Karachi    Instant  If you want the same moment as seen through the lens of UTC  extract an Instant  The Instant class represents a moment on the timeline in UTC with a resolution of nanoseconds  up to nine  9  digits of a decimal fraction     Instant instant   zdt toInstant      Convert  Avoid the troublesome old date-time classes whenever possible  But if you must  you can convert  Call new methods added to the old classes    java util Date utilDate   java util Date from  instant        About java time  The java time framework is built into Java 8 and later  These classes supplant the troublesome old legacy date-time classes such as java util Date  Calendar   amp  SimpleDateFormat   The Joda-Time project  now in maintenance mode  advises migration to java time   To learn more  see the Oracle Tutorial  And search Stack Overflow for many examples and explanations  Specification is JSR 310   Where to obtain the java time classes     Java SE 8 and SE 9 and later   Built-in   Part of the standard Java API with a bundled implementation  Java 9 adds some minor features and fixes   Java SE 6 and SE 7   Much of the java time functionality is back-ported to Java 6  amp  7 in ThreeTen-Backport   Android   The ThreeTenABP project adapts ThreeTen-Backport  mentioned above  for Android specifically  See How to use        The ThreeTen-Extra project extends java time with additional classes  This project is a proving ground for possible future additions to java time  You may find some useful classes here such as Interval  YearWeek  YearQuarter  and more

[java] How to add minutes to my Date

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