how to get a list of dates between two dates in java

Question

I want a list of dates between start date and end date     The result should be a list of all dates including the start and end date

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Get the number of days between dates  inclusive   public static List lt Date gt  getDaysBetweenDates Date startdate  Date enddate        List lt Date gt  dates   new ArrayList lt Date gt         Calendar calendar   new GregorianCalendar        calendar setTime startdate        while  calendar getTime   before enddate                 Date result   calendar getTime            dates add result           calendar add Calendar DATE  1             return dates

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You can also look at the Date getTime   API  That gives a long to which you can add your increment  Then create a new Date   List lt Date gt  dates   new ArrayList lt Date gt     long interval   1000   60   60     1 hour in millis long endtime        create your endtime here  possibly using Calendar or Date long curTime   startDate getTime    while  curTime  lt   endTime      dates add new Date curTime      curTime    interval      and maybe apache commons has something like this in DateUtils  or perhaps they have a CalendarUtils too     EDIT  including the start and enddate may not be possible if your interval is not perfect

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Streams  Edit  Joda-Time is now deprecated  changed the answer to use Java 8 instead   Here is the Java 8 way  using streams   List lt LocalDate gt  daysRange   Stream iterate startDate  date - gt  date plusDays 1   limit numOfDays  collect Collectors toList

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This will add all dates between two dates and It will add current dates and then new dates will be added based on loop condition         private void onDateSet        Calendar endDate   Calendar getInstance   startDate   Calendar getInstance        startDate set currentYear currentMonthOfYear currentDayOfMonth       endDate set inputYear inputMonthOfYear inputDayOfMonth       datesToAdd startDate endDate                call for get dates list     private List lt Date gt  datesToAdd Calendar startDate Calendar endDate                       List lt Dates gt  datesLists   new List lt  gt                         while  startDate get Calendar YEAR     endDate get Calendar YEAR                                   startDate get Calendar MONTH     endDate get Calendar MONTH                                startDate get Calendar DAY OF MONTH     endDate get Calendar DAY OF MONTH                                   datesList add new Date startDate get Calendar YEAR   startDate get Calendar MONTH   startDate get Calendar DATE                                  startDate add Calendar DATE  1    increas dates                                                      return datesList

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With Joda-Time   maybe it s better   LocalDate dateStart   new LocalDate  2012-01-15    LocalDate dateEnd   new LocalDate  2012-05-23       day by day  while dateStart isBefore dateEnd        System out println dateStart       dateStart   dateStart plusDays 1       It s my solution     very easy

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One solution would be to create a Calendar instance  and start a cycle  increasing it s Calendar DATE field until it reaches the desired date  Also  on each step you should create a Date instance  with corresponding parameters   and put it to your list   Some dirty code       public List lt Date gt  getDatesBetween final Date date1  final Date date2        List lt Date gt  dates   new ArrayList lt Date gt          Calendar calendar   new GregorianCalendar              set Calendar YEAR  date1 getYear             set Calendar MONTH  date1 getMonth             set Calendar DATE  date1 getDate                  while  calendar get Calendar YEAR     date2 getYear    amp  amp  calendar get Calendar MONTH     date2 getMonth    amp  amp  calendar get Calendar DATE     date2 getDate              calendar add Calendar DATE  1           dates add new Date calendar get Calendar YEAR   calendar get Calendar MONTH   calendar get Calendar DATE                return dates

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With java 8  public Stream lt LocalDate gt  getDaysBetween LocalDate startDate  LocalDate endDate        return IntStream range 0   int  DAYS between startDate  endDate   mapToObj startDate  plusDays

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Back in 2010  I suggested to use Joda-Time for that  Note that Joda-Time is now in maintenance mode  Since 1 8  2014   you should use java time   Add one day at a time until reaching the end date  int days   Days daysBetween startDate  endDate  getDays    List lt LocalDate gt  dates   new ArrayList lt LocalDate gt  days       Set initial capacity to  days   for  int i 0  i  lt  days  i          LocalDate d   startDate withFieldAdded DurationFieldType days    i       dates add d      It wouldn t be too hard to implement your own iterator to do this as well  that would be even nicer

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List lt Date gt  dates   new ArrayList lt Date gt     String str date    DD MM YYYY   String end date    DD MM YYYY   DateFormat formatter   new SimpleDateFormat  dd MM yyyy    Date startDate    Date formatter parse str date    Date endDate    Date formatter parse end date   long interval   1000   60   60     1 hour in milliseconds long endTime   endDate getTime        create your endtime here  possibly using Calendar or Date long curTime   startDate getTime     while  curTime  lt   endTime        dates add new Date curTime        curTime    interval    for  int i   0  i  lt  dates size    i         Date lDate    Date dates get i       String ds   formatter format lDate           System out println  Date is        ds         Write your code for storing dates to list

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Recommending date streams  In Java 9  you can use following new method  LocalDate  datesUntil   LocalDate start   LocalDate of 2017  2  1   LocalDate end   LocalDate of 2017  2  28    Stream lt LocalDate gt  dates   start datesUntil end plusDays 1    List lt LocalDate gt  list   dates collect Collectors toList       The new method datesUntil      works with an exclusive end date  hence the shown hack to add a day   Once you have obtained a stream you can exploit all the features offered by java util stream- or java util function-packages  Working with streams has become so simple compared with earlier approaches based on customized for- or while-loops     Or if you look for a stream-based solution which operates on inclusive dates by default but can also be configured otherwise then you might find the class DateInterval in my library Time4J interesting because it offers a lot of special features around date streams including a performant spliterator which is faster than in Java-9   PlainDate start   PlainDate of 2017   2  1   PlainDate end   start with PlainDate DAY OF MONTH maximized     Stream lt PlainDate gt  stream   DateInterval streamDaily start  end     Or even simpler in case of full months   Stream lt PlainDate gt  februaryDates   CalendarMonth of 2017  2  streamDaily    List lt LocalDate gt  list        februaryDates map PlainDate  toTemporalAccessor  collect Collectors toList

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Enhancing one of the above solutions  As adding 1 day to end date sometimes adds an extra day beyond the end date         public static List getDaysBetweenDates Date startdate  Date enddate                List dates   new ArrayList            Calendar startDay   new GregorianCalendar            calendar setTime startdate           Calendar endDay   new GregorianCalendar            endDay setTime enddate           endDay add Calendar DAY OF YEAR  1           endDay set Calendar HOUR OF DAY  0           endDay set Calendar MINUTE  0           endDay set Calendar SECOND  0           endDay set Calendar MILLISECOND  0            while  calendar getTime   before endDay getTime                   Date result   startDay getTime                dates add result               startDay add Calendar DATE  1                     return dates

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A tail-recursive version   public static void datesBetweenRecursive Date startDate  Date endDate  List lt Date gt  dates        if  startDate before endDate             dates add startDate           Calendar calendar   Calendar getInstance            calendar setTime startDate           calendar add Calendar DATE  1           datesBetweenRecursive calendar getTime    endDate  dates

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With Lamma it looks like this in Java       for  Date d  Dates from 2014  6  29  to 2014  7  1  build              System out println d           and the output is       Date 2014 6 29      Date 2014 6 30      Date 2014 7 1

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List lt LocalDate gt  totalDates   new ArrayList lt  gt     popularDatas startDate  endDate  totalDates   System out println totalDates    private void popularDatas LocalDate startDate  LocalDate endDate  List lt LocalDate gt  datas        if   startDate plusDays 1  isAfter endDate             popularDatas startDate plusDays 1   endDate  datas              datas add startDate       Recursive solution

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This is simple solution for get a list of dates   import java io    import java util    import java text SimpleDateFormat    public class DateList    public static SimpleDateFormat dateFormat   new SimpleDateFormat  yyyy-MM-dd      public static void main  String   args  throws java lang Exception         Date dt   new Date        System out println dt            List lt Date gt  dates   getDates  2017-01-01  dateFormat format new Date                IF you don t want to reverse then remove Collections reverse dates            Collections reverse dates           System out println dates size         for Date date dates                System out println date             public static List lt Date gt  getDates String fromDate  String toDate         ArrayList lt Date gt  dates   new ArrayList lt Date gt          try            Calendar fromCal   Calendar getInstance            fromCal setTime dateFormat  parse fromDate             Calendar toCal   Calendar getInstance            toCal setTime dateFormat  parse toDate             while  fromCal after toCal                         dates add fromCal getTime                 fromCal add Calendar DATE  1                     catch  Exception e            System out println e             return dates

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please find the below code   List lt Date gt  dates   new ArrayList lt Date gt      String str date   27 08 2010   String end date   02 09 2010    DateFormat formatter     formatter   new SimpleDateFormat  dd MM yyyy    Date  startDate    Date formatter parse str date    Date  endDate    Date formatter parse end date   long interval   24 1000   60   60     1 hour in millis long endTime  endDate getTime        create your endtime here  possibly using Calendar or Date long curTime   startDate getTime    while  curTime  lt   endTime        dates add new Date curTime        curTime    interval    for int i 0 i lt dates size   i         Date lDate   Date dates get i       String ds   formatter format lDate           System out println   Date is        ds       output        Date is    27 08 2010    Date is    28 08 2010    Date is    29 08 2010    Date is    30 08 2010    Date is    31 08 2010    Date is    01 09 2010    Date is    02 09 2010

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Here is my method for getting dates between two dates  including   w o  including business days  It also takes source and desired date format as parameter   public static List lt String gt  getAllDatesBetweenTwoDates String stdate String enddate String givenformat String resultformat boolean onlybunessdays  throws ParseException          DateFormat sdf          DateFormat sdf1          List lt Date gt  dates   new ArrayList lt Date gt             List lt String gt  dateList   new ArrayList lt String gt               SimpleDateFormat checkformat   new SimpleDateFormat resultformat              checkformat applyPattern  EEE        to get Day of week         try              sdf   new SimpleDateFormat givenformat               sdf1   new SimpleDateFormat resultformat               stdate sdf1 format sdf parse stdate                enddate sdf1 format sdf parse enddate                 Date  startDate    Date sdf1 parse  stdate                Date  endDate    Date sdf1 parse  enddate               long interval   24 1000   60   60     1 hour in millis             long endTime  endDate getTime        create your endtime here  possibly using Calendar or Date             long curTime   startDate getTime                while  curTime  lt   endTime                    dates add new Date curTime                    curTime    interval                            for int i 0 i lt dates size   i                     Date lDate   Date dates get i                   String ds   sdf1 format lDate                      if onlybunessdays                       String day  checkformat format lDate                        if  day equalsIgnoreCase  Sat    amp  amp   day equalsIgnoreCase  Sun                               dateList add ds                                          else                        dateList add ds                                        System out println   Date is        ds                             catch ParseException e               e printStackTrace                throw e           finally              sdf null              sdf1 null                    return dateList          And the method call would be like    public static void main String aregs    throws Exception           System out println getAllDatesBetweenTwoDates  2015 09 27   2015 10 05   yyyy MM dd   dd-MM-yyyy  false            You can find the demo code   Click Here

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public static List lt Date gt  getDaysBetweenDates Date startDate  Date endDate           ArrayList lt Date gt  dates   new ArrayList lt Date gt             Calendar cal1   Calendar getInstance            cal1 setTime startDate            Calendar cal2   Calendar getInstance            cal2 setTime endDate            while cal1 before cal2     cal1 equals cal2                         dates add cal1 getTime                 cal1 add Calendar DATE  1                     return dates

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java time Package  If you are using Java 8  there is a much cleaner approach  The new java time package in Java 8 incorporates the features of the Joda-Time API   Your requirement can be solved using the below code   String s    2014-05-01   String e    2014-05-10   LocalDate start   LocalDate parse s   LocalDate end   LocalDate parse e   List lt LocalDate gt  totalDates   new ArrayList lt  gt     while   start isAfter end         totalDates add start       start   start plusDays 1

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java9 features you can calculate like this   public  List lt LocalDate gt  getDatesBetween    LocalDate startDate  LocalDate endDate        return startDate datesUntil endDate        collect Collectors toList

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Like as  folone  but correct  private static List lt Date gt  getDatesBetween final Date date1  final Date date2        List lt Date gt  dates   new ArrayList lt  gt         Calendar c1   new GregorianCalendar        c1 setTime date1       Calendar c2   new GregorianCalendar        c2 setTime date2       int a   c1 get Calendar DATE       int b   c2 get Calendar DATE       while   c1 get Calendar YEAR     c2 get Calendar YEAR       c1 get Calendar MONTH     c2 get Calendar MONTH       c1 get Calendar DATE     c2 get Calendar DATE              c1 add Calendar DATE  1           dates add new Date c1 getTimeInMillis                return dates

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Something like this should definitely work   private List lt Date gt  getListOfDaysBetweenTwoDates Date startDate  Date endDate        List lt Date gt  result   new ArrayList lt Date gt         Calendar start   Calendar getInstance        start setTime startDate       Calendar end   Calendar getInstance        end setTime endDate       end add Calendar DAY OF YEAR  1     Add 1 day to endDate to make sure endDate is included into the final list     while  start before end             result add start getTime             start add Calendar DAY OF YEAR  1             return result

[java] how to get a list of dates between two dates in java

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