Get first and last day of month using threeten LocalDate

Question

I have a LocalDate which needs to get the first and last day of the month   How do I do that   eg  13 2 2014 I need to get 1 2 2014 and 28 2 2014 in LocalDate formats   Using threeten LocalDate class

User · Answer

Just here to show my implementation for  herman solution  ZoneId americaLaPazZone   ZoneId of  UTC-04 00     static Date firstDateOfMonth Date date      LocalDate localDate   convertToLocalDateWithTimezone date     YearMonth baseMonth   YearMonth from localDate     LocalDateTime initialDate   baseMonth atDay firstDayOfMonth  atStartOfDay      return Date from initialDate atZone americaLaPazZone  toInstant        static Date lastDateOfMonth Date date      LocalDate localDate   convertToLocalDateWithTimezone date     YearMonth baseMonth   YearMonth from localDate     LocalDateTime lastDate   baseMonth atEndOfMonth   atTime 23  59  59     return Date from lastDate atZone americaLaPazZone  toInstant        static LocalDate convertToLocalDateWithTimezone Date date      return LocalDateTime from date toInstant   atZone americaLaPazZone   toLocalDate

User · Answer

The API was designed to support a solution that matches closely to business requirements  import static java time temporal TemporalAdjusters     LocalDate initial   LocalDate of 2014  2  13   LocalDate start   initial with firstDayOfMonth     LocalDate end   initial with lastDayOfMonth       However  Jon s solutions are also fine

User · Answer

Jon Skeets answer is right and has deserved my upvote  just adding this slightly different solution for completeness   import static java time temporal TemporalAdjusters lastDayOfMonth   LocalDate initial   LocalDate of 2014  2  13   LocalDate start   initial withDayOfMonth 1   LocalDate end   initial with lastDayOfMonth

User · Answer

Try this   LocalDate initial   LocalDate of 2014  2  13   LocalDate start   initial withDayOfMonth 1            LocalDate end   initial withDayOfMonth initial getMonthOfYear   getLastDayOfMonth false    System out println start   System out println end     you can find the desire output but need to take care of  parameter true false for getLastDayOfMonth method   that parameter denotes leap year

User · Answer

YearMonth  For completeness  and more elegant in my opinion  see this use of YearMonth class   YearMonth month   YearMonth from date   LocalDate start   month atDay 1   LocalDate end     month atEndOfMonth      For the first  amp  last day of the current month  this becomes   LocalDate start   YearMonth now   atDay 1   LocalDate end     YearMonth now   atEndOfMonth

User · Answer

If anyone comes looking for first day of previous month and last day of previous month   public static LocalDate firstDayOfPreviousMonth LocalDate date            return date minusMonths 1  withDayOfMonth 1           public static LocalDate lastDayOfPreviousMonth LocalDate date            return date withDayOfMonth 1  minusDays 1

User · Answer

LocalDate monthstart   LocalDate of year month 1    LocalDate monthend   monthstart plusDays monthstart lengthOfMonth  -1

User · Answer

You can try this to avoid indicating custom date and if there is need to display start and end dates of current month       LocalDate start   LocalDate now   minusDays LocalDate now   getDayOfMonth  -1       LocalDate end   LocalDate now   minusDays LocalDate now   getDayOfMonth    plusMonths 1       System out println  Start of month      start       System out println  End of month      end     Result    gt      Start of month  2019-12-01  gt      End of month  2019-12-30

User · Answer

if you want to do it only with the LocalDate-class   LocalDate initial   LocalDate of 2014  2  13    LocalDate start   LocalDate of initial getYear    initial getMonthValue   1       Idea  the last day is the same as the first day of next month minus one day  LocalDate end   LocalDate of initial getYear    initial getMonthValue    1  plusMonths 1  minusDays 1

User · Answer

Just use withDayOfMonth  and lengthOfMonth     LocalDate initial   LocalDate of 2014  2  13   LocalDate start   initial withDayOfMonth 1   LocalDate end   initial withDayOfMonth initial lengthOfMonth

[java] Get first and last day of month using threeten, LocalDate

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