How to convert an Instant to a date format

Question

I can convert a java util Date to a java time Instant  Java 8 and later  this way     Calendar cal   Calendar getInstance    cal set Calendar HOUR OF DAY  8   cal set Calendar MINUTE  30   Date startTime   cal getTime    Instant i   startTime toInstant      Can anybody let me know about the convert that instant to date with a specific date  amp  time format  i e 2015-06-02 8 30 00  I have gone through api but could not find a satisfactory answer

User · Answer

An Instant is what it says  a specific instant in time - it does not have the notion of date and time  the time in New York and Tokyo is not the same at a given instant    To print it as a date time  you first need to decide which timezone to use  For example   System out println LocalDateTime ofInstant i  ZoneOffset UTC      This will print the date time in iso format  2015-06-02T10 15 02 325  If you want a different format you can use a formatter   LocalDateTime datetime   LocalDateTime ofInstant i  ZoneOffset UTC   String formatted   DateTimeFormatter ofPattern  yyyy-MM-dd hh mm ss   format datetime   System out println formatted

User · Answer

Instant i   Instant ofEpochSecond cal getTime     Read more here and here

User · Answer

If you want to convert an Instant to a Date   Date myDate   Date from instant     And then you can use SimpleDateFormat for the formatting part of your question   SimpleDateFormat formatter   new SimpleDateFormat  dd MM yyyy HH mm ss    String formattedDate   formatter format myDate

User · Answer

try Parsing and Formatting  Take an example Parsing  String input        try       DateTimeFormatter formatter                         DateTimeFormatter ofPattern  MMM d yyyy        LocalDate date   LocalDate parse input  formatter       System out printf   s n   date     catch  DateTimeParseException exc        System out printf   s is not parsable  n   input       throw exc          Rethrow the exception      Formatting  ZoneId leavingZone        ZonedDateTime departure         try       DateTimeFormatter format   DateTimeFormatter ofPattern  MMM d yyyy  hh mm a        String out   departure format format       System out printf  LEAVING    s   s  n   out  leavingZone     catch  DateTimeException exc        System out printf   s can t be formatted  n   departure       throw exc      The output for this example  which prints both the arrival and departure time  is as follows   LEAVING   Jul 20 2013  07 30 PM  America Los Angeles  ARRIVING  Jul 21 2013  10 20 PM  Asia Tokyo    For more details check this page- https   docs oracle com javase tutorial datetime iso format html

[java] How to convert an Instant to a date format?

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