How to get year month day hours minutes seconds and milliseconds of the current moment in Java

Question

How can I get the year  month  day  hours  minutes  seconds and milliseconds of the current moment in Java  I would like to have them as Strings

User · Answer

Use the formatting pattern  dd-MM-yyyy HH mm ss aa  to get date as 21-10-2020 20 53 42 pm

User · Answer

Switch to joda-time and you can do this in three lines  DateTime jodaTime   new DateTime     DateTimeFormatter formatter   DateTimeFormat forPattern  YYYY-MM-dd HH mm ss SSS    System out println  jodaTime       formatter print jodaTime      You also have direct access to the individual fields of the date without using a Calendar   System out println  year       jodaTime getYear     System out println  month       jodaTime getMonthOfYear     System out println  day       jodaTime getDayOfMonth     System out println  hour       jodaTime getHourOfDay     System out println  minute       jodaTime getMinuteOfHour     System out println  second       jodaTime getSecondOfMinute     System out println  millis       jodaTime getMillisOfSecond       Output is as follows   jodaTime   2010-04-16 18 09 26 060  year   2010 month   4 day   16 hour   18 minute   9 second   26 millis   60   According to http   www joda org joda-time      Joda-Time is the de facto standard date and time library for Java    From Java SE 8 onwards  users are asked to migrate to java time    JSR-310

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Java 8     System out println LocalDateTime now   getYear              2015     System out println LocalDateTime now   getMonth             SEPTEMBER     System out println LocalDateTime now   getDayOfMonth        29     System out println LocalDateTime now   getHour              7     System out println LocalDateTime now   getMinute            36     System out println LocalDateTime now   getSecond            51     System out println LocalDateTime now   get ChronoField MILLI OF SECOND       100         Calendar     System out println Calendar getInstance   get Calendar YEAR               2015     System out println Calendar getInstance   get Calendar MONTH     1        9     System out println Calendar getInstance   get Calendar DAY OF MONTH       29     System out println Calendar getInstance   get Calendar HOUR OF DAY        7     System out println Calendar getInstance   get Calendar MINUTE             35     System out println Calendar getInstance   get Calendar SECOND             32     System out println Calendar getInstance   get Calendar MILLISECOND        481         Joda Time     System out println new DateTime   getYear                  2015     System out println new DateTime   getMonthOfYear           9     System out println new DateTime   getDayOfMonth            29     System out println new DateTime   getHourOfDay             7     System out println new DateTime   getMinuteOfHour          19     System out println new DateTime   getSecondOfMinute        16     System out println new DateTime   getMillisOfSecond        174         Formatted        2015-09-28 17 50 25 756     System out println new Timestamp System currentTimeMillis              2015-09-28T17 50 25 772     System out println new SimpleDateFormat  yyyy-MM-dd T HH mm ss SSS   Locale ENGLISH  format new Date              Java 8        2015-09-28T17 50 25 810     System out println LocalDateTime now             joda time        2015-09-28 17 50 25 839     System out println DateTimeFormat forPattern  YYYY-MM-dd HH mm ss SSS   print new org joda time DateTime

User · Answer

Look at the API documentation for the java util Calendar class and its derivatives  you may be specifically interested in the GregorianCalendar class

User · Answer

Calendar now   new Calendar      or new GregorianCalendar    or whatever flavor you need  now MONTH now HOUR  etc

User · Answer

Or use java sql Timestamp   Calendar is kinda heavy I would recommend against using it  in production code  Joda is better   import java sql Timestamp   public class DateTest                    param args             public static void main String   args            System out println new Timestamp System currentTimeMillis

User · Answer

With Java 8 and later  use the java time package    ZonedDateTime now   getYear    ZonedDateTime now   getMonthValue    ZonedDateTime now   getDayOfMonth    ZonedDateTime now   getHour    ZonedDateTime now   getMinute    ZonedDateTime now   getSecond      ZonedDateTime now   is a static method returning the current date-time from the system clock in the default time-zone  All the get methods return an int value

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You can use the getters of java time LocalDateTime for that  LocalDateTime now   LocalDateTime now    int year   now getYear    int month   now getMonthValue    int day   now getDayOfMonth    int hour   now getHour    int minute   now getMinute    int second   now getSecond    int millis   now get ChronoField MILLI OF SECOND      Note  no direct getter available   System out printf  quot  d- 02d- 02d  02d  02d  02d  03d quot   year  month  day  hour  minute  second  millis    Or  when you re not on Java 8 yet  make use of java util Calendar  Calendar now   Calendar getInstance    int year   now get Calendar YEAR   int month   now get Calendar MONTH    1     Note  zero based  int day   now get Calendar DAY OF MONTH   int hour   now get Calendar HOUR OF DAY   int minute   now get Calendar MINUTE   int second   now get Calendar SECOND   int millis   now get Calendar MILLISECOND    System out printf  quot  d- 02d- 02d  02d  02d  02d  03d quot   year  month  day  hour  minute  second  millis    Either way  this prints as of now   2010-04-16 15 15 17 816  To convert an int to String  make use of String valueOf     If your intent is after all to arrange and display them in a human friendly string format  then better use either Java8 s java time format DateTimeFormatter  tutorial here   LocalDateTime now   LocalDateTime now    String format1   now format DateTimeFormatter ISO DATE TIME   String format2   now atZone ZoneId of  quot GMT quot    format DateTimeFormatter RFC 1123 DATE TIME   String format3   now format DateTimeFormatter ofPattern  quot yyyyMMddHHmmss quot   Locale ENGLISH     System out println format1   System out println format2   System out println format3    or when you re not on Java 8 yet  use java text SimpleDateFormat  Date now   new Date       java util Date  NOT java sql Date or java sql Timestamp  String format1   new SimpleDateFormat  quot yyyy-MM-dd T HH mm ss SSS quot   Locale ENGLISH  format now   String format2   new SimpleDateFormat  quot EEE  d MMM yyyy HH mm ss Z quot   Locale ENGLISH  format now   String format3   new SimpleDateFormat  quot yyyyMMddHHmmss quot   Locale ENGLISH  format now    System out println format1   System out println format2   System out println format3    Either way  this yields   2010-04-16T15 15 17 816 Fri  16 Apr 2010 15 15 17 GMT 20100416151517  See also   Java string to date conversion

User · Answer

in java 7 Calendar one line  new SimpleDateFormat  yyyy-MM-dd T HH mm ss SSS   format Calendar getInstance   getTime

User · Answer

tl dr  ZonedDateTime now                        Capture current moment as seen in the wall-clock time used by the people of a particular region  a time zone       ZoneId of   America Montreal         Specify desired expected time zone  Or pass  ZoneId systemDefault  for the JVM   s current default time zone                                           Returns a  ZonedDateTime  object   getMinute                               Extract the minute of the hour of the time-of-day from the  ZonedDateTime  object       42   ZonedDateTime  To capture the current moment as seen in the wall-clock time used by the people of a particular region  a time zone   use ZonedDateTime   A time zone is crucial in determining a date  For any given moment  the date varies around the globe by zone  For example  a few minutes after midnight in Paris France is a new day while still    yesterday    in Montr  al Qu  bec   If no time zone is specified  the JVM implicitly applies its current default time zone  That default may change at any moment during runtime     so your results may vary  Better to specify your desired expected time zone explicitly as an argument   Specify a proper time zone name in the format of continent region  such as America Montreal  Africa Casablanca  or Pacific Auckland  Never use the 3-4 letter abbreviation such as EST or IST as they are not true time zones  not standardized  and not even unique       ZoneId z   ZoneId of   America Montreal      ZonedDateTime zdt   ZonedDateTime now  z       Call any of the many getters to pull out pieces of the date-time   int    year          zdt getYear     int    monthNumber   zdt getMonthValue     String monthName     zdt getMonth   getDisplayName  TextStyle FULL   Locale JAPAN         Locale determines human language and cultural norms used in localizing  Note that  Locale  has  nothing  to do with time zone  int    dayOfMonth    zdt getDayOfMonth     String dayOfWeek     zdt getDayOfWeek   getDisplayName  TextStyle FULL   Locale CANADA FRENCH      int    hour          zdt getHour         Extract the hour from the time-of-day  int    minute        zdt getMinute     int    second        zdt getSecond     int    nano          zdt getNano       The java time classes resolve to nanoseconds  Your Question asked for the fraction of a second in milliseconds  Obviously  you can divide by a million to truncate nanoseconds to milliseconds  at the cost of possible data loss  Or use the TimeUnit enum for such conversion   long millis   TimeUnit NANOSECONDS toMillis  zdt getNano         DateTimeFormatter  To produce a String to combine pieces of text  use DateTimeFormatter class  Search Stack Overflow for more info on this   Instant  Usually best to track moments in UTC  To adjust from a zoned date-time to UTC  extract a Instant   Instant instant   zdt toInstant       And go back again   ZonedDateTime zdt   instant atZone  ZoneId of   Africa Tunis          LocalDateTime  A couple of other Answers use the LocalDateTime class  That class in not appropriate to the purpose of tracking actual moments  specific moments on the timeline  as it intentionally lacks any concept of time zone or offset-from-UTC   So what is LocalDateTime good for  Use LocalDateTime when you intend to apply a date  amp  time to any locality or all localities  rather than one specific locality      For example  Christmas this year starts at the LocalDateTime parse   2018-12-25T00 00 00     That value has no meaning until you apply a time zone  a ZoneId  to get a ZonedDateTime  Christmas happens first in Kiribati  then later in New Zealand and far east Asia  Hours later Christmas starts in India  More hour later in Africa  amp  Europe  And still not Xmas in the Americas until several hours later  Christmas starting in any one place should be represented with ZonedDateTime  Christmas everywhere is represented with a LocalDateTime      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 the java time classes   To learn more  see the Oracle Tutorial  And search Stack Overflow for many examples and explanations  Specification is JSR 310   You may exchange java time objects directly with your database  Use a JDBC driver compliant with JDBC 4 2 or later  No need for strings  no need for java sql   classes   Where to obtain the java time classes     Java SE 8  Java SE 9  Java SE 10  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 Java SE 7   Much of the java time functionality is back-ported to Java 6  amp  7 in ThreeTen-Backport   Android   Later versions of Android bundle implementations of the java time classes  For earlier Android   lt 26   the ThreeTenABP project adapts ThreeTen-Backport  mentioned above   See How to use ThreeTenABP

[java] How to get year, month, day, hours, minutes, seconds and milliseconds of the current moment in Java?

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