Calendar date to yyyy-MM-dd format in java

Question

How to convert calendar date to yyyy-MM-dd format   Calendar cal   Calendar getInstance    cal add Calendar DATE  1   Date date   cal getTime                 SimpleDateFormat format1   new SimpleDateFormat  yyyy-MM-dd    String date1   format1 format date               Date inActiveDate   null  try       inActiveDate   format1 parse date1     catch  ParseException e1           TODO Auto-generated catch block     e1 printStackTrace        This will produce inActiveDate   Wed Sep 26 00 00 00 IST 2012  But what I need is 2012-09-26  My purpose is to compare this date with another date in my database using Hibernate criteria  So I need the date object in yyyy-MM-dd format

User · Answer

I found this code where date is compared in a format to compare with date field in database...may be this might be helpful to you...

When you convert the string to date using simpledateformat, it is hard to compare with the Date field in mysql databases.

So convert the java string date in the format using select STR_to_DATE('yourdate','%m/%d/%Y') --> in this format, then you will get the exact date format of mysql date field.

http://javainfinite.com/java/java-convert-string-to-date-and-compare/

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public static void main String   args        Calendar cal   Calendar getInstance        cal set year  month  date       SimpleDateFormat format1   new SimpleDateFormat  yyyy MM dd        String formatted   format1 format cal getTime         System out println formatted

User · Answer

Calendar cal   Calendar getInstance    cal add Calendar DATE  7   Date date   c getTime    SimpleDateFormat ft   new SimpleDateFormat  MM-dd-YYYY    JOptionPane showMessageDialog null  ft format date      This will display your date   7 days in month  day and year format in a JOption window pane

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java util Date object can t represent date in custom format instead you ve to use SimpleDateFormat format method that returns string   String myString format1 format date

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java time  The answer by MadProgrammer is correct  especially the tip about Joda-Time  The successor to Joda-Time is now built into Java 8 as the new java time package  Here s example code in Java 8   When working with date-time  as opposed to local date   the time zone in critical  The day-of-month depends on the time zone  For example  the India time zone is  05 30  five and a half hours ahead of UTC   while France is only one hour ahead  So a moment in a new day in India has one date while the same moment in France has    yesterday   s    date  Creating string output lacking any time zone or offset information is creating ambiguity  You asked for YYYY-MM-DD output so I provided  but I don t recommend it  Instead of ISO LOCAL DATE I would have used ISO DATE to get this output  2014-02-25 05 30  ZoneId zoneId   ZoneId of   Asia Kolkata     ZonedDateTime zonedDateTime   ZonedDateTime now  zoneId     DateTimeFormatter formatterOutput   DateTimeFormatter ISO LOCAL DATE     Caution  The  LOCAL  part means we are losing time zone information  creating ambiguity  String output   formatterOutput format  zonedDateTime      Dump to console     System out println   zonedDateTime      zonedDateTime    System out println   output      output      When run     zonedDateTime  2014-02-25T14 22 20 919 05 30 Asia Kolkata  output  2014-02-25   Joda-Time  Similar code using the Joda-Time library  the precursor to java time   DateTimeZone zone   new DateTimeZone   Asia Kolkata     DateTime dateTime   DateTime now  zone    DateTimeFormatter formatter   ISODateTimeFormat date    String output   formatter print  dateTime      ISO 8601  By the way  that format of your input string is a standard format  one of several handy date-time string formats defined by ISO 8601    Both Joda-Time and java time use ISO 8601 formats by default when parsing and generating string representations of various date-time values

User · Answer

In order to parse a java util Date object you have to convert it to String first using your own format   inActiveDate   format1 parse   format1 format date        But I believe you are being redundant here

User · Answer

Your code is wrong  No point of  parsing date and keep that as Date object    You can format the calender date object when you want to display and keep  that as a string    Calendar cal   Calendar getInstance    cal add Calendar DATE  1   Date date   cal getTime                 SimpleDateFormat format1   new SimpleDateFormat  yyyy-MM-dd              String inActiveDate   null  try       inActiveDate   format1 format date       System out println inActiveDate      catch  ParseException e1           TODO Auto-generated catch block     e1 printStackTrace

User · Answer

A Java Date is a container for the number of milliseconds since January 1  1970  00 00 00 GMT   When you use something like System out println date   Java uses Date toString   to print the contents   The only way to change it is to override Date and provide your own implementation of Date toString     Now before you fire up your IDE and try this  I wouldn t  it will only complicate matters  You are better off formatting the date to the format you want to use  or display    Java 8   LocalDateTime ldt   LocalDateTime now   plusDays 1   DateTimeFormatter formmat1   DateTimeFormatter ofPattern  yyyy-MM-dd   Locale ENGLISH   System out println ldt      Output  2018-05-12T17 21 53 658   String formatter   formmat1 format ldt   System out println formatter      2018-05-12   Prior to Java 8  You should be making use of the ThreeTen Backport  The following is maintained for historical purposes  as the original answer   What you can do  is format the date   Calendar cal   Calendar getInstance    cal add Calendar DATE  1   SimpleDateFormat format1   new SimpleDateFormat  yyyy-MM-dd    System out println cal getTime        Output  Wed Sep 26 14 23 28 EST 2012   String formatted   format1 format cal getTime     System out println formatted      Output  2012-09-26   System out println format1 parse formatted       Output  Wed Sep 26 00 00 00 EST 2012    These are actually the same date  represented differently

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public static String ThisWeekStartDate WebDriver driver            Calendar c   Calendar getInstance              ensure the method works within current month         c set Calendar DAY OF WEEK  Calendar SUNDAY           System out println  Before Start Date     c getTime             Date date   c getTime               SimpleDateFormat dfDate   new SimpleDateFormat  dd MMM yyyy hh mm a               String CurrentDate   dfDate format date             System out println  Start Date     CurrentDate             return CurrentDate             public static String ThisWeekEndDate WebDriver driver             Calendar c   Calendar getInstance              ensure the method works within current month         c set Calendar DAY OF WEEK  Calendar SATURDAY           System out println  Before End Date     c getTime             Date date   c getTime               SimpleDateFormat dfDate   new SimpleDateFormat  dd MMM yyyy hh mm a               String CurrentDate   dfDate format date             System out println  End Date     CurrentDate             return CurrentDate

[java] Calendar date to yyyy-MM-dd format in java

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