Convert String to java util Date

Question

I am storing the dates in a SQLite database in this format   d-MMM-yyyy HH mm ss aaa   When I retrieve the date with that format I am get every thing fine except the hour   The hour is always 00  Here is my output   String date--- gt 29-Apr-2010 13 00 14 PM After convrting Date--- gt 1272479414000--Thu Apr 29 00 00 14 GMT 05 30 2010   Here is the code       Date lScheduledDate   CalendarObj getTime        DateFormat formatter   new SimpleDateFormat  d-MMM-yyyy HH mm ss aaa        SomeClassObj setTime formatter format lScheduledDate         String lNextDate   SomeClassObj getTime        DateFormat lFormatter   new SimpleDateFormat  d-MMM-yyyy HH mm ss aaa        Date lNextDate    Date lFormatter parse lNextDate       System out println  output here  lNextDate     What am I doing wrong

User · Answer

It sounds like you may want to use something like SimpleDateFormat. http://java.sun.com/j2se/1.4.2/docs/api/java/text/SimpleDateFormat.html

You declare your date format and then call the parse method with your string.

private static final DateFormat DF = new SimpleDateFormat(...);
Date myDate = DF.parse("1234");

And as Guillaume says, set the timezone!

User · Answer

I think your date format does not make sense  There is no 13 00 PM  Remove the  aaa  at the end of your format or turn the HH into hh   Nevertheless  this works fine for me   String testDate    29-Apr-2010 13 00 14 PM   DateFormat formatter   new SimpleDateFormat  d-MMM-yyyy HH mm ss aaa    Date date   formatter parse testDate   System out println date     It prints  Thu Apr 29 13 00 14 CEST 2010

User · Answer

java time  While in 2010  java util Date was the class we all used  toghether with DateFormat and Calendar   those classes were always poorly designed and are now long outdated  Today one would use java time  the modern Java date and time API           DateTimeFormatter formatter   DateTimeFormatter ofPattern  d-MMM-yyyy HH mm ss             String dateTimeStringFromSqlite    29-Apr-2010 13 00 14           LocalDateTime dateTime   LocalDateTime parse dateTimeStringFromSqlite  formatter           System out println  output here      dateTime     Output is      output here  2010-04-29T13 00 14   What went wrong in your code   The combination of uppercase HH and aaa in your format pattern strings does not make much sense since HH is for hour of day  rendering the AM PM marker from aaa superfluous  It should not do any harm  though  and I have been unable to reproduce the exact results you reported  In any case  your comment is to the point no matter if one uses the old-fashioned SimpleDateFormat or the modern DateTimeFormatter       aaa  should not be used  if you use  aaa  then specify  hh    Lowercase hh is for hour within AM or PM  from 01 through 12  so would require an AM PM marker   Other tips   In your database  since I understand that SQLite hasn   t got a built-in datetime type  use the standard ISO 8601 format and store time in UTC  for example 2010-04-29T07 30 14Z  the modern Instant class parses and formats such strings as its default  that is  without any explicit formatter   Don   t use an offset such as GMT 05 30 for time zone  Prefer a real time zone  for example Asia Colombo  Asia Kolkata or America New York  If you wanted to use the outdated DateFormat  its parse method returns a Date  so you don   t need the cast in Date lNextDate    Date lFormatter parse lNextDate      Question  Can I use java time on Android   Yes  java time works nicely on older and newer Android devices  It just requires at least Java 6    In Java 8 and later and on newer Android devices  from API level 26  the modern API comes built-in  In Java 6 and 7 get the ThreeTen Backport  the backport of the modern classes  ThreeTen for JSR 310  see the links at the bottom   On  older  Android use the Android edition of ThreeTen Backport  It   s called ThreeTenABP  And make sure you import the date and time classes from org threeten bp with subpackages    Links   Oracle tutorial  Date Time explaining how to use java time  Java Specification Request  JSR  310  where java time was first described  ThreeTen Backport project  the backport of java time to Java 6 and 7  ThreeTen for JSR-310   ThreeTenABP  Android edition of ThreeTen Backport Question  How to use ThreeTenABP in Android Project  with a very thorough explanation  Wikipedia article  ISO 8601

User · Answer

You should set a TimeZone in your DateFormat  otherwise it will use the default one  depending on the settings of the computer

[java] Convert String to java.util.Date

Examples related to java

Examples related to date

Examples related to datetime-format