I need to convert a String containing date into an date object. The String will be of the format "yyyy-mm-dd HH:mm:ss.SSSSSS" and I want the same format in an date object.
For instance I have a string "2012-07-10 14:58:00.000000", and I need the resultant date object to be of the same format.
I have tried the below methods but, the resultant is not as expected.
java.util.Date temp = new SimpleDateFormat("yyyy-mm-dd HH:mm:ss.SSSSSS").parse("2012-07-10 14:58:00.000000");
DateFormat dateFormat = new SimpleDateFormat("yyyy-mm-dd HH:mm:ss");
Date thisDate = dateFormat.parse("2012-07-10 14:58:00.000000");
The result is "Tue Jan 10 14:58:00 EST 2012". Please let me know where I am going wrong.
Thanks, Yeshwanth Kota
java.util.Date temp = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSSSSS").parse("2012-07-10 14:58:00.000000");
The mm
is minutes you want MM
CODE
public class Test {
public static void main(String[] args) throws ParseException {
java.util.Date temp = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSSSSS")
.parse("2012-07-10 14:58:00.000000");
System.out.println(temp);
}
}
Prints:
Tue Jul 10 14:58:00 EDT 2012
For future reference:
yyyy => 4 digit year
MM => 2 digit month (you must type MM in ALL CAPS)
dd => 2 digit "day of the month"
HH => 2-digit "hour in day" (0 to 23)
mm => 2-digit minute (you must type mm in lowercase)
ss => 2-digit seconds
SSS => milliseconds
So "yyyy-MM-dd HH:mm:ss" returns "2018-01-05 09:49:32"
But "MMM dd, yyyy hh:mm a" returns "Jan 05, 2018 09:49 am"
The so-called examples at https://docs.oracle.com/javase/7/docs/api/java/text/SimpleDateFormat.html show only output. They do not tell you what formats to use!
LocalDateTime.parse(
"2012-07-10 14:58:00.000000".replace( " " , "T" )
)
You are attempting to squeeze a value with microseconds (six decimal digits) into a data type capable only of milliseconds resolution (three decimal digits). That is impossible.
Instead, use a data type with fine enough resolution. The java.time classes use nanosecond resolution (nine decimal digits).
You are attempting to put a value lacking any offset-from-UTC or time zone into a data type ( Date
) that only represents values in UTC. So you are adding information (UTC offset) not intended by the input.
Use an appropriate data type instead. Specifically, java.time.LocalDateTime
.
Other Answers and Comments correctly explain that the formatting pattern codes are case-sensitive. So MM
and mm
have different effects.
The troublesome old date-time classes bundled with the earliest versions of Java are now legacy, supplanted by the java.time classes built into Java 8 and later.
Your input strings nearly comply with the ISO 8601 standard formats. Replace the SPACE in the middle with a T
to comply fully.
The java.time classes use the standard formats by default when parsing/generating strings. So no need to specify a formatting pattern.
and I need the resultant date object to be of the same format.
No, date-time objects do not have a "format". Do not conflate date-time objects with mere strings. Strings are inputs and outputs of the objects. The objects maintain their own internal representions of the date-time info, the details of which are irrelevant to us as calling programmers.
Your input lacks any indicator of offset-from-UTC or troublesome me zone. So we parse as a LocalDateTime
objects which lacks those concepts.
String input = "2012-07-10 14:58:00.000000".replace( " " , "T" ) ;
LocalDateTime ldt = LocalDateTime.parse( input ) ;
To generate a String representing the value of your LocalDateTime
:
toString
to get a String in standard ISO 8601 format.DateTimeFormatter
for producing strings in either custom formats or automatically-localized formats.Search Stack Overflow for more info as these topics have been covered many many times already.
ZonedDateTime
A LocalDateTime
does not represent an exact point on the timeline.
To determine an actual moment, assign a time zone. For example noon in Kolkata India comes much earlier than noon in Paris France. Noon without a time zone could be happening at any point over a range of about 26-27 hours.
ZoneId z = ZoneId.of( "Asia/Kolkata" ) ;
ZonedDateTime zdt = ldt.atZone( z ) ;
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
, & SimpleDateFormat
.
To learn more, see the Oracle Tutorial . And search Stack Overflow for many examples and explanations. Specification is JSR 310 .
The Joda-Time project, now in maintenance mode , advises migration to the java.time classes.
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. Hibernate 5 & JPA 2.2 support java.time .
Where to obtain the java.time classes?
Your not applying Date formator. rather you are just parsing the date. to get output in this format
yyyy-MM-dd HH:mm:ss.SSSSSS
we have to use format() method here is full example:- Here is full example:- it will take Date in this format yyyy-MM-dd HH:mm:ss.SSSSSS
and as result we will get output as same as this format yyyy-MM-dd HH:mm:ss.SSSSSS
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
//TODO OutPut should LIKE in this format yyyy-MM-dd HH:mm:ss.SSSSSS.
public class TestDateExample {
public static void main(String args[]) throws ParseException {
SimpleDateFormat changeFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSSSSS");
java.util.Date temp = changeFormat.parse("2012-07-10 14:58:00.000000");
Date thisDate = changeFormat.parse("2012-07-10 14:58:00.000000");
System.out.println(thisDate);
System.out.println("----------------------------");
System.out.println("After applying formating :");
String strDateOutput = changeFormat.format(temp);
System.out.println(strDateOutput);
}
}
its work for me SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); sdf.format(new Date));
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