I have this code that generates a date and time,
ZoneId z = ZoneId.of( "Africa/Nairobi" );
Instant instant = Instant.now();
ZonedDateTime zdt = instant.atZone(z);
return zdt.toString();
//2018-03-19T09:03:22.858+03:00[Africa/Nairobi]
Is there a lib like chrono - https://docs.oracle.com/javase/8/docs/api/java/time/temporal/ChronoField.html field that I can use to get the date, hour and minute?
Chrono fields does not extract the complete date.
Since you seem to have been confused about how to get the date from your ZonedDateTime
, I should like to supplement Claudiu Guja’a good and correct answer.
ZoneId z = ZoneId.of("Africa/Nairobi");
ZonedDateTime zdt = ZonedDateTime.now(z);
System.out.println("Date " + zdt.toLocalDate());
System.out.println("Year " + zdt.getYear());
System.out.println("Month " + zdt.getMonth());
System.out.println("Day of month " + zdt.getDayOfMonth());
This just printed:
Date 2018-03-19
Year 2018
Month MARCH
Day of month 19
Please check the documentation for more methods including getMonthValue
for the number of the month (1 through 12). I include a link at the bottom. Since ZonedDateTime
class has a now
method, you don’t need Instant.now()
first.
If you wanted an old-fashioned java.util.Date
object — first answer is: don’t. The modern API you are already using is much nicer to work with. Only if you need a Date
for some legacy API that you cannot change or don’t want to change just now, get an Instant
and convert it:
Instant instant = Instant.now();
Date oldfashionedDateObject = Date.from(instant);
System.out.println("Old-fashioned java.util.Date " + oldfashionedDateObject);
This printed:
Old-fashioned java.util.Date Mon Mar 19 12:00:05 CET 2018
Even though it says CET
for Central European Time in the string, the Date
does not contain a time zone (this confuses many). Only its toString
method (called implicitly when I append the Date
to a String
) grabs the JVM’s time zone setting and uses it for generating the String
while the Date
stays unaffected.
In the special case where you just want a Date
representing the date-time now, again, it’s ill-advised unless you have a very specific need, it’s very simple:
Date oldfashionedDateObject = new Date();
The result is the same as above.