Java ZonedDateTime class

Java ZonedDateTime class is an immutable representation of a date-time with a time-zone. It inherits Object class and implements the ChronoZonedDateTime interface.

ZonedDateTime class is used to store all date and time fields, to a precision of nanoseconds, and a time-zone with a zone offset used to handle ambiguous local date-times.

Java ZonedDateTime class declaration

Let's see the declaration of java.time.ZonedDateTime class.

public final class ZonedDateTime extends Object 
implements Temporal, ChronoZonedDateTime<LocalDate>, Serializable

Methods of Java ZonedDateTime

Method	Description
String format(DateTimeFormatter formatter)	It is used to format this date-time using the specified formatter.
int get(TemporalField field)	It is used to get the value of the specified field from this date-time as an int.
ZoneId getZone()	It is used to get the time-zone, such as 'Asia/Kolkata'.
ZonedDateTime withZoneSameInstant(ZoneId zone)	It is used to return a copy of this date-time with a different time-zone, retaining the instant.
static ZonedDateTime now()	It is used to obtain the current date-time from the system clock in the default time-zone.
static ZonedDateTime of(LocalDate date, LocalTime time, ZoneId zone)	It is used to obtain an instance of ZonedDateTime from a local date and time.
ZonedDateTime minus(long amountToSubtract, TemporalUnit unit)	It is used to return a copy of this date-time with the specified amount subtracted.
ZonedDateTime plus(long amountToAdd, TemporalUnit unit)	It is used to return a copy of this date-time with the specified amount added.

Java ZonedDateTime class Example

import java.time.ZonedDateTime;
public class ZonedDateTimeExample1{
  public static void main(String[] args) {
    ZonedDateTime zone = ZonedDateTime.parse("2016-10-05T08:20:10+05:30[Asia/Kolkata]");
    System.out.println(zone);
  }
}

Test it Now

Output:

2016-10-05T08:20:10+05:30[Asia/Kolkata]

Java ZonedDateTime class Example: of() and withZoneSameInstant()

import java.time.*;
public class ZonedDateTimeExample2{
  public static void main(String[] args) {
    LocalDateTime  ldt = LocalDateTime.of(2017, Month.JANUARY,  19,   15,   26);
    ZoneId  india = ZoneId.of("Asia/Kolkata"); 
    ZonedDateTime zone1  = ZonedDateTime.of(ldt, india); 
    System.out.println("In India Central Time Zone: " + zone1);
    ZoneId  tokyo = ZoneId.of("Asia/Tokyo"); 
    ZonedDateTime zone2   = zone1.withZoneSameInstant(tokyo); 
    System.out.println("In Tokyo Central Time Zone:"  + zone2);
  }
}

Test it Now

Output:

In India Central Time Zone: 2017-01-19T15:26+05:30[Asia/Kolkata]
In Tokyo Central Time Zone:2017-01-19T18:56+09:00[Asia/Tokyo]

Java ZonedDateTime class Example: getZone()

import java.time.ZonedDateTime;
public class ZonedDateTimeExample3{
  public static void main(String[] args) {
    ZonedDateTime zone =ZonedDateTime.now();
    System.out.println(zone.getZone());
  } 
}

Test it Now

Output:

Asia/Kolkata

Java ZonedDateTime class Example: minus()

import java.time.Period;
import java.time.ZonedDateTime;
public class ZonedDateTimeExample4 {
  public static void main(String[] args) {
    ZonedDateTime zone= ZonedDateTime.now();
    ZonedDateTime m = zone.minus(Period.ofDays(126));
    System.out.println(m);
  } 
}

Test it Now

Output:

2016-09-15T12:54:01.354+05:30[Asia/Kolkata]

Java ZonedDateTime class Example: plus()

import java.time.*;
public class ZonedDateTimeExample5{
  public static void main(String[] args) {
    ZonedDateTime zone= ZonedDateTime.now();
    ZonedDateTime p = zone.plus(Period.ofDays(126));
    System.out.println(p);
  } 
}

Test it Now

Output:

2017-05-25T12:56:12.417+05:30[Asia/Kolkata]

Next TopicJava ZoneId

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Java 8 Date Time

Java Date (Classical)

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Java ZonedDateTime class

Java ZonedDateTime class declaration

Methods of Java ZonedDateTime

Java ZonedDateTime class Example

Java ZonedDateTime class Example: of() and withZoneSameInstant()

Java ZonedDateTime class Example: getZone()

Java ZonedDateTime class Example: minus()

Java ZonedDateTime class Example: plus()

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