Java Date Time - ZonedDateTime Example

Example

The following code shows how to parse ZonedDateTime from string.

import java.time.ZonedDateTime;

public class Main {
  public static void main(String[] args) {
    ZonedDateTime dateTime = ZonedDateTime.parse("2007-12-03T10:15:30+01:00[Europe/Paris]");
    System.out.println(dateTime);
  }
}

The code above generates the following result.

Example 2

The following code shows how to change date from one timezone to another timezone.

/*from  w  w w .  j  a v  a  2s  .  c  o m*/
import java.time.LocalDateTime;
import java.time.Month;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;

public class Main {
  public static void main(String[] args) {
    DateTimeFormatter format = DateTimeFormatter
        .ofPattern("MMM d yyyy  hh:mm a");
    LocalDateTime leaving = LocalDateTime.of(2013, Month.JULY, 20, 19, 30);

    // Leaving from San Francisco on July 20, 2013, at 7:30 p.m.

    ZoneId leavingZone = ZoneId.of("America/Los_Angeles");
    ZonedDateTime departure = ZonedDateTime.of(leaving, leavingZone);

    String out1 = departure.format(format);
    System.out.printf("LEAVING:  %s (%s)%n", out1, leavingZone);

    // Flight is 10 hours and 50 minutes, or 650 minutes
    ZoneId arrivingZone = ZoneId.of("Asia/Tokyo");
    ZonedDateTime arrival = departure.withZoneSameInstant(arrivingZone)
        .plusMinutes(650);

    String out2 = arrival.format(format);
    System.out.printf("ARRIVING: %s (%s)%n", out2, arrivingZone);

  }
}
/*
 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

The code above generates the following result.

Example 3

How to find out the time in Los Angeles when it is June 21 14, 2014 16:30 in Chicago.

We can use the withZoneSameInstant(ZoneId newZoneId) method of the ZonedDateTime class.

import java.time.LocalDateTime;
import java.time.Month;
import java.time.ZoneId;
import java.time.ZonedDateTime;
//from   w w  w  .j  ava 2 s .c o  m
public class Main {
  public static void main(String[] args) {
    LocalDateTime  ldt = LocalDateTime.of(2014, Month.JUNE,  21,   16,   30);

    ZoneId  usCentral = ZoneId.of("America/Chicago"); 
    ZonedDateTime zdt   = ZonedDateTime.of(ldt, usCentral); 
    System.out.println("In US  Central Time Zone:"  + zdt);

    ZoneId  losAngeles = ZoneId.of("America/Los_Angeles"); 
    ZonedDateTime zdt2   = zdt.withZoneSameInstant(losAngeles); 
    System.out.println("In  America/Los_Angeles Time Zone:"  + zdt2);
    
  }
}

The code above generates the following result.

Java Date Time - ZonedDateTime Example

Example

Example 2

Example 3

Method