Convert LocalDateTime to OffsetDateTime in Java

June 25, 2022

Convert LocalDateTime to OffsetDateTime in Java

This tutorial shows how to convert java.time.LocalDateTime to java.time.OffsetDateTime in Java.

OffsetDateTime in Java

OffsetDateTime is a date-time with an offset from UTC/Greenwich in the ISO-8601 calendar system, such as 2020-12-07T11:45:20+05:30.

Convert LocalDateTime to OffsetDateTime Java Program

If you have a LocalDateTime instance you just need to combine it with an offset to create an OffsetDateTime.

If you want to combine offset for the same default locale for which you have a LocalDateTime then you can do it like this.

import java.time.LocalDateTime;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;

public class LocalToOffset {
  public static void main(String[] args) {
    LocalDateTime localDateTime = LocalDateTime.now();
    System.out.println("LocalDateTime is: " + localDateTime);
    ZoneOffset zoneOffSet = OffsetDateTime.now().getOffset();
    System.out.println("ZoneOffset is: " + zoneOffSet.toString());
    OffsetDateTime offsetDateTime = localDateTime.atOffset(zoneOffSet);
    System.out.println("OffsetDateTime is: " + offsetDateTime);
  }
}

Output

LocalDateTime is: 2020-12-09T16:36:36.616370500
ZoneOffset is: +05:30
OffsetDateTime is: 2020-12-09T16:36:36.616370500+05:30

If you want to combine Zoneoffset for any specific zone id then you can get the ZonedDateTime by passing the zoneId and OffsetDateTime from that ZonedDateTime.

import java.time.LocalDateTime;
import java.time.OffsetDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;

public class LocalToOffset {
  public static void main(String[] args) {
    ZoneId zoneId = ZoneId.of("America/Chicago");
    LocalDateTime localDateTime = LocalDateTime.now();
    System.out.println("LocalDateTime is: " + localDateTime);
    ZonedDateTime zonedDateTime = localDateTime.atZone(zoneId);
    System.out.println("ZonedDateTime is: " + zonedDateTime);
    OffsetDateTime offsetDateTime = zonedDateTime.toOffsetDateTime();
    System.out.println("OffsetDateTime is: " + offsetDateTime);
    
    // Same thing can also be done in a single line
    offsetDateTime = localDateTime.atZone(ZoneId.of("America/Chicago")).toOffsetDateTime();
  }
}

Output

LocalDateTime is: 2020-12-09T17:08:14.425502600
ZonedDateTime is: 2020-12-09T17:08:14.425502600-06:00[America/Chicago]
OffsetDateTime is: 2020-12-09T17:08:14.425502600-06:00

That's all for the topic Convert LocalDateTime to OffsetDateTime in Java. If something is missing or you have something to share about the topic please write a comment.

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June 25, 2022