Java OffsetDateTime.format() Method with Examples

Tags: Java OffsetDateTime Java 8

In this Java core tutorial we learn how to use the java.time.OffsetDateTime.format(DateTimeFormatter formatter) method to format a OffsetDateTime object to a date time String in Java programming language.

How to use OffsetDateTime.format() method

In Java with a given OffsetDateTime object we can use the OffsetDateTime.format(DateTimeFormatter formatter) method to convert a OffsetDateTime object to date time String in specified format.

For example, in the following Java program we use format() method with custom date time format patterns to convert OffsetDateTime object to a specified date time format String.

OffsetDateTimeFormatExample1.java

import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;

public class OffsetDateTimeFormatExample1 {
    public static void main(String... args) {
        OffsetDateTime offsetDateTime = OffsetDateTime.now();

        DateTimeFormatter dateTimeFormatter1 = DateTimeFormatter.ofPattern("dd-MM-yyyy HH:mm:ss Z");
        String offsetDateTimeString1 = offsetDateTime.format(dateTimeFormatter1);

        DateTimeFormatter dateTimeFormatter2 = DateTimeFormatter.ofPattern("dd-MM-yyyy HH:mm:ss X");
        String offsetDateTimeString2 = offsetDateTime.format(dateTimeFormatter2);

        DateTimeFormatter dateTimeFormatter4 = DateTimeFormatter.ofPattern("dd-MM-yyyy HH:mm:ss O");
        String offsetDateTimeString3 = offsetDateTime.format(dateTimeFormatter4);

        System.out.println("dd-MM-yyyy HH:mm:ss Z -> " + offsetDateTimeString1);
        System.out.println("dd-MM-yyyy HH:mm:ss X -> " + offsetDateTimeString2);
        System.out.println("dd-MM-yyyy HH:mm:ss O -> " + offsetDateTimeString3);
    }
}
The output as below.
dd-MM-yyyy HH:mm:ss Z -> 11-05-2022 22:58:17 +0700
dd-MM-yyyy HH:mm:ss X -> 11-05-2022 22:58:17 +07
dd-MM-yyyy HH:mm:ss O -> 11-05-2022 22:58:17 GMT+7

We also can use format() method with predefined DateTimeFormatter constants as below.

OffsetDateTimeFormatExample2.java

import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;

public class OffsetDateTimeFormatExample2 {
    public static void main(String... args) {
        OffsetDateTime offsetDateTime = OffsetDateTime.now();

        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ISO_OFFSET_DATE_TIME;
        String offsetDateTimeString = offsetDateTime.format(dateTimeFormatter);

        System.out.println(offsetDateTimeString);
    }
}
The output as below.
2022-05-11T22:58:44.0705987+07:00

Happy Coding 😊

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