What is DurationFormatUtils.formatDurationISO() in Java?

What is DurationFormatUtils.formatDurationISO() in Java? Answer

Overview

formatDurationISO() is a static method of the DurationFormatUtils class that is used to convert the time gap in milliseconds to ISO 8601 period format.

How to import `DurationFormatUtils`

The definition of DurationFormatUtils can be found in the Apache Commons Lang package, which we can add to the Maven project by adding the following dependency to the pom.xml file.

<dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.12.0</version>
</dependency>

For other versions of the commons-lang package, refer to the Maven Repository.

You can import the DurationFormatUtils class as follows.

import org.apache.commons.lang3.time.DurationFormatUtils;

Syntax

public static String formatDurationISO(final long durationMillis)

Parameters

final long durationMillis: The time gap in milliseconds to format.

Return value

This method returns the formatted duration.

Code

The code below shows how the formatDurationISO() works in Java.

import org.apache.commons.lang3.time.DurationFormatUtils;

public class Main{

    public static void main(String[] args) {
        // Example 1
        long durationMillis = 1234542;
        System.out.printf("DurationFormatUtils.formatDurationISO(%s) = %s", durationMillis, DurationFormatUtils.formatDurationISO(durationMillis));
        System.out.println();

        // Example 2
        durationMillis = 0;
        System.out.printf("DurationFormatUtils.formatDurationISO(%s) = %s", durationMillis, DurationFormatUtils.formatDurationISO(durationMillis));
        System.out.println();

    }
}

Output

The output of the code will be as follows:

DurationFormatUtils.formatDurationISO(1234542) = P0Y0M0DT0H20M34.542S
DurationFormatUtils.formatDurationISO(0) = P0Y0M0DT0H0M0.000S

Explanation

Example 1

duration in milliseconds - 1234542

The method returns P0Y0M0DT0H20M34.542S, i.e., the formatted duration in milliseconds to ISO 8601 period format.

Example 2

start milliseconds - 0
end milliseconds - 12321

The method returns P0Y0M0DT0H0M12.321S, i.e., the formatted duration in milliseconds to ISO 8601 period format.

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