CODEWITHSUNDEEP
javadatejodatime
user3569530
user3569530

Reputation: 193

joda time, DateTimeFormatter

I have following code 

dateTimeFormat = ISODateTimeFormat.dateTimeNoMillis()

and i use dateTimeFormat below

public static String print(Date value) {
    return dateTimeFormat.print(value.getTime());
}

And now i get problem, in my print method i put many date instances with + 4 hours time, and after dateTimeFormat.print(value.getTime()); i get time with +3 hour, but one of all date instances become with +4 hours, this error for me.

In all date instances has the same time zone Europe/Moscow

What may be wrong in my case?

Upvotes: 0

Views: 225

Answers (2)

Arvind Kumar Avinash
Arvind Kumar Avinash

Reputation: 79550

java.time

The java.util Date-Time API and their formatting API, SimpleDateFormat are outdated and error-prone. It is recommended to stop using them completely and switch to the modern Date-Time API*.

Also, quoted below is a notice from the home page of Joda-Time:

Note that from Java SE 8 onwards, users are asked to migrate to java.time (JSR-310) - a core part of the JDK which replaces this project.

Solution using java.time, the modern Date-Time API:

import java.time.ZoneId;
import java.time.temporal.ChronoUnit;
import java.util.Date;

public class Main {
    public static void main(String[] args) {
        System.out.println(print(new Date()));
    }

    public static String print(Date value) {
        return value.toInstant()
                .atZone(ZoneId.of("Europe/Moscow"))
                .truncatedTo(ChronoUnit.SECONDS)
                .toOffsetDateTime()
                .toString();
    }
}

Output:

2021-06-20T16:18:56+03:00

ONLINE DEMO

Learn more about the modern Date-Time API from Trail: Date Time.

* For any reason, if you have to stick to Java 6 or Java 7, you can use ThreeTen-Backport which backports most of the java.time functionality to Java 6 & 7. If you are working for an Android project and your Android API level is still not compliant with Java-8, check Java 8+ APIs available through desugaring and How to use ThreeTenABP in Android Project.

Upvotes: 2

Jon Skeet
Jon Skeet

Reputation: 1503180

In all date instances has the same time zone Europe/Moscow

A Date instance doesn't have a time zone - it's just an instant in time. But you should probably specify the time zone for your formatter, e.g.

dateTimeFormat = ISODateTimeFormat
    .dateTimeNoMillis()
    .withZoneUTC();

If you want a value which does know about a time zone, you should use DateTime instead of Date.

Upvotes: 2

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