Question 1

How does ThreeTen-Extra compare to Joda-Time?

Accepted Answer

ThreeTen-Extra complements the modern java.time API from JDK 8 with specialized extensions, while Joda-Time is a more comprehensive alternative to the old java.util.Date. If you're on JDK 8+, ThreeTen-Extra integrates better with standard libraries, but Joda-Time might offer broader features for complex date-time scenarios.

Question 2

How to use the YearQuarter class in ThreeTen-Extra?

Accepted Answer

You can create a YearQuarter instance using static methods like YearQuarter.of(year, quarter), then perform operations such as plusQuarters() or atDay(). Refer to the Javadoc for detailed examples and methods tailored for fiscal calculations.

Question 3

Is ThreeTen-Extra production ready?

Accepted Answer

Yes, it has stable releases (e.g., version 1.8.0) and follows semantic versioning, indicating it's suitable for production. However, as a mature project, updates may be less frequent, so it's best for stable, long-term use rather than cutting-edge features.

Question 4

What are the main classes in ThreeTen-Extra?

Accepted Answer

Key classes include DayOfMonth for granular date values, YearQuarter for fiscal period handling, and Interval for time range calculations. These address specific gaps in the standard java.time API, as described in the extended date-time classes feature.

Question 5

How to add ThreeTen-Extra to a Maven project?

Accepted Answer

Add the dependency from Maven Central with groupId org.threeten and artifactId threeten-extra, as shown in the README's Maven snippet. It requires Java SE 8+ and has no external dependencies, making integration straightforward.

Question 6

Does ThreeTen-Extra support time zones?

Accepted Answer

It primarily extends java.time with specialized classes like intervals and quarters, but time zone handling is largely delegated to the standard java.time classes such as ZonedDateTime. For advanced time zone features, you may still rely on core java.time or other libraries.

ThreeTen-Extra

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