ThreeTen-Extra vs iCal4j

ThreeTen-Extra

Provides additional date-time classes that complement those in JDK 8 (by ThreeTen)

Date and Time

Source Code

threeten.org

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iCal4j

A Java library for parsing and building iCalendar data models (by ical4j)

Date and Time Icalendar Scheduling Library Java

Source Code

ical4j.org

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ThreeTen-Extra		iCal4j
	Project
3	Mentions	-
387	Stars	723
0.3%	Growth	2.9%
5.3	Activity	8.0
8 days ago	Latest Commit	3 days ago
Java	Language	Java
BSD 3-clause "New" or "Revised" License	License	BSD 3-clause "New" or "Revised" License

The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

ThreeTen-Extra

Posts with mentions or reviews of ThreeTen-Extra. We have used some of these posts to build our list of alternatives and similar projects.

How to Effectively Test Time-Dependent Code: Unit and Spring-Based Strategies
1 project | /r/java | 10 Jul 2023

The https://www.threeten.org/threeten-extra/ library also has a mutable Clock, along with other useful time-related utilities.
The Java date/time library's a mess.
1 project | /r/badcode | 5 May 2023
What is the main purpose of the new interface java.time.InstantSource?
1 project | /r/java | 15 Sep 2021

See this issue in the threeten-extra library: https://github.com/ThreeTen/threeten-extra/issues/150

iCal4j

Posts with mentions or reviews of iCal4j. We have used some of these posts to build our list of alternatives and similar projects.

We haven't tracked posts mentioning iCal4j yet.
Tracking mentions began in Dec 2020.

What are some alternatives?

When comparing ThreeTen-Extra and iCal4j you can also consider the following projects:

Joda-Time - Joda-Time is the widely used replacement for the Java date and time classes prior to Java SE 8.

Time4J - Advanced date, time and interval library for Java with sun/moon-astronomy and calendars like Chinese, Coptic, Ethiopian, French Republican, Hebrew, Hijri, Historic Christian, Indian National, Japanese, Julian, Korean, Minguo, Persian, Thai, Vietnamese

ThreeTenBP - Backport of functionality based on JSR-310 to Java SE 6 and 7. This is NOT an implementation of JSR-310.

Almanac Converter - A Java-based calendar converter

ThreeTen Android Backport - An adaptation of the JSR-310 backport for Android.

icsx5 - ICSx⁵ is an Android app to subscribe to remote or local iCalendar files (like time tables of your school/university or event files of your sports team).

biweekly - biweekly is an iCalendar library written in Java.