JRuby

java-runtime lang

JRuby is a high-performance, stable, fully threaded Java implementation of the Ruby programming language.

Release Schedule Image Gantt Chart for JRuby
Release Ruby Compatibility Required Java Version Released Support Latest
10.1 4.0 21 2 weeks and 4 days ago
(21 Apr 2026)
 Yes 10.1.0.0
(21 Apr 2026)
10.0 (LTS) 3.4 21 1 year ago
(14 Apr 2025)
 Ends in 1 year and 11 months
(01 Apr 2028)
 10.0.5.0
(06 Apr 2026)
9.4 3.1 8 3 years and 5 months ago
(23 Nov 2022)
 Yes 9.4.14.0
(28 Aug 2025)
9.3 2.6 8 4 years and 7 months ago
(22 Sep 2021)
 Ended 1 year and 10 months ago
(26 Jun 2024)
 9.3.15.0
(26 Jun 2024)
9.2 2.5 8 7 years and 11 months ago
(24 May 2018)
 Ended 3 years and 10 months ago
(27 Jun 2022)
 9.2.21.0
(27 Jun 2022)
9.1 2.3 7 10 years ago
(02 May 2016)
 Ended 8 years ago
(20 Apr 2018)
 9.1.17.0
(20 Apr 2018)
9.0 2.2 7 10 years ago
(21 Jul 2015)
 Ended 10 years ago
(30 Jan 2016)
 9.0.5.0
(30 Jan 2016)

JRuby does not publish a formal end-of-life policy. In practice, the JRuby team typically focuses maintenance on the most recent major release line, with occasional patch releases for the previous line while users migrate. Each major JRuby version targets a specific MRI Ruby language level:

JRuby Ruby compatibility Minimum Java
10.1 4.0 21
10.0 3.4 21
9.4 3.1 8
9.3 2.6 8
9.2 2.5 8
9.1 2.3 7
9.0 2.2 7
1.7 1.9 / 2.0 / 2.1 6

More information is available on the JRuby website.

You should be running one of the supported release numbers listed above in the rightmost column.

jruby --version

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