MVC GUI framework using JRuby and Swing
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Latest commit 86a49f3 Mar 23, 2015


Monkeybars 1.3.3


Monkeybars is a library that enables you to interface (via JRuby) with and take advantage of Swing without writing any Java directly. Using any editor you like, you create Java GUI elements and Monkeybars takes care of registering event listeners, receiving and handling events, updating your view from a model, etc. Monkeybars makes very few assumptions about your model or the structure of the code in your Java forms so it can be integrated into existing projects with a minimum of hassle.


Needs more spec coverage. But otherwise really quite cool.


Mailing list, downloads and bug reports

The source is hosted on GitHub:

The mailing list is

Issues are on GitHub Tracker: [

Questions or comments? Contact James Britt


Java 1.6, Rake, JRuby 1.7.x


There are three ways to obtain Monkeybars.

  • Source distribution
  • Gem which includes a project generator, ideal for new projects
  • Jar file for integration into existing Java applications

The most current gem can be installed from

sudo gem sources -a


sudo gem i monkeybars ––source


Monkeybars is licensed under the Ruby licence (as on January 2010); see COPYING.txt.


Monkeybars is the work of many contributors.

  • David Koontz - Core contributor, original author, tutorials
  • Logan Barnett - Core contributor, nested views, signals, many bug fixes
  • James Britt - Core contributor, project manager, fixes to documentation, build process, nested view bugs
  • Mario Aquino - Listener registration, Foxtrot integration, many bug fixes and specs

Feed your head.