Gem Version Build Status


RMagick is a Ruby binding to ImageMagick and GraphicsMagick. RMagick4J implements ImageMagick functionality and the C portions of RMagick for use with JRuby.


This project was written by Thomas Palmer, Sergio Arbeo, Thomas Enebo, and Uwe Kubosch with lots of help from the JRuby community.

API docs

You can find the generated API documentation here:




To create a gem you should run rake. The useful targets are

:clean, :compile, :gem, :release, :test (hoe has more -- see hoe docs).

To create a new release, you should:

  • Add new version entry to History.txt
  • Update lib/rmagick4j/version.rb to contain new version
  • rake release