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Embedding JRuby
Using Java from Ruby is JRuby's best-known feature---but you can also go in the other direction, and use Ruby from Java. There are several different ways to do this. You can execute entire Ruby scripts, call individual Ruby methods, or even implement a Java interface in Ruby (thus allowing you to treat Ruby objects like Java ones). We refer to all these techniques generically as "embedding." This section will explain how to embed JRuby in your Java project.
