How to use the require keyword

Code Example 1 shows how to use the require keyword to reference or include both third-party and Java platform API libraries.

#Load Java platform and third-party API support using 
#JRuby 0.9.1 and later syntax.
require 'java'
require 'xml-apis-1.3.02.jar'

#Third-party code
...
org.w3c.dom.Element root = g.getRoot()
svgdocument = impl.createDocument(svgNS, "svg", null)
org.w3c.dom.Node node = svgdocument.importNode(root, true) 
...

This code sample is from the article JRuby and the Java Platform.

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