1 An example 2 Accessing and Importing Java Classes 2.1 Require a jar file to make resources in the jar discoverable within JRuby 2.2 Naming a Java Class 2.3 Import a Java Class to Use It Without The Full Path Name 2.4 Use include_package within a Ruby Module to import a Java Package 2.5 Gotchas 3 Calling a Java Method 3.1 Alternative Names and Beans Convention 3.2 Beware of Java generics