calling JRuby from Java example

CallJRuby.java

import org.jruby.Ruby;
import org.jruby.runtime.Helpers;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.javasupport.JavaUtil;
import org.jruby.RubyClass;
import org.jruby.RubyModule;

public class CallJRuby {
  private static final Ruby __ruby__ = Ruby.getGlobalRuntime();

  public static void main(String[] ARGV) {
    // load script
    String bootstrap = "require './myrubyclass'";
    __ruby__.evalScriptlet(bootstrap);

    // retrieve namespaced class using getClassFromPath, instantiate object, call method
    RubyModule rclass = __ruby__.getClassFromPath("MyRubyModule::MyNamespacedRubyClass");
    IRubyObject param = JavaUtil.convertJavaToRuby(__ruby__, "test string1");
    IRubyObject robject = Helpers.invoke(__ruby__.getCurrentContext(), rclass, "new", param);
    System.out.println(Helpers.invoke(__ruby__.getCurrentContext(), robject, "str"));

    // retrieve root class using getClassFromPath, instantiate object, call method
    rclass = __ruby__.getClassFromPath("MyRootRubyClass");
    param = JavaUtil.convertJavaToRuby(__ruby__, "test string2");
    robject = Helpers.invoke(__ruby__.getCurrentContext(), rclass, "new", param);
    System.out.println(Helpers.invoke(__ruby__.getCurrentContext(), robject, "str"));

    // retrieve root class using getClass, instantiate object, call method
    rclass = __ruby__.getClass("MyRootRubyClass");
    param = JavaUtil.convertJavaToRuby(__ruby__, "test string3");
    robject = Helpers.invoke(__ruby__.getCurrentContext(), rclass, "new", param);
    System.out.println(Helpers.invoke(__ruby__.getCurrentContext(), robject, "str"));
  }
}

my_ruby_class.rb

module MyRubyModule
  class MyNamespacedRubyClass
    attr_reader :str

    def initialize(str)
      @str = str
    end
  end
end

class MyRootRubyClass
  attr_reader :str

  def initialize(str)
    @str = str
  end
end

run.sh

javac -cp <path_to_jruby_jars>/jruby-core-1.7.4.jar CallJRuby.java
java -cp <path_to_jruby_jars>/*:. CallJRuby

This is based on what jrubyc generates. This seems to work ok but I am wondering how this compares to all the other examples found on the JRuby wiki. Are there reasons to prefer or not this API usage style?

https://github.com/jruby/jruby/wiki/AccessingJRubyObjectInJava
https://github.com/jruby/jruby/wiki/JavaIntegration
https://github.com/jruby/jruby/wiki/DirectJRubyEmbedding