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...0.1) rspec-rails (2.10.1) as follows: jruby -S rspec and got the error: javix at ubuntu:~/Development/rspec_jruby$ jruby -S rspec spec NameError: cannot load Java class com.models.Calculator for_name at org/jruby/javasupport/JavaClass.java:1206 get_proxy_class at org/jruby/javasupport/JavaUtilities.java:34 java_import at file:/home/javix/.rvm/rubies/jruby-1.7.0.preview1/lib/jruby.jar!/jruby/java/core_ext/object.rb:45 map at org/jruby/RubyArray.java:2350 java_import at file:/home/javix/.rvm/rubies/jruby-1.7.0.preview1/lib/jruby.jar!/jruby/java/core_ext/object.rb:...

...EADME.md Error I am getting: hello01 $ rails console Loading development environment (Rails 3.2.12) irb(main):001:0> User.all NameError: cannot load Java class org.apache.derby.jdbc.ClientDriver from org/jruby/javasupport/JavaClass.java:1227:in `for_name'' from org/jruby/javasupport/JavaUtilities.java:34:in `get_proxy_class'' from file:/Users/josephli/.rvm/rubies/jruby-1.7.2/lib/jruby.jar!/jruby/java/core_ext/object.rb:26:in `java_import'' from org/jruby/RubyArray.java:2361:in `map'' from file:/Users/josephli/.rvm/rubies/jruby-1.7.2/lib/jruby.jar!/jruby/java/...