Required Explaination of Java Methods related to Selenium RC Automation Functional testing.

http://functionaltestautomation.blogspot.com/2009/10/dataprovider-d...
this link contain all that i  required.
i configured every thing within requirement using eclipse tool for the 'Selenium Automation tool test'
about selenium tool.
Please open the link, for help videos about selenium test tool at the end of that page
i don't have much idea about JAVA language but this example used different jar and java
files to create packages or unit and the code need to run using JUnit or TestNG mode.

The thing that i need is explanation about the methods that are used in this test and the flow of all the methods in this test.

Thanks.