title: Selenium WebDriver: Random click a row button
body: <p>How to click a row in table by randomly? 
  I know how to using Random class to iterate the List but don't know how to click the button of the specific row after randomize due to xpath different.</p>
  
  <p>Please provide me some idea and guideline on how to solve this. </p>
  
  <p>ps: I got some idea, the button is located at the last column, so i just click on the last column button. </p>