This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Note that in the first statement you are declaring a variable of type InputVars and then setting it equal to the result of calling the constructor InputVars(). In the second statement you are ONLY declaring a variable which is an array of InputVars. You did not initialize it with any value.
"JavaRanch, where the deer and the Certified play" - David O'Meara