This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
I see from your earlier post that you already have driver. You may move it to the folder that is already set in your classpath variable. For instance, you can move it to the directory where you have your other classes that ran fine. Alternatively, you can add the location of your driver to classpath. The following link will help you in setting the classpath. Sometimes IDE (if you are using one) has option to add a folder/jar file to your project. NetBeans has that kind of option and that's what I used