This week's book giveaway is in the General Computing forum. We're giving away four copies of Arduino in Action and have Martin Evans, Joshua Noble, and Jordan Hochenbaum on-line! See this thread for details.
You don't get that output from the code you posted. But let's suppose that your real code doesn't have anything commented out. You should change it to something that tells you the actual exception, like this:My prediction is that the full error reporting will tell you that a ClassNotFoundException is being thrown. If that is the case, then make sure that the jar file containing the MySQL driver is in your classpath.