This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
What version of the JDK are you using? I think what Rob suggested should work although I'd read up on the javadoc for using getResource(), I think you actually want getResource("/lib") or just getResource("lib")