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.
Not sure. First you need to visit the WL documentation to see if it is approved for usage with Java 5. This would be my preference. Compiling involves rebuilding all of the class files using the Java 1.4 compiler rather than Java 5