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.
Any particular reason why you need an executable? Doing makes your Java app platform specific, unless you supply an executable for each platform. Besides, most Java apps use batch file or shell scripts to start them up - is there a particular reason why you cannot do that?