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.
Just because the language specification provides no way to do it. I suppose the logic was that if you need to do anything that complicated, then it's worth creating a class with a name. Anonymous classes are supposed to be tiny one-liners -- anything larger belongs in a named class.