Closures, builders, constructs such as these can save you some time, once you learn groovy. 

How much time is debatable, because I don't type a lot even when I'm writing Java. Once I define something in Java it's two characters and control space in the IDE, I never type it again. I don't even type it the first time, usually everything is just named a close variation of the class name, which the IDE does for me, with control-space. But already I digress.  Read more »