Idyllic Java

I'm trying to learn Java, slogging my way through a 1200 page text book. It's a bit like trying to read the bible (I'd imagine). Page 366 is about Interfaces and Polymorphism, and when I read this paragraph for the first time I couldn't help laughing out-loud:

'The DataSet class is usable for analyzing objects of any class that realizes the Measurable interface. A class realizes an interface if it declares the interface in an implements clause, and if it implements the method or methods that the interface requires.'

You wot?!