Abstract: Josh Bloch presents eight programming puzzles for your entertainment and enlightenment. The game show format keeps you on your toes while the puzzles teach you about the subtleties of the Java programming language and its core libraries. Anyone with a working knowledge of the language will be able to understand the puzzles, but even the most seasoned veterans will be challenged. The lessons you take from this session will be directly applicable to your programs and designs. This talk will consist of some of the best puzzles from the first six Puzzlers talks, and some brand new ones.