Instruct: Classify Amazon reviews into positive or negative sentiment
Query: If you want to learn JAVA don't do it!!!

Teach yourself Java in 21 days, HA HA HA!!!! If you can understand all about OOP in 21 days then you don't need this book, you need something from SunSoft Books or O'Reilly. If you don't know a lot about this stuff, or you have been out of programming for a while then you won't learn this in 21 days. Gustavo Munoz.