Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Book to learn Java

Head First Java is a great book to learn Java. The book has a very interesting teaching concept that make the material stick in your brain. I would recommend beginners to try and type in every sample codes and exercises in the book. If you want to be good with Java, you have to practice and practice. Reading only is not enough! On the bad side, the book has some typos with the sample codes.