Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't buy this book

Contrary to what some people are saying here, it does have a section on File I/O, but I agree that the mock exam is NOT useable.The code isn't indented, making it almost impossible to read. The Review mode of the exam (where the answers should normally be given) doesn't work at all and although they offer a fix (for what?) on their web site it doesn't work.If you need mock exams get jq+ and check out javaranch.com. The book itself seems to be ok, but I am less than impressed and regret this purchase.