Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Outdated now, good if you're two years behind on JDK, though.

Looks like a good tutorial book - however, it's now several generations out of date, which is a problem. Sun keeps updated copies of the books on line, but the limits of printing mean that the bound volumes don't get updated. This covers Java JDK 1.2 - NOT JAVA JDK 5 (the current release). Since there are significant changes between the revisions, this is of limited utility these days.