A good book: Agile Java

This is a book for Java programming.
It is written well, and the principles are described in simple language.
It is like the book "Thinkin in Java".
It is not like the book of some China's professors of the most famous universities, with so many deep theory, they write books to display their knowledge. The fact is that they have not mastered the principle, so they cannot tell them out with the simplest language!
If you are a Java learned, whether a new learner, or a master, you can read this book!