The book does not specifically address the problems of Java programmers starting to write Clojure, or even how to introduce Clojure into your Java shop. However, the book does two things which relate to your questions:
1. We go into details of Java-Clojure interop, so that a Java programmer knows how to import and use Java libraries or create classes, instances, proxies, etc from Clojure that he is already familiar with.
2. We talk a lot about how Clojure favors immutability, how this is different from other languages (Java included), and what that means when trying to write programs "the Clojure way."
I was not a Java programmer before I came to Clojure so I can't really say what I experienced unlearning Java; however immutability in particular really seems to trip most people up regardless of their previous programming experience. Some Clojure people I know with more Java experience tell me this article helped them to understand the difference a bit better and carry some Clojure lessons back to Java, too.