This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
What is your unexpected behaviour? compareTo(String string) in the String class behaves exactly like the equals(Object) method in the same class, the only difference being how it returns that these values are equal.