This book describes the standard Java interfaces that make portable object-oriented access to relational databases possible, and offers a robust model for writing applications that are easy to maintain It intацвялroduces the JDBC and RMI packages and usesthem to develop three-tier applications (applications divided into a user interface, an object-oriented logic component, and an information store) But the book's key contribution is a set of patterns that let developers isolatбжжбдe critical tasks like object creation, information storage and retrieval, and the committing or aborting of transactions The second edition includes more basics of JDBC and SQL, with more examples, and a deeper discussion about the architecture of a robust, maintainable database application.