The exam for the Sun Certified Programmer for Java 2 (SCPJ2) Platform has changed considerably since the first edition of this book was published. The most noticeable change in the current version of the exam (SCPJ2 1.4) is the removal of GUI and I/O, and the shifting of emphasis toward the core features of the language. In our opinion, the new exam demands an even greater understanding and actual experience of the language, rather than mere recitation of facts. Proficiency in the language is the key to success.
The I/O and GUI topics of the first edition have been eliminated, as they have no relevance for the SCPJ2 exam. These topics are more relevant for the Sun Certified Developer for Java 2 (SCDJ2) Platform exam and, therefore, relegated to a possible future volume on the Developer exam topics.
Since the emphasis of the SCPJ2 exam is on the core features of Java, the second edition provides an even greater in-depth coverage of the relevant topics. The book covers not just the exam objectives, but also supplementary topics that aid in mastering the exam topics.
The second edition is still a one-source guide for the SCPJ2 exam: it provides a mixture of theory and practice for the exam. Use the book to learn Java, pass the SCPJ2 exam, and afterwards, use it as a handy language guide. The book also has an appendix devoted to the SCPJ2 Upgrade exam. To facilitate preparation for the exams, the second edition comes with a CD containing additional resources, including several mock exams developed by Whizlabs Software.
We have taken into consideration the feedback we have received from readers. The many hours spent in handling the deluge of e-mail have not been in vain. Every single e-mail is appreciated and is hereby acknowledged.
Preparing the second edition dispelled all our illusions about second editions being, to put it colloquially, a piece of cake. Every sentence from the first edition has been weighed carefully, and not many paragraphs have escaped rewriting.
UML (Unified Modeling Language) is also extensively employed in this edition. Numerous new review questions have been added. In covering the new topics and expanding the existing ones, new examples, figures, and tables were also specifically created for the second edition.