Here are some links to some other resources.
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Several resources are available on the Java website at Sun Microsystems. Most importantly, you can download the latest Java System Development Kit (SDK), and read the Java platform documentation. If you download the Java SDK, be sure to get the latest version.
The certification exam is provided by Sun Educational Services, and is administered through a company called Prometric.
The main page for certification exams from Sun Educational Services provides the link to the Java 2 Platform certification. All pertinent information can be found in the Success Guide for the Sun Certified Programmer for the Java 2 Platform exam.
There are several exam simulators available. In addition to the exam engine that we provide as a bonus, you might want to look at the following: