Hi and welcome to JavaRanch. Please read the FAQ's.
Great start learning. I (and many others) recommend the book: Sun Certified Programmer for Java 6 by Kathy Sierra and Bert Bates.
What is SCAP? Do you mean SCJA? Because there are no prerequisites for SCJP.
"Any fool can write code that a computer can understand. Good programmers write code that humans can understand." --- Martin Fowler
Please correct my English.