If you are familiar with
java or already did take the scjp1.4, you can build on your experience and use the java Language Spec. & some available books on java tiger, like the one i actually use which is brief and concise but doesnt contain much details. (Java tiger : a develoepr's notebook)
Besides that, If you have some mock exams of scjp1.4 you can use them also but not for a long time, a period of 1-2 days is sufficient to refresh the memory.
SCJP1.4, SCWCD1.4, SCBCD1.3, SCDJWS, SCEA(part1), MCP, MCAD.NET, SCJP 5.0 (beta)