This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
The last modified date is available through lastModified(), but Chinna is right about the creation date. JNI or perhaps an external command line tool is the only way to do this. FileTimes uses JNI as well.
If you decide to program something like this yourself, keep in mind that Windows file creation times are not in milliseconds since January 1st 1970 00:00:00 but in blocks of 100 nanoseconds since January 1st 1601 00:00:00.