This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
You now know how to copy one file to another. Copying a file to a folder simply means creating a new File object based on the two:
Combine that with File.listFiles() and you should be able to handle it.