how to SFTP using Java

hi
I'm fairly new to SFTP. I download the client and tried a few connections, it works great. However I have a Java Applet that allows the users to create a file and this file needs to be sftped to another server. Do you have any code samples? or Book References?

Thanks so much
Gigi

I do not know if Java has some SFTP library. Also I have never read any book on SFTP, only RFC. You may use scripting functionality of WinSCP to upload the file using it.