Source for ftp classes?

[Siegfried Heintze]

Previously someone (in this forum) pointed me to some ftp client classes.
Now I am curious how a client FTP works. Does anyone have source code? I get the impression that the standard URL class is not of much help and you have to use sockets implement a FTP client.
Thanks,
Siegfried

[Sean Sullivan]

Try this:
http://jakarta.apache.org/commons/sandbox/net/