Thanks.can it be used to break a file into suitable packets?

The course assignment might have restrictions on use of third-party
libraries. After all, with the right third party libraries a LOT of
assignments of this nature may reduce to a trivial

public static void main (String [] args) {
    Foo foo = new Foo();
    foo.bar();
}

Mind you, creating a client *and* a server probably requires at least
two of the above, no matter what library you use...:)

(Remember that it's possible, using the *core Java libraries only*, to
make a very crude but semifunctional Web browser in a handful of lines
of code, most of which call into Swing and instantiate a window with an
HTML-rendering text pane class buried somewhere in javax.*...yes, a Web
browser! I wouldn't be surprised if J2EE adds the capability for a
three-liner to be a basic but functional HTTP server. If JMF is at all
comparably-capable for media services, it isn't hard to extrapolate.)