LINKS:
> Link to flosc (java server) download: http://www.benchun.net/flosc/
> Link to flosc setup tutorial: http://transmote.com/flosc/

Main excerpt from the tutorial (this should get you running the server; after that just press "connect" when you open the swf file):

"
Gateway java server:
the backbone of flosc is its java server. the java server is centered around a class called 'Gateway'. Gateway sets up 'OSCServer', which sends and receives UDP data, 'TCPServer', which sends and receives TCP data, and routes all data through these servers.

the flosc download contains a number of java .class (compiled) and .java (source) files. place these files in the same folder, wherever you wish; the location does not matter as long as all of the .class files are together in the same folder.

the flosc download also includes an .fla file, with all of the actionscript functions used by flosc. those are discussed in the next section.

Gateway can be run in a DOS shell on windows, or in Terminal on macOSX. the first step in using flosc is to start Gateway:

step one: open a command prompt
on windows:

open a DOS prompt. (Start>Run, type command (98/ME) or cmd (NT/2000/XP))
type cd\ and the full path of the directory into which you placed the .class files, and press ENTER. (i.e.: cd\Progra~1\flosc\gateway\)

on macOSX:
open a Terminal window (you can find Terminal in Applications).
type "cd " (note the space!) and drag the folder into which you placed the .class files into the Terminal window, and press ENTER.
step two: run Gateway
(both windows and mac)
type java Gateway [oscPort] [flashPort] and press ENTER, where [oscPort] is the number of the port used to send OSC data from outside of flash, and [flashPort] is the number of the port used to send data from within flash. the defaults used in flosc's documentation and examples are ports 1250 and 3000; if these do not interfere with any other programs, they should be fine. generally, any port number over 1000 is safe. (i.e.: java Gateway 1250 3000)
"