I need some help with JAVA .
I want to write a prog that will constantly read an fpt port.
once it gets a file from there then depending on the name of the file
switch to a particular procedure and do some changes to that file.
The code to do the changes in written in perl which has to be
maintained.

any idea how to go abt this ?
At a time 1 or more files can be read .so do I have to implement
multithreading?