I'm having trouble figuring out how to implement my "throws IOException".
Whenever I am closing my filechannels and filestreams, its telling me IOException must be caught or declared to be thrown.

finally {
fcin.close() ;
fcout.close();
istream.close();
ostream.close();
} else {
System.out.println( "Provide input and " +
"output filenames" );
}

on the throws IOException, i had that problem too, and because i am implementing ActionListener i can not add throws to the method. So to get around this i put all the close methods in another try-catch. so I have something like
finally{
try{
the close stuff
} catch IOException(object)
{ a message}
}

What is this try-catch suppose to do any ways? I don't understand how adding another try-catch would work.

Got this project 4 to run, finally. I didn't put the finally clause in it, just the try and catch. Pretty much after I got my GUI up, I added some button listeners and added project 2 codes to it. Changed the args to a varible that reads what the user input. Had the same problem as Chad with the finally causing errors but once I got rid of it, the code worked fine. Don't know if the finally is important. It might come back and bite me later down the road for not understanding how to use.