Reading in a file.

[MrScruff]

Ive been given this code as part of a lexical analyser for which i will be coding a syntax analyser - however the file the lexical analyser will be reading will come throught this code:

public static void main(String[] args) throws IOException
        {
        BufferedReader din = new BufferedReader(new  InputStreamReader(System.in)) ;
        System.err.print("file? ") ;
        System.err.flush() ;
        String fileName = din.readLine().trim() ;
        LexicalAnalyser lex = new LexicalAnalyser(fileName) ;
    } // end of class LexicalAnalyser

The thing is - where is the path name meant to go? It works by replacing fileName however im not so sure why my lecturer has coded the bufferedreader and inputstreamreader :S

[Phaelax]

You type in the filename and path from the console when you run th code. Isn't that what System.in is? I don't know I've never used it.

[jwenting]

yup. What I find rather troublesome is that he uses System.err for non-error output...
It would be much preferred to read the inputfile through the commandline.