}
    public static void main(String av[]) {        CatFile c = new CatFile();        if (av.length == 0) {            c.process(new BufferedReader(					new InputStreamReader(System.in)));		else for (int i=0; i<av.length; i++)			try {				c.process(new BufferedReader(new FileReader(av[i])));			} catch (FileNotFoundException e) {				System.err.println(e);			}