Filter filter = new Filter(argv[0]);
new Filter(argv[0]);
	public static void main(String[] argv) {		try {			if (argv.length != 1) {				System.err.println("Usage: " + Filter.class.getName() + " <filename>");				System.exit(1);			}			Filter filter = new Filter(argv[0]);		} catch (Exception e) {			e.printStackTrace();			System.exit(1);		}	}