DetectorFactoryCollection.instance();
	public void execute(String[] argv) throws Exception {		int start = 0;		while (start < argv.length && argv[start].startsWith("-")) {			if (argv[start].equals("-category"))				category = argv[1];			else if (argv[start].equals("-brief"))				brief = true;			else				throw new IllegalArgumentException("Unknown option: " + argv[start]);			++start;		}		if (start == argv.length) {			System.err.println("Usage: " + FindExamples.class.getName() +				" [-category <category>]" +				" [-brief]" +				" <results file>");			System.exit(1);		}		DetectorFactoryCollection.instance(); // load plugins		addKeyword("GOOD_EXAMPLE");		addKeyword("EXCELLENT_EXAMPLE");		for (int i = start; i < argv.length; ++i)			scan(argv[i]);	}