public static void main(String args[]) throws Exception { CLI cli = new CLI(); CommandLine cl = cli.getCommandLine(args); if (!cl.hasOption(CLI.O_ACTION)) { cli.usage(new ParseException("missing required option " + CLI.O_ACTION), true); } String action = cl.getOptionValue(CLI.O_ACTION); if ("dump".equals(action)) { doDump(cl); } else if ("check".equals(action)) { doCheck(cl); } else { cli.usage(new ParseException("invalid option " + action), true); } }