public static void main(String[] args) {
    if (args.length < 1) usage();
    int rv = 0;
    if (args[0].equals("order")) {
      rv = runorder(args);
    } else if (args[0].equals("wicked")) {
      rv = runwicked(args);
    } else if (args[0].equals("misc")) {
      rv = runmisc(args);
    } else if (args[0].equals("memsize")) {
      rv = runmemsize(args);
    } else {
      usage();
    }
    System.gc();
    System.exit(rv);
  }