public String toString(I18N i18n, String dftVal) {
   String dv = (dftVal != null) ? dftVal : this.dft;
   if (i18n != null) {
     return i18n.getString(this.getKey(), dv);
   } else {
     return I18N.decodeNewLine(dv);
   }
 }
  /** ** Debug/Testing entry point ** @param argv The command-line args */
  public static void main(String argv[]) {
    RTConfig.setCommandLineArgs(argv);

    if (RTConfig.hasProperty(ARG_PACKAGE)) {
      String pkg = RTConfig.getString(ARG_PACKAGE, "org.opengts.util");
      String loc = RTConfig.getString(ARG_LOCALE, "en");
      String key = RTConfig.getString(ARG_KEY, "");
      Locale locale = I18N.getLocale(loc);
      Print.sysPrintln("Package: " + pkg);
      Print.sysPrintln("Locale : " + locale + " [" + loc + "]");
      Print.sysPrintln("Key    : " + key);
      I18N i18n = I18N.getI18N(pkg, locale);
      if (i18n != null) {
        Print.sysPrintln("String : " + i18n.getString(key, "Undefined"));
      } else {
        Print.sysPrintln("Package resource not found");
      }
      System.exit(0);
    }

    if (RTConfig.hasProperty("test")) {
      I18N i18n = getI18N(I18N.class, null);
      i18n.printKeyValues();
      String m3 =
          i18n.getString(
              "m.m3",
              "{0}",
              new Object() {
                public String toString() {
                  return mainStr;
                }
              });
      String m2 = i18n.getString("m.m2", "How Now Brown {0}", m3);
      String m1 = i18n.getString("m.m1", "Message: \\n{0}", m2);
      Print.sysPrintln(m1);
      mainStr = "Horse";
      Print.sysPrintln(m1);
    }
  }