Review

class Messages {
    /**
     * Retrieves a message which takes 1 character argument.
     * 
     * @param msg
     *            String the key to look up.
     * @param arg
     *            char the character to insert in the formatted output.
     * @return String the message for that key in the system message bundle.
     */
    static public String getString(String msg, char arg) {
        return getString(msg, new Object[] { String.valueOf(arg) });
    }

}