code: public static void main(String[] args) throws Exception {
          EncryptionUtil util = new EncryptionUtil();
  
          System.out.println("Enter text to encrypt: ");
          BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
          String input = reader.readLine();
          if (null != input && !"".equals(input)) {
              System.out.println("'" + util.encrypt(input) + "'");
          }
      }
docs: This main prompts the user to input a string to be encrypted.
  
  @param args none
  @throws Exception on error