Keep getting same error.

public static void main(String[] args) {
    Console console = System.console();
    /*  Some terms:
        noun - Person, place or thing
        verb - An action
        adjective - A description used to modify or describe a noun
        Enter your amazing code here!
    */
  String ageAsString = console.readLine("How old are you?  ");
  int age = Integer.parseInt(ageAsString);
  if (age< 13) {
    console.printf("Sorry you must be at least 13 to use this program.\n");
    System.exit(0);
  }
  String name = console.readLine("Enter your name: ");
  String adjective = console.readLine("Enter an adjective: ");
  String noun;
  boolean isInvalidWord;
  do {
    noun = console.readLine("Enter a noun:  ");
    isInvalidWord = (noun.equalsIgnoreCase("dork") || 
                    noun.equalsIgnorCase("jerk"));
  if (isInvalidWord) {
      console.printf("That language is not allowed. Try again. \n\n"); 
  }
} while(isInvalidWord);
  String adverb = console.readLine("Enter an adverb:  ");
  String verb = console.readLine("Enter a verb ending in -ing:");

  console.printf("Your TreeStory:\n--------------\n");
  console.printf("%s is very %s", name, adjective);
  console.printf("They are always %s %s. \n", adverb, verb);
}