Java String contains method

import java.io.Console;

public class TreeStory {

    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!
        */
      // [Name] is a(n) [adjective] [noun]. They are always [adverb] and [verb]ing. 
      String ageAsString = console.readLine("How old are you?  ");
      int age = Integer.parseInt(ageAsString);
      if (13 < age) {
      //Insert exit code
        console.printf("Sorry, you must be 13 or younger to use this program. \n");
        System.exit(0);
      }
      String name = console.readLine("Enter a name:  ");

      String adjective = console.readLine("Enter an adjective:  ");

      String noun;
      boolean isInvalidNoun;
        do{
        noun = console.readLine("Enter a noun:  ");
         isInvalidNoun =(noun.equalsIgnoreCase("nigger")|| 
                                noun.equalsIgnoreCase("coon")||
                                noun.equalsIgnoreCase("dork")||
                                noun.equalsIgnoreCase("jerk"));
        if (isInvalidNoun) {
        console.printf("That language is not allowed. Frick OFF....lil bih! \n\n");
        }
      } 
        while(isInvalidNoun);

      String adverb; 
      boolean isInvalidAdverb;
          do {
        adverb = console.readLIne("Enter an adverb:  ");
        isInvalidAdverb = (adverb.contains("bitCh"));
          if(isInvalidAdverb){
        console.printf("That language is not allowed. Frick OFF....lil bih! \n\n");
        }
      }
          while(isInvalidAdverb);

      }
      String verb = console.readLine("Enter a verb ending in -ing:  ");

      console.printf("Your TreeStory:\n---------\n");
      console.printf("%s is a(n) %s %s  ", name, adjective, noun);
      console.printf("He is always %s  %s. ", adverb, verb);
    }

}