Help with extra credit stage 3 - using method on string called contains

Sorry for the lack of clarity!

I was thinking of something like this to avoid the logical OR repetition. You could have a master String of things you don't want to see. Like this:

String badWords = "nerd dork jerk lame";
badWords.contains(noun.toLowerCase());

And yes Ken Alger I only intended what we learned in the course, along with these two methods! Nice instinct!

btw Ken, you are an amazing moderator! Thanks for all your help!

Izzy;

Extra Credit

Task 1

There is a method on string called contains. It checks to see if one string is contained within the other. This seems like a good way to build a master list of words that are not allowed. Why don't see if what they typed is in a long string of bad words.

In looking at this we are told about a method called contains. If we look at the Java documentation on Strings, the contains method returns a boolean value and returns true if and only if this string contains the specified sequence of char values.

We should, therefore be able to do something like:

isInvalidWord = (noun.contains(word));

If we then define our String word outside the do...while block thusly,

String word = "nerd";

The checker would look for words like "nerd", "nerdly", "nerdmeister", etc.

The Extra Credit wants to check for a long string of bad words. I'll let you interpret that as you see fit.

Task 2

After you get that working, attempt to take case into account. If your list of bad words that you maintain is all lower cased, you can check the lower case version of the input in the bad string. How do you make a string lowercase?

There are a couple of options here, but this shouldn't give you too much trouble if you are comfortable with Java methods. There are actually a few different approaches.

Happy coding,

Ken

Craig, no worries i got it to work...thanks

Hi Ken -

Didn't use anything yet - I'm stuck at were I'd use contains and the proper syntax for it. Here's what we have so far - the goal is to have it look through the strings in Contains and give the "That language is not allowed" message if there are any matches.

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!
        */
      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.equalsIgnoreCase("jerk"));
        if (isInvalidWord) {
          console.printf("That language is not allowed. Try again. \n\n");  
        }
        } while(isInvalidWord);
      String adverb = console.readLine("Enter an adjective  ");
      String verb = console.readLine("Enter a verb ending in -ing:  ");

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

}

Thanks so much Ken. Will go through it tomorrow. One issue is that the link to java/oracle documentation was giving me an error. (https://docs.oracle.com/javase/7/docs/api/java/lang/String.html) saw you linked to that too... hopefuly it's back up soon.

Izzy

Ken

1. For some reason that link to java (in chrome) is https which returns an error. Changing to http solved that

2. Was able to create method that will not allow any variation of the string to pass. Am not able to figure out how to add more words to that string though. What I have so far:

String word = "nerd";

1. Would you be able to explain why for noun we had to define it within the do, however word is defined outside the do and that does not create a scoping issue.

Thanks again!

Thanks Ken and Craig. Still slightly confused but much more ahead than before these answers. Starting java objects class now, hope that clarifies things further.

What is the scope of this code? Eliminate the ||(Or) statements all together? An example here would be nice?

I struggled with this one for hours, but I refused to quit until I got it.

I kept trying to put what I have below outside of the do syntax when it was obviously supposed to go inside.

isInvalidWord = (noun.contains(badWord));

Anyway, here is my working code for the first problem if anyone is still having trouble.

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:
        */
        String ageAsString = console.readLine("How old are you?  ");
        int age = Integer.parseInt(ageAsString);
        if (age < 13) {
          //Insert exit code
          console.printf("Sorry you must be at least 13 to use this program.\n");
          System.exit(0);
        }  

        String name = console.readLine("Tell me your name:  ");
        String adjective = console.readLine("Do you even know what a adjective is?  Prove it:  ");
        String noun;


        String badWord = "nerd";
        boolean isInvalidWord;
        do {
          noun = console.readLine("Do one of 'dem 'dere nouns:  ");
          isInvalidWord = (noun.contains(badWord));

          if (isInvalidWord) {
            console.printf("That language is not allowed.  Try again. \n\n");
          }
        } while(isInvalidWord);        
        String adverb = console.readLine("How 'bout a good 'ol adverb?:  ");
        String verb = console.readLine("Verb!  Do it now!:  ");

        console.printf("%s is a %s %s.  ", name, adjective, noun);
        console.printf("They are always %s %s.", adverb, verb);
    }
}