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Java Local Development Environments Advanced Tooling Finishing TreeStory

Xiaobao Yu
PLUS
Xiaobao Yu
Courses Plus Student 4,346 Points

I got "java.util.NoSuchElementException" error while trying to complete team work section question.

I applied a scanner in order to get user input. However it popped up with the error shown in the title.

com/teamtreehouse/Main.java
package com.teamtreehouse;

import java.util.Arrays;
import java.util.List;

public class Main {

    public static void main(String[] args) {
        // write your code here
        Prompter promter = new Prompter();
        String story = "Thanks __name__ for helping me out.  You are really a __adjective__ __noun__ and I owe you a __noun__.";
        Template tmpl = new Template(story);
        promter.run(tmpl);
    }
}
com/teamtreehouse/Prompter.java
package com.teamtreehouse;

import java.io.*;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.*;

import static java.nio.file.Files.readAllLines;


public class Prompter {
    private BufferedReader mReader;
    private Set<String> mCensoredWords;

    public Prompter() {
        mReader = new BufferedReader(new InputStreamReader(System.in));
        loadCensoredWords();
    }

    private void loadCensoredWords() {
        mCensoredWords = new HashSet<String>();
        Path file = Paths.get("resources", "censored_words.txt");
        List<String> words = null;
        try {
            words = readAllLines(file);
        } catch (IOException e) {
            System.out.println("Couldn't load censored words");
            e.printStackTrace();
        }
        mCensoredWords.addAll(words);
    }

    public void run(Template tmpl) {
        List<String> results = null;
        try {
            results = promptForWords(tmpl);
        } catch (IOException e) {
            System.out.println("There was a problem prompting for words");
            e.printStackTrace();
            System.exit(0);
        }
        System.out.printf("Your TreeStory:%n%n%s", tmpl.render(results));
    }

    /**
     * Prompts user for each of the blanks
     *
     * @param tmpl The compiled template
     * @return
     * @throws IOException
     */
    public List<String> promptForWords(Template tmpl) throws IOException {
        List<String> words = new ArrayList<String>();
        for (String phrase : tmpl.getPlaceHolders()) {
            String word = promptForWord(phrase);
            words.add(word);
        }
        return words;
    }


    /**
     * Prompts the user for the answer to the fill in the blank.  Value is guaranteed to be not in the censored words list.
     *
     * @param phrase The word that the user should be prompted.  eg: adjective, proper noun, name
     * @return What the user responded
     */
    public String promptForWord(String phrase) {
        Scanner scan = new Scanner(System.in);
        String userOutput = "";
        do {
            System.out.printf("Please enter a %s word: \n", phrase);
            userOutput = scan.next();
        }
        while (mCensoredWords.contains(userOutput));

        return userOutput;
    }
}
pseudo-tests.md
#  This is essentially what I am testing 
1.  The user is prompted for a new string template (the one with the double underscores in it).

  a. The prompter class has a new method that prompts for the story template, and that method is called.

2.  The user is then prompted for each word that has been double underscored.

   a. The answer is checked to see if it is contained in the censored words.
      User is continually prompted until they enter a valid word

3.  The user is presented with the completed story

1 Answer

Yanuar Prakoso
Yanuar Prakoso
15,196 Points

Hi Xiaobao Yu

Basically I think the error is because you have not done the first task mentioned in the pseudo code:

1. The user is prompted for a new string template (the one with the double underscores in it).

** a. The prompter class has a new method that prompts for the story template, and that method is called.**

You still using the default example of story:

String story = "Thanks __name__ for helping me out.  You are really a __adjective__ __noun__ and I owe you a __noun__.";

Instead in the pseudo code you were asked to prompt (ask) the user to input their own story by using the same rules applied to the example.

I hope this will help you a little. Oh By the way since the prompt already declared mReader as BufferedReader you should use it instead of scanner as the user input reader.

I hope this can give some hints to pass the assignment. Please feel free to ask more if you still have a problem related to the task.

Xiaobao Yu
Xiaobao Yu
Courses Plus Student 4,346 Points

Thanks for the answer. That's the missing part.