java.lang.OutOfMemoryError: Java heap space error with Teamwork challenge

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
    at java.util.Arrays.copyOf(Arrays.java:3236)
    at java.io.ByteArrayOutputStream.grow(ByteArrayOutputStream.java:118)
    at java.io.ByteArrayOutputStream.ensureCapacity(ByteArrayOutputStream.java:93)
    at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:153)
    at java.io.PrintStream.write(PrintStream.java:480)
    at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:221)
    at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:291)
    at sun.nio.cs.StreamEncoder.flushBuffer(StreamEncoder.java:104)
    at java.io.OutputStreamWriter.flushBuffer(OutputStreamWriter.java:185)
    at java.io.PrintStream.write(PrintStream.java:527)
    at java.io.PrintStream.print(PrintStream.java:669)
    at java.io.PrintStream.println(PrintStream.java:806)
    at com.teamtreehouse.Prompter.promptForWord(Prompter.java:108)
    at com.teamtreehouse.Prompter.promptForWords(Prompter.java:88)
    at com.teamtreehouse.Prompter.run(Prompter.java:46)
    at com.teamtreehouse.Main.main(Main.java:16)
    at JavaTester.run(JavaTester.java:77)
    at JavaTester.main(JavaTester.java:39)

public String promptForWord(String phrase) throws IOException
    {
        boolean censored = false;
        String replacement;
        do
        {

            System.out.println(String.format("Enter a replacement for %s: ", phrase);
            replacement = mReader.readLine();

            if (mCensoredWords.contains(replacement))
            {
                System.out.println("That is a censored word! Please enter an uncensored word.");
                censored = true;
            }

        } while (censored);

        return replacement;
    }

package com.teamtreehouse;

public class Main
{

    public static void main(String[] args)
    {

        Prompter prompter = new Prompter();
        String story = prompter.promptForTemplateString();
        Template tmpl = new Template(story);

        prompter.run(tmpl);


    }
}

package com.teamtreehouse;

import java.io.*;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;


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 = Files.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);
        }

        String result = tmpl.render(results);
        System.out.printf("Your TreeStory:%n%n%s", result);
    }

    public String promptForTemplateString()
    {
        System.out.println("Please enter the template (__word__):");

        try
        {
            return mReader.readLine();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }

        return "";

    }

    /**
     * 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) throws IOException
    {
        boolean censored = false;
        String replacement;
        do
        {

            System.out.println("Enter a replacement for " + phrase + ":");
            replacement = mReader.readLine();

            if (mCensoredWords.contains(replacement))
            {
                System.out.println("That is a censored word! Please enter an uncensored word.");
                censored = true;
            }

        } while (censored);

        return replacement;
    }
}

package com.teamtreehouse;

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;


public class Template
{
    /**
     * The string format that is waiting to receive values
     */
    private String mCompiled;
    private List<String> mPlaceholders;

    /**
     * @param text A template with double underscored surrounded placeholders. eg: Hello __name__!
     */
    public Template(String text)
    {
        // Match on double underscore surrounded words, like __name__ or __proper noun__
        Pattern pattern = Pattern.compile("__([^__]+)__");
        Matcher matcher = pattern.matcher(text);
        mPlaceholders = new ArrayList<String>();
        while (matcher.find())
        {
            String label = matcher.group(1);
            mPlaceholders.add(label);
        }
        mCompiled = matcher.replaceAll("%s");
    }


    /**
     * @return Ordered names of placeholders in the template
     */
    public List<String> getPlaceHolders()
    {
        return mPlaceholders;
    }


    /**
     * Given a list of values, replaces the fill in the blanks in order.
     *
     * @param values The replacements for the fill in the blank
     * @return The filled out TreeStory
     */
    public String render(List<String> values)
    {
        // String.format accepts the templates and Object... (a variable amount of objects)
        return String.format(mCompiled, values.toArray());
    }
}