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Java Local Development Environments Advanced Tooling Refactoring

Refactoring challenge, HELP!!

"Use the rename refactoring to name the Queue from mSongQueue to mSongRequestQueue in KaraokeMachine.java. Once your refactoring is complete paste your results".

When I go to refactor mSongQueue to type of SongRequest, it doesn't work. My IDE want even yet me do it it says "java.util.Queue invalid type". I'm so confused, in the videos it shows it working perfectly and I'm following it step by step. What can I do?

Any help would be appreciated.

package com.teamtreehouse;

import com.teamtreehouse.model.Song;
import com.teamtreehouse.model.SongBook;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;

public class KaraokeMachine {
    private SongBook mSongBook;
    private BufferedReader mReader;
    private Queue<Song> mSongQueue;

    private Map<String, String> mMenu;

    public KaraokeMachine(SongBook songBook) {
        mSongBook = songBook;
        mReader = new BufferedReader(new InputStreamReader(System.in));
        mSongRequestQueue = new ArrayDeque<Song>();
        mMenu = new HashMap<String, String>();
        mMenu.put("add", "Add a new song to the song book");
        mMenu.put("play", "Play next song in the queue");
        mMenu.put("choose", "Choose a song to sing!");
        mMenu.put("quit", "Give up.  Exit the program");

    private String promptAction() throws IOException {
        System.out.printf("There are %d songs available and %d in the queue.  Your options are: %n",
        for (Map.Entry<String, String> option : mMenu.entrySet()) {
            System.out.printf("%s - %s %n",
        System.out.print("What do you want to do:  ");
        String choice = mReader.readLine();
        return choice.trim().toLowerCase();

    public void run() {
        String choice = "";
        do {
            try {
                choice = promptAction();
                switch (choice) {
                    case "add":
                        Song song = promptNewSong();
                        System.out.printf("%s added!  %n%n", song);
                    case "choose":
                        String artist = promptArtist();
                        Song artistSong = promptSongForArtist(artist);
                        System.out.printf("You chose:  %s %n", artistSong);
                    case "play":
                    case "quit":
                        System.out.println("Thanks for playing!");
                        System.out.printf("Unknown choice:  '%s'. Try again.  %n%n%n",
            } catch (IOException ioe) {
                System.out.println("Problem with input");
        } while (!choice.equals("quit"));

    private Song promptNewSong() throws IOException {
        System.out.print("Enter the artist's name:  ");
        String artist = mReader.readLine();
        System.out.print("Enter the title:  ");
        String title = mReader.readLine();
        System.out.print("Enter the video URL:  ");
        String videoUrl = mReader.readLine();
        return new Song(artist, title, videoUrl);

    private String promptArtist() throws IOException {
        System.out.println("Available artists:");
        List<String> artists = new ArrayList<>(mSongBook.getArtists());
        int index = promptForIndex(artists);
        return artists.get(index);

    private Song promptSongForArtist(String artist) throws IOException {
        List<Song> songs = mSongBook.getSongsForArtist(artist);
        List<String> songTitles = new ArrayList<>();
        for (Song song : songs) {
        System.out.printf("Available songs for %s: %n", artist);
        int index = promptForIndex(songTitles);
        return songs.get(index);

    private int promptForIndex(List<String> options) throws IOException {
        int counter = 1;
        for (String option : options) {
            System.out.printf("%d.)  %s %n", counter, option);
        System.out.print("Your choice:   ");
        String optionAsString = mReader.readLine();
        int choice = Integer.parseInt(optionAsString.trim());
        return choice - 1;

    public void playNext() {
        Song song = mSongRequestQueue.poll();
        if (song == null) {
            System.out.println("Sorry there are no songs in the queue." +
                    "  Use choose from the menu to add some");
        } else {
            System.out.printf("%n%n%n Open %s to hear %s by %s %n%n%n",


1 Answer