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![Chance Edward](https://uploads.teamtreehouse.com/production/profile-photos/11710016/micro_kuromi.jpg)
Chance Edward
4,507 PointsLocal Development Environment (Does anyone know the answer?)
Use the rename refactoring to name the Queue from mSongQueue to mSongRequestQueue in KaraokeMachine.java. Once your refactoring is complete paste your results.
import com.teamtreeHouse.Song;
import com.teamtreeHouse.SongBook;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Queue;
//Use the rename refactoring to name the Queue from mSongQueue to mSongRequestQueue in KaraokeMachine.java. //Once your refactoring is complete paste your results.
public class KaraokeMachine {
private SongBook mSongBook;
private BufferedReader mReader;
private Queue<SongRequest> mSongRequestQueue;
private Map<String, String> mMenu;
public KaraokeMachine(SongBook songBook) {
mSongBook = songBook;
mReader = new BufferedReader(new InputStreamReader(System.in));
mSongRequestQueue = new ArrayDeque<SongRequest>();
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",
mSongBook.getSongCount(), mSongRequestQueue.size());
for (Map.Entry<String, String> option : mMenu.entrySet()) {
System.out.printf("%s - %s %n", option.getKey(), option.getValue());
}
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();
mSongBook.addSong(song);
System.out.printf("%s added! %n%n", song);
break;
case "choose":
String singerName = promptForSingerName();
String artist = promptArtist();
Song artistSong = promptSongForArtist(artist);
SongRequest songRequest = new SongRequest(singerName, artistSong);
if (mSongRequestQueue.contains(songRequest)) {
System.out.printf("%n%n Whoops %s already requested %s!", singerName, artistSong);
break;
}
mSongRequestQueue.add(songRequest);
System.out.printf("You chose: %s %n", artistSong);
break;
case "play":
playNext();
break;
case "quit":
System.out.println("Thanks for playing!");
break;
default:
System.out.printf("Unknown choice: '%s'. Try again. %n%n%n", choice);
}
} catch (IOException ioe) {
System.out.println("Problem with input");
ioe.printStackTrace();
}
} while (!choice.equals("quit"));
}
private String promptForSingerName() throws IOException {
System.out.print("Enter the singer's name: ");
return mReader.readLine();
}
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) {
songTitles.add(song.getTitle());
}
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);
counter++;
}
System.out.print("Your choice: ");
String optionAsString = mReader.readLine();
int choice = Integer.parseInt(optionAsString.trim());
return choice - 1;
}
public void playNext() {
SongRequest songRequest = mSongRequestQueue.poll();
if (songRequest == null) {
System.out.println("Sorry there are no songs in the queue." + " Use choose from the menu to add some");
} else {
Song song = songRequest.getSong();
System.out.printf("%n%n%n Ready %s? Open %s to hear %s by %s %n%n%n", songRequest.getSingerName(),
song.getVideoUrl(), song.getTitle(), song.getArtist());
}
}
}
1 Answer
![Steven Parker](https://uploads.teamtreehouse.com/production/profile-photos/969492/micro_tool_chess_set_2.jpg)
Steven Parker
230,688 PointsIf you haven't done this already, it can often be helpful to look at the the answers to other questions asked about the same issue which can also be done by clicking on the last of the "breadcrumbs" at the top of the page.
Chance Edward
4,507 PointsChance Edward
4,507 PointsI've tried that but I couldn't find the answer, but thanks for your help (OuO)