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Java

Workspace help

I am not sure what I am missing. I have a lot of errors and when I fix them it doesn't go away, so I am not sure what I am doing wrong.

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.HashMap; import java.until.Map;

public class KaraokeMachine { private SongBook mSongBook; private BufferReader mReader; private Map<String, String> mMenu;

public KaraokeMachine(SongBook songBook){ mSongBook = songBook; mReader = new BufferReader(new InputStreamReader(System.in)); mMenu = new HashMap<String, String>(); mMenu.put("add", "Add a new song to the song book"); mMenu.put("quit", "Give up. Exit the program"); }

private String promptAction() throws IOException { System.out.printf("There are %d songs available. Your options are: %n", mSongBook.getSongCount()); for (Map.Entry<String, String> option : mMenu.entry()) { 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 "quit": System.out,println("Thanks for playing!"); break; default: System.out.printf("Unknoown choice: '%s'. Try again. %n%n%n", choice); } } catch(IOException ioe) { System.out.println("Problem with input"); ioe.printStackTrace(); } } while(!choice.equals("quit")); }

private Song promptNewSong() throw 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 vidoeUrl = mReader.readLine();
  return new Song(artist, title, videoUrl);
}

}

}

Matthew, if this is part of a challenge it would help if you could provide a link. If not, need the Song and SongBook classes in order to test it.

Sorry, this isn't part of a challenge. I tried to run this and I got a lot off errors. I tried to fix some of the ones I understood, but others I didn't quite get why it was wrong.

Karaoke.java: import com.teamtreehouse.KaraokeMachine; import com.teamtreehouse.model.Song; import com.teamtreehouse.model.SongBook;

public class Karaoke {

public static void main(String[] args) { SongBook songBook = new SongBook(); KaraokeMachine machine = new KaraokeMachine(songBook); machine.run(); } }

SongBook.java:

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

public class Karaoke {

public static void main(String[] args) { SongBook songBook = new SongBook(); KaraokeMachine machine = new KaraokeMachine(songBook); machine.run(); } }

Song.java:

package com.teamtreehouse.model;

public class Song { private String mArtist; private String mTitle; private String mVideoUrl;

public Song(String artist, String title, String videoUrl) { mArtist = artist; mTitle = title; mVideoUrl = videoUrl; }

public String getTitle() { return mTitle; }

public String getArtist() { return mArtist; }

public String getVideoUrl() { return mVideoUrl; }

@Override public String toString() { return String.format("Song: %s by %s", mTitle, mArtist); } }

2 Answers

Ok, I put your classes into my IDE and tried to compile them. Got lots of errors in KaraokeMachine. And, by the way, SongBook was empty.

I've added a comment each place the compiler found an error, and tried to correct them, if I saw a quick fix:

import java.io.BufferedReader;
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.util.HashMap; 
import java.util.Map;  // you had .until. instead of .util.

public class KaraokeMachine {
   private SongBook mSongBook;
   private BufferedReader mReader; //you had BufferReader instead of BufferedReader
   private Map mMenu;

   public KaraokeMachine(SongBook songBook){
      mSongBook = songBook;
      mReader = new BufferedReader(new InputStreamReader(System.in)); //BufferReader again
      mMenu = new HashMap();
      mMenu.put("add", "Add a new song to the song book");
      mMenu.put("quit", "Give up. Exit the program");
   }

   private String promptAction() throws IOException {
      System.out.printf("There are %d songs available. Your options are: %n", mSongBook.getSongCount());  //no getSongCount() method in SongBook
      for (Map.Entry option : mMenu.entry()) {  //there is no entry() method for HashMaps
         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);  //there is no addSong() method in SongBook
                  System.out.printf("%s added! %n%n", song);  //you were missing a " at start of string
                  break;
               case "quit": 
                  System.out.println("Thanks for playing!"); // you had System, instead of System.
                  break;
               default: 
                  System.out.printf("Unknoown choice: '%s'. Try again. %n%n%n", choice);
            }
         }
         catch(IOException ioe) {
               System.out.println("Problem with input"); ioe.printStackTrace();
         }
      } while(!choice.equals("quit"));
   }

   private Song promptNewSong() throws IOException { //you had throw instead of throws
      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 vidoeUrl = mReader.readLine();  //vidoeUrl was mis-spelled
      return new Song(artist, title, videoUrl);
   }
}

//}  //you had an extra }

Hope this helps.

I had another question. to post my workshop on here again, how do I make it like how you posted it instead of how I originally posted it.

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