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Java Java Data Structures Efficiency! Implement Chooser UI

Quentin Quarles
Quentin Quarles
1,900 Points
Posted by Quentin Quarles
Quentin Quarles
1,900 Points

KaraokeMachine.java compilation error

When I try to compile, I get the following errors:

./com/teamtreehouse/KaraokeMachine.java:88: error: unmappable character for encod ing ASCII
private Song promptSongForArtist(String artist) throws IOException{???
./com/teamtreehouse/KaraokeMachine.java:88: error: unmappable character for encod ing ASCII
private Song promptSongForArtist(String artist) throws IOException{???
./com/teamtreehouse/KaraokeMachine.java:88: error: unmappable character for encod ing ASCII
private Song promptSongForArtist(String artist) throws IOException{???
^
./com/teamtreehouse/KaraokeMachine.java:88: error: unmappable character for encod ing ASCII
private Song promptSongForArtist(String artist) throws IOException{???
^
./com/teamtreehouse/KaraokeMachine.java:88: error: unmappable character for encod ing ASCII

I used the code as presented in the video lectures

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()); } int index = promptForIndex(songTitles); return songs.get(index); }

James Reynolds
James Reynolds
3,325 Points
James Reynolds
James Reynolds
3,325 Points

Post your code from KaraokeMachine.java. https://teamtreehouse.com/community/posting-code-to-the-forum Did you use a try/catch in your run() method?

try {
  promptForArtist(String artist);
} catch (IOException ioe) {
  ioe.printStackTrace();
}

1 Answer

Valerie O. Okpoko
Valerie O. Okpoko
9,721 Points
Valerie O. Okpoko
Valerie O. Okpoko
9,721 Points

You are getting the errors because you left out the <type> in the declaration of the List variable. As part of the syntax for declaring a List variable, you must put its type in an angle brace <>. Try using the following codes:

private Song promptSongForArtist(String artists) throws IOException { List<Song> songs = mSongBook.getSongsForArtist(artists); //<Song> is the data type of List variable songs List<String> songTitles = new ArrayList<> (); //<String> is the data type of List variable songTitles for(Song song: songs) { songTitles.add(song.getTitle() ); } int index = promptForIndex(songTitles); return songs.get(index); }