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Andrea Miotto
iOS Development Techdegree Graduate 23,357 PointsMake a choose before an add
As the title, if you try to make a choose before adding any song, we get and error. This is an exception that we did not manage.
What do u want to do: choose
Available artists:
Your choice:
Exception in thread "main" java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:592)
at java.lang.Integer.parseInt(Integer.java:615)
at com.teamtreehouse.KaraokeMachine.promptForIndex(KaraokeMachine.java:113)
at com.teamtreehouse.KaraokeMachine.promptArtist(KaraokeMachine.java:90)
at com.teamtreehouse.KaraokeMachine.run(KaraokeMachine.java:59)
at Karaoke.main(Karaoke.java:9) ```
3 Answers
Andrea Miotto
iOS Development Techdegree Graduate 23,357 PointsI just changed KaraokeMachine.java, the run() method:
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 "play":
playNext();
break;
case "choose":
//added an if and an else. Probably there is a cleaner way to do it with IOException
if (mSongBook.getSongCount() != 0) {
String artist = promptArtist();
Song artistSong = promptSongForArtist(artist);
mSongQueue.add(artistSong);
System.out.printf("You chose: %s %n", artistSong);
break;
} else {
System.out.println("\nThere are no songs availabe. Make a new choise \n");
break;
}
case "quit":
System.out.println("Thanks for playing!");
break;
default:
System.out.printf("Unknow choice: '%s'. Try again. %n%n%n", choice);
}
} catch (IOException ioe) {
System.out.println("Problem with input");
ioe.printStackTrace();
}
} while (!choice.equals("quit"));
}
Iskandar Fendi
5,700 PointsCan you show me your code in line 65?
Andrea Miotto
iOS Development Techdegree Graduate 23,357 PointsThank you Iskandar, but I know how to fix it, I was just warning Craig Dannis about that.
Craig Dennis
Treehouse TeacherGood call! Do you have code to fix it?
This should definitely be part of a unit test!
Thanks!