I am sure this is something stupid, but I can't figure it out for the life of me.... In the main method, when I am trying to create new artists, I keep getting an error on the creating a new "Recording" line (ie: surfacing and pop). It is saying it requires String, String[] but is getting String, MusicCollection.Artist. And it says "actual argument MusicCollection.Artist cannot be converted to String[] by method invocation conversion.
public class MusicCollection {
private Artist[] artists = new Artist[100];
private Recording[] recordings = new Recording[200];
private int artistCount = 0;
private int recordingCount = 0;
//toString method for MusicCollection
public String toString() {
StringBuffer sb = new StringBuffer();
if (recordingCount > 0) {
sb.append(recordings[0].toString());
for (int i = 1; i < recordingCount; i++) {
sb.append("\n" + recordings[i]);
}
}
return sb.toString();
}
public class Artist {
private String name;
/**
* Construct an artist object and add it to the collection.
*
* @param name the name of the Artist
*/
public Artist(String name) {
this.name = name;
artists[artistCount++] = this;
}
/**
* Retrieve the artist as a string
*
* @return the string representation of the artist
*/
public String toString() {
return name;
}
}
public class Recording {
private String name;
private Artist[] artists = new Artist[100];
private Track[] tracks = new Track[200];
private int trackCount = 0;
public class Track {
private String name;
/**
* Construct track object and add it to the collection.
*
* @param name the name of the track
*/
public Track(String name) {
this.name = name;
tracks[trackCount++] = this;
}
/**
* Retrieve the track as a string
*
* @return the string representation of the track
*/
public String toString() {
return name;
}
}
public Recording(String name, String Artist[]) {
this.name = name;
this.artists = artists;
recordings[recordingCount++] = this;
}
public String toString() {
StringBuffer sb = new StringBuffer(name);
sb.append(" by " + artists + ": ");
if (trackCount > 0) {
sb.append(tracks[0].toString());
for (int i = 1; i < trackCount; i++) {
sb.append(", " + tracks[i]);
}
}
return sb.toString();
}
}
public static void main(String[] args) {
MusicCollection mc = new MusicCollection();
Artist sarahM = mc.new Artist("Sarah McLachlan");
Recording surfacing = mc.new Recording("Surfacing", sarahM);
Recording.Track surfacing1 = surfacing.new Track("Building a Mystery");
Recording.Track surfacing4 = surfacing.new Track("Adia");
Artist u2 = mc.new Artist("U2");
Recording pop = mc.new Recording("Pop", u2);
Recording.Track pop1 = pop.new Track("Discotheque");
Recording.Track pop5 = pop.new Track("Miami");
System.out.println(mc);
}
}
Needed to have: public Recording(String name, Artist someArtist)
and in my Recording class, only have:
private Artist artist;
since I had already declared Artist as an array. I also had to change this.artists = artists;
to this.artists = someArtist;
, since that was the variable I am passing. Worked like a charm after!
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