Java Multi-Level Comparator

Question

I am working on a problem where I must take these \"Song-artist pairs\" from an input file and sort alphabetically. The guidelines to the sorting goes like so:

• Sh

Answer 1

In your compare method, compare the song titles if the artists names are identical. Like this:

public static class SongComparator implements Comparator{
    public int compare(Song a, Song b){
        int rslt a.effectiveAuthor().compareTo(b.effectiveAuthor());
        if (rslt ==0)
        {
            // compare song names
            rslt = a.getSongName().compareTo(b.getSongName());
        }
        return rslt;
    }
}