import java.util.Comparator;
public class SongComparator implements Comparator
{
public int compare( Object obj1, Object obj2 )   
   {
   MusicRecord mr1, mr2; 
   String song1, song2;
   mr1 = (MusicRecord)obj1;
   mr2 = (MusicRecord)obj2;
   // musicRecord has a getSong() method that returns a
   // String, so use the String.compareTo() method
   song1 = mr1.getSong();
   song2 = mr2.getSong();
   return ( song1.compareTo( song2 ) );
//note:return (mr1.getSong().compareTo(mr2.getSong())); 
   }
}