public class Song {
   private String title;
   private String album;
   private String artist;
   private int songLength;

   public Song() {
      title = "";
      album = "";
      artist = "";
      songLength = 0;
   }

   public Song(String t, String al, String ar, int length) {
      title = t;
      album = al;
      artist = ar;
      songLength = length;
   }

   public void setTitle(String t) { title = t; }

   public void setAlbum(String al) { album = al; }

   public void setArtist(String ar) { artist = ar; }

   public void setLength(int length) { songLength = length; }

   public String getTitle() { return title; }

   public String getAlbum() { return album; }

   public String getArtist() { return artist; }

   public int getLength() { return songLength; }

   public boolean equals(Object obj) {
      Song s = (Song) obj;
      if (s != null) {
         return this.getTitle().equals(s.getTitle()) &&
               this.getAlbum().equals(s.getAlbum()) &&
               this.getArtist().equals(s.getArtist()) &&
               this.getLength() == s.getLength();
      }
      return false;
   }

   public String toString() {
      return "title: " + title + ", album: " + album + ", artist: " + artist + ", length: " + songLength;
   }
}