public void run() {
		setFont("Courier-20");
		
		while (true) { 
			int selection = getSelection();
			if (selection == QUIT) break;
			switch (selection) {
			case LIST_SONGS:
				listSongs();
				break;
			case LIST_ALBUMS:
				listAlbums();
				break;
			case ADD_SONG:
				addSong();
				break;
			case ADD_ALBUM:
				addAlbum();
				break;
			case LIST_SONGS_ON_ALBUM:
				listSongsOnAlbum();
				break;
			case UPDATE_SONG_PRICE:
				updateSongPrice();
				break;
			default:
				println("Invalid selection");
				break;
			}
		}
	}