package headfirst.facade.hometheater;public class DvdPlayer {	String description;	int currentTrack;	Amplifier amplifier;	String movie;		public DvdPlayer(String description, Amplifier amplifier) {		this.description = description;		this.amplifier = amplifier;	} 	public void on() {		System.out.println(description + " on");	} 	public void off() {		System.out.println(description + " off");	}        public void eject() {		movie = null;                System.out.println(description + " eject");        } 	public void play(String movie) {		this.movie = movie;		currentTrack = 0;		System.out.println(description + " playing \"" + movie + "\"");	}	public void play(int track) {		if (movie == null) {			System.out.println(description + " can't play track " + track + " no dvd inserted");		} else {			currentTrack = track;			System.out.println(description + " playing track " + currentTrack + " of \"" + movie + "\"");		}	}	public void stop() {		currentTrack = 0;		System.out.println(description + " stopped \"" + movie + "\"");	} 	public void pause() {		System.out.println(description + " paused \"" + movie + "\"");	}	public void setTwoChannelAudio() {		System.out.println(description + " set two channel audio");	} 	public void setSurroundAudio() {		System.out.println(description + " set surround audio");	} 	public String toString() {		return description;	}}