package designpatterns.observer.aspectj;public class Song implements Playable{	private String name;	public Song(String name) {		super();		this.name = name;	}		public String getName() {		return name;	}	public void play() {		System.out.println("Playing song " + getName());	}		public void showLyrics(){		System.out.println("Displaying lyrics for " + getName());	}		public boolean equals(Object o){		Song other = (Song) o;		return this.name.equals(other.name);	}		public int hashCode() {		return name.hashCode();	}	}