package headfirst.combining.observer;public class CountingDuckFactory extends AbstractDuckFactory {  	public Quackable createMallardDuck() {		return new QuackCounter(new MallardDuck());	}  	public Quackable createRedheadDuck() {		return new QuackCounter(new RedheadDuck());	}  	public Quackable createDuckCall() {		return new QuackCounter(new DuckCall());	}   	public Quackable createRubberDuck() {		return new QuackCounter(new RubberDuck());	}}