interface Fruit {

    void eat();

}

class Apple implements Fruit {

    public void eat() {

        System.out.println("I am eating apple.");

    }

}

class Orange implements Fruit {

    public void eat() {

        System.out.println("I am  eating orange.");

    }

}

class Factory {

    public Fruit getInstance(String className) {

        Fruit f = null;

        if ("apple".equals(className)) {

            f = new Apple();

        } else {

            f = new Orange();

        }

        return f;

    }

}

public class InterfaceDemo04 {

    public static void main(String[] args) {

        Factory factory = new Factory();

        Fruit f = null;

        f = factory.getInstance("apple");

        f.eat();

    }

}