package ex14;
public class TestAbstractClass {

    public static void main(String[] args) {
        // TODO 自动生成方法存根
        Animal animal=new Chicken();
        eat(animal);
        
        animal=new Duck();
        eat(animal);
    }
    
    public static void eat(Animal animal){
        animal.howToEat();
    }

}

abstract class Animal{
    public abstract void howToEat();
}

class Chicken extends Animal{
    public void howToEat(){
        System.out.println("Fry it");
    }
}

class Duck extends Animal{
    public void howToEat(){
        System.out.println("Roast it");
    }
}