2、使用抽象类和接口两种方式实现下面的代码 饲养员在给动物喂食时，给不同的动物喂不同的食物，而且在每次喂食时，动物都会发出欢快的叫声。例如，给小狗喂骨头，小狗会汪汪叫；给小猫喂食，小猫会喵喵叫。 本案例要求编写一个程序模拟饲养员喂食动物的过程，案例要求如下： （1）饲养员给小狗喂骨头，小狗汪汪叫。 （2）饲养员给小猫喂小鱼，小猫喵喵叫。

使用抽象类实现：

abstract class Animal {
    abstract void eat(String food);
    void makeSound() {
        System.out.println("Animal is making a sound...");
    }
}

class Dog extends Animal {
    void eat(String food) {
        if (food.equals("bone")) {
            System.out.println("Dog is eating " + food);
            makeSound();
        } else {
            System.out.println("Dog does not eat " + food);
        }
    }
    
    void makeSound() {
        System.out.println("Dog is barking: " + "汪汪");
    }
}

class Cat extends Animal {
    void eat(String food) {
        if (food.equals("fish")) {
            System.out.println("Cat is eating " + food);
            makeSound();
        } else {
            System.out.println("Cat does not eat " + food);
        }
    }
    
    void makeSound() {
        System.out.println("Cat is meowing: " + "喵喵");
    }
}

public class Zoo {
    public static void main(String[] args) {
        Animal dog = new Dog();
        dog.eat("bone");
        
        Animal cat = new Cat();
        cat.eat("fish");
    }
}

使用接口实现：

interface Animal {
    void eat(String food);
    void makeSound();
}

class Dog implements Animal {
    public void eat(String food) {
        if (food.equals("bone")) {
            System.out.println("Dog is eating " + food);
            makeSound();
        } else {
            System.out.println("Dog does not eat " + food);
        }
    }
    
    public void makeSound() {
        System.out.println("Dog is barking: " + "汪汪");
    }
}

class Cat implements Animal {
    public void eat(String food) {
        if (food.equals("fish")) {
            System.out.println("Cat is eating " + food);
            makeSound();
        } else {
            System.out.println("Cat does not eat " + food);
        }
    }
    
    public void makeSound() {
        System.out.println("Cat is meowing: " + "喵喵");
    }
}

public class Zoo {
    public static void main(String[] args) {
        Animal dog = new Dog();
        dog.eat("bone");
        
        Animal cat = new Cat();
        cat.eat("fish");
    }
}