java学生喂养宠物

package c02.s01.p05;


public class Animal {
    private String name;
    private int age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public void speak() {
        System.out.println(name + "今年"  + age + "岁了。");
    }

    public void move() {
        System.out.println(name + "在动……");
    }

    public void eat() {
        System.out.println(name + "在吃……");
    }

    @Override
    public String toString() {
        return "Animal{" +
                "name='" + name + ''' +
                ", age=" + age +
                '}';
    }
}

package c02.s01.p05;


public class Cat extends Animal {
    
    @Override
    public void move() {
        System.out.println("猫咪[" + getName() + "]在走路。");
    }

    
    @Override
    public void eat() {
        System.out.println("猫咪[" + getName() + "]爱吃鱼虾。");
    }

    
    public void play() {
        System.out.println("猫咪[" + getName() + "]在玩老鼠。");
    }
}

package c02.s01.p05;


public class Dog extends Animal {
    
    @Override
    public void move() {
        System.out.println("狗崽[" + getName() + "]在蹦跳。");
    }

    
    @Override
    public void eat() {
        System.out.println("狗崽[" + getName() + "]爱吃骨头。");
    }

    
    public void play() {
        System.out.println("狗崽[" + getName() + "]在玩飞盘。");
    }
}

package c02.s01.p05;


public class Bird extends Animal {
    
    @Override
    public void move() {
        System.out.println("鸟儿[" + getName() + "]在飞翔。");
    }

    
    @Override
    public void eat() {
        System.out.println("鸟儿[" + getName() + "]爱吃小虫。");
    }

    
    public void play() {
        System.out.println("鸟儿[" + getName() + "]在玩羽毛。");
    }
}

package c02.s01.p05;


public class Student {
    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void feed(Animal animal) {
        animal.speak(); // 子类继承父类的方法
        animal.move(); // 体现多态（子类改写了父类的同名同参方法）
        animal.eat(); // 体现多态（子类改写了父类的同名同参方法）
        if (animal instanceof Cat) { // 判断是否是猫实例
            System.out.println(name + "喂养猫咪[" + animal.getName() + "]。");
            Cat cat = (Cat) animal; // Animal向下转型为Cat
            cat.play();
        } else if (animal instanceof Dog) { // 判断是否是狗实例
            System.out.println(name + "喂养狗崽[" + animal.getName() + "]。");
            Dog dog = (Dog) animal; // Animal向下转型为Dog
            dog.play();
        } else if (animal instanceof Bird) { // 判断是否是鸟实例
            System.out.println(name + "喂养鸟儿[" + animal.getName() + "]。");
            Bird bird = (Bird) animal; // Animal向下转型为Bird
            bird.play();
        } else {
            System.out.println(name + "喂养动物[" + animal.getName() + "]。");
        }
    }
}

package c02.s01.p05;


public class TestStudent {
    public static void main(String[] args) {
        // 创建学生对象
        Student student = new Student();
        student.setName("张三丰");

        // 创建第一个动物
        Animal animal1 = new Cat();
        animal1.setName("小花");
        animal1.setAge(4);

        // 创建第二个动物
        Animal animal2 = new Dog();
        animal2.setName("大黄");
        animal2.setAge(5);

        // 创建第三个动物
        Animal animal3 = new Bird();
        animal3.setName("笨笨");
        animal3.setAge(3);

        // 调用学生对象的喂养方法，传入不同的动物对象
        student.feed(animal1);
        student.feed(animal2);
        student.feed(animal3);
    }
}