[进阶]面向对象之多态(练习)

news2024/9/28 3:02:26

需求:
在这里插入图片描述

//父类animal
package polymorphism.Test;

public abstract class Animal {
    private int age;
    private String color;

    public Animal() {
    }

    public Animal(int age, String color) {
        this.age = age;
        this.color = color;
    }

    public int getAge() {
        return age;
    }

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

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    public void eat(String something){
        System.out.println("动物再吃"+something);
    }


}

package polymorphism.Test;

public class Dog extends Animal{
    public Dog() {
    }

    public Dog(int age, String color) {
        super(age, color);
    }

    @Override
    public void eat(String something) {
        System.out.println(getAge()+"岁的"+getColor()+"颜色的狗两只前腿死死的抱住"+something+"猛吃");

    }
}

package polymorphism.Test;

public class Cat extends Animal{
    public Cat() {
    }

    public Cat(int age, String color) {
        super(age, color);
    }
    @Override
    public void eat(String something){
        System.out.println(getAge()+"岁的"+getColor()+"颜色的猫咪眯着眼睛侧着头吃"+something);
    }

    public void catchMouse(){
        System.out.println("猫抓老鼠");
    }
}

package polymorphism.Test;

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

    public Person() {
    }

    public Person(String name, int age) {
        this.name = name;
        this.age = 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 keepPet(Dog dog,String something){
        //System.out.println("年龄为"+getAge()+"岁的"+name+"养了一只"
                //+dog.getColor()+"颜色的"+dog.getAge()+"岁的狗");
        //dog.eat(something);


    //public void keepPet(Cat cat,String something){
        //System.out.println("年龄为"+getAge()+"岁的"+name+"养了一只"
                //+cat.getColor()+"颜色的"+cat.getAge()+"岁的猫");
        //cat.eat(something);

    //}
    public void keepPet(Animal a,String something){
        if(a instanceof Dog d){
            System.out.println("年龄为"+getAge()+"岁的"+name+"养了一只"
                    +a.getColor()+"颜色的"+a.getAge()+"岁的狗");
            d.eat(something);
        }else if (a instanceof Cat c){
            System.out.println("年龄为"+getAge()+"岁的"+name+"养了一只"
                    +a.getColor()+"颜色的"+a.getAge()+"岁的猫");
            c.eat(something);
        }else {
            System.out.println("没有这种动物");
        }
    }

}

测试类

package polymorphism.Test;

public class Test {
    public static void main(String[] args) {
       /* Person p1 = new Person("老王",30);
        Dog d = new Dog(2,"黑");
        p1.keepPet(d,"骨头");

        Person p2 = new Person("老李",25);
        Cat c = new Cat(3,"灰");
        p2.keepPet(c,"鱼");*/

        Person p = new Person("老王",30);
        Dog d = new Dog(2,"黑");
        Cat c = new Cat(3,"灰");
        p.keepPet(d,"骨头");
        p.keepPet(c,"鱼");
    }
}