动物类

java">package KeepPets20240710;public class Animal {private String color;private int age;public Animal(){}public Animal(String color, int age) {this.color = color;this.age = age;}public String getColor() {return color;}public void setColor(String color) {this.color = color;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public void eat(String something) {System.out.println(this.age + "岁的" + this.color + "色动物在吃" + something);}}

        猫类

java">package KeepPets20240710;public class Cat extends Animal{public Cat() {}public Cat(String color, int age) {super(color, age);}public void catchMouse() {System.out.println(this.getAge() + "的" + this.getColor() + "猫在抓老鼠");}
}

        狗类

java">package KeepPets20240710;public class Dog extends Animal{public Dog() {}public Dog(String color, int age) {super(color, age);}public void LookHouse() {System.out.println(this.getAge() + "的" + this.getColor() + "狗在看家");}
}

        人类

java">package KeepPets20240710;public class Person {String name;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 KeepPets(Animal a, String something) {System.out.printf("%d岁的饲养员%s在喂养%d岁的%s%s吃%s\n", this.age, this.name, a.getAge(),a.getColor(), (a instanceof Dog? "狗" : "猫") , something);if (a instanceof Dog d) {d.LookHouse();} else if(a instanceof Cat c) {c.catchMouse();} else {System.out.println("没这品种");}}
}

         测试

java">package KeepPets20240710;
import java.util.Scanner;
public class KeepPetsTest {public static void main(String[] args) {Person p = creatPerson();Animal aDog = creatDog();Animal aCat = creatCat();p.KeepPets(aDog, "骨头");p.KeepPets(aCat, "🐟");}public static Person creatPerson() {Scanner sc = new Scanner(System.in);System.out.println("请输入饲养员的姓名");String name = sc.next();System.out.println("请输入饲养员的年龄");int age = sc.nextInt();return new Person(name, age);}public static Dog creatDog() {Scanner sc = new Scanner(System.in);System.out.println("请输入狗的姓名");String name = sc.next();System.out.println("请输入狗的年龄");int age = sc.nextInt();return new Dog(name, age);}public static Cat creatCat() {Scanner sc = new Scanner(System.in);System.out.println("请输入猫的姓名");String name = sc.next();System.out.println("请输入猫的年龄");int age = sc.nextInt();return new Cat(name, age);}
}