多态的可扩展性动物行为实例 day09

package com.shujia.day09;

import java.nio.channels.Pipe;

/*
    多态的好处
        1、提高了程序的维护性(由继承保证)
        2、提高了程序的扩展性(由多态保证)

 */
class Animal{
    String name;
    int age;

    public Animal() {
    }

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

    public void eat(){
        System.out.println("吃");
    }

    public void sleep(){
        System.out.println("睡");
    }
}

class Dog extends Animal{
    @Override
    public void eat() {
        System.out.println("

标签：System,day09,可扩展性,void,多态,eat,sleep,println,public	

From： https://www.cnblogs.com/qiwei-bigdata/p/18344017