package com.imooc;public class Animal{ private int age; private String name; public Animal(){ this.name="动物"; this.age=10; }; public Animal(String name,int age){ this.name=name; this.age=age; } public void info(){ System.out.println("动物名:"+name+" 年龄:"+age); }}package com.imooc;public class Dog extends Animal{ private String name; private int age; public Dog(){} public Dog(String name,int age){ this.name=name; this.age=age; }}package com.imooc;public class HelloWorld { public static void main(String[] args) { Animal animal=new Animal(); Dog dog=new Dog("狗狗",12); animal.info(); dog.info(); }}
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