package com.imooc;public class Animal { public int age = 10; public String name; public void eat(){ System.out.println("年齡："+age+"動物具有吃東西的能力！"); } public Animal(){ System.out.println("Animal類執行了"); age = 20; }}package com.imooc;public class Dog extends Animal { public void eat(){ System.out.println("年齡："+age+"狗具有吃東西的能力！"); } public Dog(){ System.out.println("Dog類執行了"); }}package com.imooc;public class Initail { public static void main(String[] args) { // TODO Auto-generated method stub? ? ? ? Animal animal = new Animal();? ? ? ? System.out.println("animal age:"+animal.age); Dog dog = new Dog();? ? ? ? dog.age = 10;? ? ? ? dog.name = "xiaohua";? ? ? ? dog.eat(); }
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