package com.imooc;

public class Initail {

?public static void main(String[] args) {
??// TODO Auto-generated method stub
??
????? /* Dog dog=new Dog();
?????? dog.age=10;
?????? Dog dog2=new Dog();
?????? dog2.age=10;
?????? */
?????? Dog dog=new Dog();
?????? Animal animal=dog;
?????? Dog dog2=(Dog)animal;
?????? Cat cat=new Cat();
?????? if(animal instanceof Cat){
?????? Cat cat=(Cat)animal;
?????? }else{
??? ??? System.out.println("無法進行類型轉換");
?????? }
?}}

package com.imooc;

public class Initail {

?public static void main(String[] args) {
??// TODO Auto-generated method stub
??
????? /* Dog dog=new Dog();
?????? dog.age=10;
?????? Dog dog2=new Dog();
?????? dog2.age=10;
?????? */
?????? Dog dog=new Dog();
?????? Animal animal=dog;
?????? Dog dog2=(Dog)animal;
?????? Cat cat2=new Cat();
?????? if(animal instanceof Cat){
?????? Cat cat=(Cat)animal;
?????? }else{
??? ??? System.out.println("無法進行類型轉換");
?????? }
?}}