为什么这样无法解决问题

Question

public static void main(String[] args) {

// TODO Auto-generated method stub

Dog dog = new Dog();

Cat cat=new Cat();

Animal animal=dog;

Animal animal1=cat;

if(animal instanceof Dog){

Dog dog2=(Dog)animal;

}else{

System.out.println("无法进行类型转换");

}

if(animal instanceof Cat){

Cat cat1=(Cat)animal1;

}else{

System.out.println("无法进行类型转换");

}

}

}

Answer 1

你连问题都没说清楚怎么回答呢