求帮助改以下 getClass 和 instanceof的差别

/*
* 定义一个Animal类
  成员变量：
    int age,String name,double price
 手写它的equals方法，比较getClass和instanceof的区别
*
*
* */

public class Animal {
    public static void main(String[] args) {
        Dog s1=new Dog(1,26,8);
         Dog s2 = new Dog(1,27,8);
        System.out.println(s1.equals(s2));
       


    }
}
class Dog{
    int age;
    String name;
    double price;

    public Dog() {
    }

    public Dog(int age, String name, double price) {
        this.age=age;
        this.name=name;
        this.price=price;
    }



    @Override
    public boolean equals(Object obj) {
        //1.满足自反性，自己和自己比，
        if (this == obj) return true;

        //2.排他性
        //1.getClass
        if (obj == null || this.getClass() != obj.getClass()) return false;
        //2.2 instance of
        if (!(obj instanceof Dog)) return false;

    }

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