java多态修改成员变量遇到的问题

public class Main {
    public static void main(String[] args) {
        SuperClass superObj=new SuperClass();
        SubClass subObj=new SubClass();
        SuperClass superReferToSub=subObj;

        superReferToSub.method();
        superReferToSub.print();
    }
}

public class SuperClass {
    int i=0;
    public void method(){
        System.out.println("父类方法");
    }
    public void print(){
        System.out.println(i);
    }

}

class SubClass extends SuperClass {
    //int i=2;
    public void method(){
        i++;
        System.out.println("子类的i变成了"+i);
        System.out.println("子类方法");
    }

}

子类的i变成了1

子类方法

1

public class SuperClass {
    int i=0;
    public void method(){
        System.out.println("父类方法");
    }
    public void print(){
        System.out.println(i);
    }

}

class SubClass extends SuperClass {
    int i=2;
    public void method(){
        i++;
        System.out.println("子类的i变成了"+i);
        System.out.println("子类方法");
    }

}

子类的i变成了3

子类方法

0