打扰了，可以帮助一下吗

package com;

abstract class ElectricityCharge {
    public abstract Double money(int i);
}

package com;

public class ElectricityChargeOfRain extends ElectricityCharge{
    @Override
    public Double money(int i) {
        Double money = 0.0;
        if(i<=200){
            money = 2.25*i;
        }else if(i>200){
            money = 2.25*200+2.25*(i-200)*0.9;
        }
        return money;
    }
}

package com;

public class ElectricityChargeLackRain extends ElectricityCharge{
    @Override
    public Double money(int i) {
        Double money = 0.0;
        if(i<=150){
            money = 3.5*i;
        } else if(i>150){
            money = 3.5*200+3.5*(i-200)*1.1;
        }
        return money;
    }
}

package com;

public class Text {
    public static void main(String[] args) {
        ElectricityChargeOfRain electricityChargeOfRain = new ElectricityChargeOfRain();
        ElectricityChargeLackRain electricityChargeLackRain = new ElectricityChargeLackRain();
        Double moneyOfRain = electricityChargeOfRain.money(300);
        Double moneyLackRain = electricityChargeLackRain.money(230);
        System.out.println(moneyOfRain);
        System.out.println(moneyLackRain);
    }
}