Question

public static void main(String[] args) {

    Address address = new Address(1, "a", "a", "a", "a", 1);

    ResidentTaxPayer a1 = new ResidentTaxPayer("a", "a", "a", 50000, address,
            State.NSW);
    ForeignResidentTaxPayer b1 = new ForeignResidentTaxPayer("a", "a", "a",
            10000, address, "a");
    WorkingHolidayTaxPayer c1 = new WorkingHolidayTaxPayer("a", "a", "a",
            150000, address, "a");

    ArrayList array = new ArrayList<>();

    array.add(a1);
    array.add(b1);
    array.add(c1);

    double totalTaxPayable = 0;
    for (Object d : array) {
        totalTaxPayable =+ d.calcTax(TaxPayer.getIncome());
    }
    System.out.println(totalTaxPayable);
}

ForeignResidentTaxPayer Calctax：

public static double calcTax(double income) {
   double Tax = 0;
   if (income < 90001) {
       Tax = income * (32.5 / 100);
   } else if (income >= 90001 && income < 180001) {
       Tax = 29250 + income * (37 / 100);
   } else {
       Tax = 62550 + income * (45 / 100);
   }
            return Tax;
        }
@Override
public double calcTax() {
    double Tax = 0;
    if (getIncome() < 90001) {
        Tax = getIncome() * (32.5 / 100);
    } else if (getIncome() >= 90001 && getIncome() < 180001) {
        Tax = 29250 + getIncome() * (37 / 100);
    } else {
        Tax = 62550 + getIncome() * (45 / 100);
    }
    return Tax;
}

ResidentTaxPayer：`

public static double calcTax(double income) {
        double Tax = 0;
        if (income < 18201) {
            Tax = 0;
        } else if (income >= 18201 && income < 37001) {
            Tax = income - 18200 * (19 / 100);
        } else if (income >= 37001 && income < 90001) {
            Tax = 3572 + (income - 37000) * (32.5 / 100);
        } else if (income >= 90001 && income < 180001) {
            Tax = 20797 + (income - 90000) * (37 / 100);
        } else {
            Tax = 54097 + (income - 180000) * (45 / 100);
        }
        return Tax;
    }

@Override
public double calcTax() {
    double Tax = 0;
    if (getIncome() < 18201) {
        Tax = 0;
    } else if (getIncome() >= 18201 && getIncome() < 37001) {
        Tax = getIncome() - 18200 * (19 / 100);
    } else if (getIncome() >= 37001 && getIncome() < 90001) {
        Tax = 3572 + (getIncome() - 37000) * (32.5 / 100);
    } else if (getIncome() >= 90001 && getIncome() < 180001) {
        Tax = 20797 + (getIncome() - 90000) * (37 / 100);
    } else {
        Tax = 54097 + (getIncome() - 180000) * (45 / 100);
    }
    return Tax;
}

WorkingHolidayTaxPayer：

public static double calcTax(double income) {
        double Tax = 0;
        if (income < 37001) {
            Tax = income * (15 / 100);
        } else if (income >= 37001 && income < 90001) {
            Tax = 5550 + income * (32.5 / 100);
        } else if (income >= 90001 && income < 180001) {
            Tax = 22775 + income * (37 / 100);
        } else {
            Tax = 56075 + income * (45 / 100);
        }
        return Tax;
    }

@Override
public double calcTax() {
    double Tax = 0;
    if (getIncome() < 37001) {
        Tax = getIncome() * (15 / 100);
    } else if (getIncome() >= 37001 && getIncome() < 90001) {
        Tax = 5550 + getIncome() * (32.5 / 100);
    } else if (getIncome() >= 90001 && getIncome() < 180001) {
        Tax = 22775 + getIncome() * (37 / 100);
    } else {
        Tax = 56075 + getIncome() * (45 / 100);
    }
    return Tax;
}

我的问题是试图将这些对象的所有应纳税额加在一起。我已经尝试过for循环，但是由于它们不是静态的而无法从其他类中调用方法，或者当它们处于静态状态时，它带有“在对象d中找不到变量收入/方法getIncome（）”。

感谢您的帮助！

Answer 1

有多种解决方法。首先，您可以这样做：

ArrayList<Double> array = new ArrayList<>();
double income = TaxPayer.getIncome();

array.add(a1.calcTax(income));
array.add(b1.calcTax(income));
array.add(c1.calcTax(income));

double totalTaxPayable = 0;
for (int i = 0; i < array.size(); i++) {
    totalTaxPayable=+ array.get(i);
}
System.out.println(totalTaxPayable);

或者甚至忘记了ArrayList和 for 循环：

double totalTaxPayable = a1.calcTax(income) + b1.calcTax(income) + c1.calcTax(income);
System.out.println(totalTaxPayable);

您还可以向每个类（ taxValue ）添加双精度类型的Member变量，并在每个类中使用 Getter 方法（ getTaxValue（））来保存税额，然后从实例而不是方法调用中获得所需的值（必须由构造函数执行方法调用），只需将收入传递给每个Class构造函数即可。返回的有符号值表示欠您的款项，而无符号的值返回表示您欠的款项：

double totalTaxPayable = a1.getTaxValue() + b1.getTaxValue() + c1.getTaxValue();

计算应纳税额

1 个答案: