public class Main {
public static void main(String[] args) {
// 给一个有普通收入、工资收入和享受国务院特殊津贴的小伙伴算税:
Income[] incomes = new Income[] {
new Income(3000),
new Salary(7500),
new StateCouncilSpecialAllowance(15000)
};
System.out.println(totalTax(incomes));
}
public static double totalTax(Income... incomes) {
double total = 0;
for (Income income: incomes) {
total = total + income.getTax();
}
return total;
}
}
class Income {
protected double income;
public Income(double income) {
this.income = income;
}
public double getTax() {
return income * 0.1; // 税率10%
}
}
class Salary extends Income {
public Salary(double income) {
super(income);
}
@Override
public double getTax() {
if (income <= 5000) {
return 0;
}
return (income - 5000) * 0.2;
}
}
class StateCouncilSpecialAllowance extends Income {
public StateCouncilSpecialAllowance(double income) {
super(income);
}
@Override
public double getTax() {
return 0;
}
}
在这段中有 public static double totalTax(Income... incomes) {
double total = 0;
for (Income income: incomes) {
total = total + income.getTax();
}
一段我不是十分理解，通过百度查阅。
我了解到...号是用来代替多个参数的办法
在前面的Income是定义了类
...表示多个参数
具体内容参考https://www.cnblogs.com/fnlingnzb-learner/p/5952716.html
https://bbs.csdn.net/topics/360212584?list=249042
可变参数如何对应
