java税收问题

学Java以来写的第一个函数------税收问题

在我国，个人所得税是基于纳税人的情况和应征收人计算的。纳税人情况共分为三种：单身纳税人、已婚纳税人和家庭纳税人。另外，对于不同情况的纳税人，其税率是分档计算的，我国2008年的个人所得税税率如下表所示。

import java.util.Scanner;
public class Tax2
{

public static double Income(){     //返回值类型为double

	double income = 0;
	System.out.println("请输入可征税收入");
	Scanner in = new Scanner(System.in);
	if(in.hasNextDouble())       //in.hasNextDouble判断输入的值是否为double型
		 income = in.nextDouble();     //是就执行此步骤，不是则跳过

		return income;
}

public static void main(String[] args)
{
double income = Income();
int status = 0;
double tax = 0;
System.out.println(“请输入纳税人的类型”);
Scanner inStatus = new Scanner(System.in);
if(inStatus.hasNextInt())
{
status = inStatus.nextInt();
}

	if(status == 0)
	{
		if(income <=6000)
			tax = income * 0.10;
		else if(income <= 27950)
			tax = 6000 * 0.10 + (income - 6000) * 0.15;
		else if(income <= 67700)
			tax = 6000 * 0.10 + (27950 - 6000) * 0.15 + (income - 27950) * 0.27;
		else if(income <=141250)
			tax = 6000 * 0.10 + ( 27950 - 6000) * 0.15 + (67700 - 27950) * 0.27 + (income - 67700) * 0.30;
		else
			tax = 6000 * 0.10 + ( 27950 - 6000) * 0.15 + (67700 - 27950) * 0.27 + (141250 - 67700) * 0.30 + (income - 141250) * 0.35;
	}
	else if(status==1){
		if(income<=12000)
		tax = income * 0.10;
		else if(income<=46700)
		tax = 12000*0.10 + (income - 6000)*0.15;
		else if(income<=112850)
		tax = 12000*0.10 +  (46700 - 12000)*0.15 + (income - 46700) *0.27;
		else if(income<=171950)
		tax = 12000*0.10 + (46701 - 12000)*0.15  + (112850 - 46701) *0.27 + (income - 112850)*0.30;
		else
		tax = 12000*0.10 + (46701 - 12000)*0.15  + (112850 - 46701) *0.27 + (171950 - 112850)*0.30 + (income - 171905)*0.35;
	}
	else if(status==2){
		if(income<=10000)
		tax = income * 0.10;
		else if(income<=37450)
		tax = 10000*0.10 + (income - 10000)*0.15;
		else if(income<=96700)
		tax = 10000*0.10 + (37450 - 10000)*0.15 + (income - 37450) *0.27;
		else if(income<=156600)
		tax = 10000*0.10 + (37450 - 10000)*0.15 + (96700 - 37450) * 0.27 + (income - 96700)*0.30;
		else
		tax = 10000*0.10 + (37450 - 10000)*0.15 + (96700 - 37450) * 0.27 + (156600 - 96700)*0.30 + (income - 156600)*0.35;
	}
         System.out.println("纳税人需要交税额为" + tax +"￥");
}

}

总结：内容较为简单，只是过程比较繁琐，但还需多加练习才能够熟练掌握自定义函数。