java 实现个税计算器

好的，下面是一个使用 Java 实现个税计算器的示例代码：

import java.util.Scanner;

public class IncomeTaxCalculator {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入税前工资：");
        double salary = scanner.nextDouble();
        System.out.print("请输入社保公积金：");
        double socialSecurity = scanner.nextDouble();
        System.out.print("请输入专项扣除：");
        double deduction = scanner.nextDouble();
        double taxableIncome = salary - socialSecurity - deduction - 5000;
        double tax = 0;
        if (taxableIncome <= 0) {
            tax = 0;
        } else if (taxableIncome <= 3000) {
            tax = taxableIncome * 0.03;
        } else if (taxableIncome <= 12000) {
            tax = taxableIncome * 0.1 - 210;
        } else if (taxableIncome <= 25000) {
            tax = taxableIncome * 0.2 - 1410;
        } else if (taxableIncome <= 35000) {
            tax = taxableIncome * 0.25 - 2660;
        } else if (taxableIncome <= 55000) {
            tax = taxableIncome * 0.3 - 4410;
        } else if (taxableIncome <= 80000) {
            tax = taxableIncome * 0.35 - 7160;
        } else {
            tax = taxableIncome * 0.45 - 15160;
        }
        System.out.println("应缴纳个人所得税：" + String.format("%.2f", tax) + " 元");
    }
}

在这个示例代码中，我们使用了 Java 的 Scanner 类来接收用户输入的税前工资、社保公积金和专项扣除等信息，并计算出应缴纳的个人所得税金额。计算个人所得税的公式与 HTML 表单的示例代码中的相同。通过使用 `String.format()` 方法来保留两位小数输出结果。