为什么在 Java 中使用级联 ifs 时会出错？

Question

我有一个程序可以根据给定的收入将一个人的收入乘以一个系数。它还给出了一个代码 1 或 0，相应地定义了收入范围。乍一看似乎是正确的，但我似乎得到了与我用来计算收入的方法中存在的 if 语句有关的错误。

代码如下：

import java.util.Scanner; 
public class IncomeCalc{
    public void Cal(double inc, int code)
    {
        if( code == 0 )
        {
            if((inc >= 0) && (inc <= 5,000))
            {
                System.out.println("Your tax declaration is "+ inc*0.1);
            }else if((inc >= 5,001) && (inc <= 10,000))
            {
                System.out.println("Your tax declaration is "+ inc*0.15);
            }else if((inc >= 10,001) && (inc <= 20,000))
            {
                System.out.println("Your tax declaration is "+ inc*0.25);
            }else if(inc >= 20,001)
            {
                System.out.println("Your tax declaration is "+ inc*0.35);
            }               
        }
        else if( code == 1 )
        {
            if((inc >= 0) && (inc <= 10,000))
            {
                System.out.println("Your tax declaration is "+ inc*0.1);
            }else if((inc >= 10,001) && (inc <= 20,000))
            {
                System.out.println("Your tax declaration is "+ inc*0.15);
            }else if((inc >= 20,001) && (inc <= 30,000))
            {
                System.out.println("Your tax declaration is "+ inc*0.25);
            }else if(inc >= 30,001)
            {
                System.out.println("Your tax declaration is "+ inc*0.35);
            }               
        } 
    }
    public static void main(String[] args)
    {
        Scanner obj = new Scanner(System.in);
        System.out.println("Enter your annual income");
        double income = obj.nextDouble();
        Scanner obj2 = new Scanner(System.in);
        System.out.println("If you are an individual choose 0 else choose 1 ");
        int decl = obj2.nextInt();

        Cal(income, decl);
    }
}

谢谢！！！

Answer 1

你真的用逗号分隔数字吗？如果是这样，这是您的问题，也不要创建 2 个扫描仪对象，对两个操作使用相同的扫描仪对象。

为什么在 Java 中使用级联 ifs 时会出错？

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