我如何编写一段时间条款以通过扫描仪类识别初始输入？ [重复]

Question

import java.text.DecimalFormat; 
import java.util.Scanner;
public class Abramyan_week5b{
   public static void main( String[] args){
      double vehiclePrice, vehicleMileage, vehicleAge, vehicleCond, deprPerMile, mileDepr, condPct, condDepr, appraisedPrice;
      Scanner k = new Scanner(System.in);
      DecimalFormat df1 = new DecimalFormat("#,##0.00");
         System.out.print("Enter the purchasing price of the vehicle = ");
         vehiclePrice = k.nextDouble();
         System.out.print("Enter the current mileage of the vehicle  = ");
         vehicleMileage = k.nextDouble();
         System.out.print("Enter the age of the vehicle in years = ");
         vehicleAge = k.nextDouble();
         System.out.print("Enter the vehicle condition ('1' for clean, '2' for average and '3' for rough) = ");
         vehicleCond = k.nextDouble();
      while ((vehicleCond != 1) || (vehicleCond != 2) || (vehicleCond != 3)){
         System.out.print("Enter the vehicle condition ('1' for clean, '2' for average and '3' for rough) = ");
         vehicleCond = k.nextDouble();  
         if (vehicleCond == 1){
            condPct = 0.02;
            break;
         }
         else if (vehicleCond == 2){
            condPct = 0.03;
            break;
         }
         else if (vehicleCond == 3){
            condPct = 0.04;
            break;
         } 
      }
      if (vehiclePrice > 60000)
         deprPerMile = 0.6; 
      else if (vehiclePrice > 40000)
         deprPerMile = 0.5; 
      else if (vehiclePrice > 30000)
         deprPerMile = 0.4; 
      else if (vehiclePrice > 20000)
         deprPerMile = 0.3;
      else
         deprPerMile = 0.2;
      if (vehicleCond == 1)
         condPct = 0.02;
      else if (vehicleCond == 2)
         condPct = 0.03;
      else
         condPct = 0.04;
      mileDepr = vehicleMileage * deprPerMile;
      condDepr = vehiclePrice * vehicleAge * condPct;
      appraisedPrice = vehiclePrice - mileDepr - condDepr;
      System.out.println(" The depreciated value of the vehicle for mileage is $" + df1.format(mileDepr));
      System.out.println(" The depreciated value of the vehicle for the condition is $" + df1.format(condDepr));
      System.out.println(" The current appraised value of the vehicle is $" + df1.format(appraisedPrice));
   }
}

您的答案几乎是正确的，要使它起作用，您只需要更改条件，但让我们看看如何改进它。

Answer 1

您可以看到，我将代码从main中取出，并将其放在一种称为

-startprogram

的方法中。在这种情况下，效果并不那么明显，因为没有属性或其他方法，如果有任何属性或其他方法，则必须将其声明为

static

，如果代码在main。 将几个带有数组的几个Double变量重新定位，并且通过这种方式，我也使用forfor.来限制重复代码。

在

中仅让wevehiclecond实例化。 是相等的（替换对vehiclePrice，vehiclemileage的参考和vehicleage

vEhicleage

vervalues[0]，vehiclevalues [1]和vehiclevalues [1]和pehicleValues [2][2]

）。