Question

当我运行我的程序时，年度销售示例以$结尾，而不是以$开头，只有1位小数。此外，我无法弄清楚必须在数字中添加逗号。我是Java的初学者，所以我不是很熟练。

package salesman1;
/*
 * Annual Compensation Program
 * Created by: Big Werd
 *This program calculates the total compensation for a sales person based on the
 *amount of the yearly fixed income and the annual commission that was earned.
*/

public class Salesman1 {
    // fixed salary variable
     double fixedSalary;
     // amount of the annual sales for the salesman
     double  annualSales;
     //commission that was earned
     double commission;
     //The current sales goal
     double target;
     public Salesman1(double annualSales){
         this.annualSales=annualSales;
         target=120000;
         commission=0;
         if(annualSales>target*0.8){
            if(annualSales<target)commission=0.15*annualSales;//15% Commission is earned annually
            else commission=0.15*1.25*annualSales;//The acceleration factor is 1.25 
         }
         fixedSalary=35000;// set fixed salary is $35,000
     }
     public double getTotalAnnualCompensation(){// Fixed salary added to the commission earned for a calculation of the total compensation.
         return fixedSalary+commission;
     }
}

package salesman1;


import java.util.Scanner;

/*
 * Annual Compensation Program
 * Created by: James Werderman
 *This program calculates the total compensation for a sales person based on the
 *amount of the yearly fixed income and the annual commission that was earned.
 */

public class Calculator {
    public static void main(String args[]){
        double annualSales;
        Salesman1 person;
        Scanner input=new Scanner(System.in);
        System.out.print("What were the total annual sales?: ");// Requests the annual sales amount
        annualSales=input.nextDouble();
        person=new Salesman1(annualSales);// creates a salesperson
        System.out.println(" The total annual compensation: "+String.format("%.2f", person.getTotalAnnualCompensation())+"$");
        System.out.println(" Total Sales Amount           Total Compensation Amount");
        annualSales=annualSales+5000;
        for(int i=0;i<11;i++){
            person=new Salesman1(annualSales);
             System.out.println(annualSales+"$                "+String.format("%.2f", person.getTotalAnnualCompensation())+"$");
            annualSales+=5000;
        }
    }
}

Answer 1

首先，您使用$

为结果添加后缀

System.out.println(annualSales + "$

这意味着将首先打印annualSales值，然后打印$符号，切换它们

System.out.println("$" + annualSales + "

你也可以做点像......

System.out.printf(" $%17.2f | $%24.2f%n", annualSales, person.getTotalAnnualCompensation());

相反，这将打印类似

的内容

 Total Sales Amount | Total Compensation Amount
 $          6000.00 | $                35000.00
 $         11000.00 | $                35000.00
 $         16000.00 | $                35000.00
 $         21000.00 | $                35000.00
 $         26000.00 | $                35000.00
 $         31000.00 | $                35000.00
 $         36000.00 | $                35000.00
 $         41000.00 | $                35000.00
 $         46000.00 | $                35000.00
 $         51000.00 | $                35000.00
 $         56000.00 | $                35000.00

现在，我不喜欢这个，我喜欢文本旁边的$

相反，我可能会想做更像......的事情。

System.out.printf(" %18s | %25s%n", 
                        NumberFormat.getCurrencyInstance().format(annualSales), 
                        NumberFormat.getCurrencyInstance().format(person.getTotalAnnualCompensation()));

哪个打印......

 Total Sales Amount | Total Compensation Amount
          $6,000.00 |               $35,000.00
         $11,000.00 |               $35,000.00
         $16,000.00 |               $35,000.00
         $21,000.00 |               $35,000.00
         $26,000.00 |               $35,000.00
         $31,000.00 |               $35,000.00
         $36,000.00 |               $35,000.00
         $41,000.00 |               $35,000.00
         $46,000.00 |               $35,000.00
         $51,000.00 |               $35,000.00
         $56,000.00 |               $35,000.00

现在，您可以使用NumberFormat.getInstance来混合使用这两种方法，这样您就可以获得左边的$和右边的数字格式，但是＆＃ 39;由你决定...

您可能需要查看at this tutorial，其中提供了有关String格式规范的更多详细信息

如何为我的Java程序添加正确的数字格式

1 个答案: