Question

Rewrite the following program using the DecimalFormat class so that your output looks like that below. Once again, the example is not calculated as 3/10ths of a percent.

Welcome to NIU Investments!

Please enter the amount you would like to invest today: 34543.25

Total Investment: $34,543.25

Service Charge: $22.33

   -------------

Total Amount Due: $34,565.58

Thank you for your investment!

Program:

package org.students;

import java.util.Scanner;

public class NIUInvestments {

   //Declaring constant
   public static final double SCHARGE=0.0006464;
   public static void main(String[] args) {
      
       //Declaring variables
       double total_investment,service_charge,total_amount_due;
      
       //Scanner class object is used read the inputs entered by the user
       Scanner sc=new Scanner(System.in);
       System.out.println("Welcome to NIU Investments!");
      
       //This loop continues to execute until the suer enters a valid number
       while(true)
       {
       //getting the total investment entered by the user.  
       System.out.print("Please enter the amount you would like to invest today:");
       total_investment=sc.nextDouble();
      
       /*Checking the total investment is with the range
       * If not,Display the error message end prompt to enter again
       */
       if(total_investment<0 || total_investment>99999999.99)
       {
       System.out.println("::Invalid Number.Total investment must be greater than 0 and less than 99999999.99 ::");
       continue;
       }
       else
           break;
       }  
       //Calculating the service charge
       service_charge=total_investment*SCHARGE;
      
       //calculating the total amount due
       total_amount_due=total_investment+service_charge;
      
       //Displaying the total investment
       System.out.printf("\nTotal Investment (in dollars):\t%.2f\n",total_investment);
      
       //Displaying the service charge
       System.out.printf(" Service Charge (in dollars):\t%.2f\n",service_charge);
       System.out.println("\t\t-----------");
      
       //Displaying the total amount due
       System.out.printf("Total Amount Due (in dollars):%.2f\n",total_amount_due);
       System.out.println("\nThank you for your investment!");
          

   }

}

____________________________________________

Output:

Welcome to NIU Investments!
Please enter the amount you would like to invest today:34543.25

Total Investment (in dollars):   34543.25
Service Charge (in dollars):   22.33
       -----------
Total Amount Due (in dollars):34565.58

Thank you for your investment!

________________________Thank You

Answer 1

Here 3% percent means 3/100=0.03. where as 3/10th percent means 3/10X100 %=30%..But according to the problem the service charge 22.33 is not 3/10th% of 34543.25 Should I have to Modify.Where as 3/10th% of 34543.25 is 10362.975.

Could you please clarify .So that the output will be accurate.

_______________________

NIUInvestments.java

import java.text.DecimalFormat;
import java.util.Scanner;

public class NIUInvestments {

   //Declaring constant
   public static final double SCHARGE=0.0006464;
   public static void main(String[] args) {
      
       //Declaring variables
       double total_investment,service_charge,total_amount_due;
       DecimalFormat df=new DecimalFormat("#.##");
       //Scanner class object is used read the inputs entered by the user
       Scanner sc=new Scanner(System.in);
       System.out.println("Welcome to NIU Investments!");
      
       //This loop continues to execute until the suer enters a valid number
       while(true)
       {
       //getting the total investment entered by the user.  
       System.out.print("Please enter the amount you would like to invest today:");
       total_investment=sc.nextDouble();
      
       /*Checking the total investment is with the range
       * If not,Display the error message end prompt to enter again
       */
       if(total_investment<0 || total_investment>99999999.99)
       {
       System.out.println("::Invalid Number.Total investment must be greater than 0 and less than 99999999.99 ::");
       continue;
       }
       else
           break;
       }  
       //Calculating the service charge
       service_charge=total_investment*SCHARGE;
      
       //calculating the total amount due
       total_amount_due=total_investment+service_charge;
      
       //Displaying the total investment
       System.out.println("Total Investment :$"+df.format(total_investment));
      
       //Displaying the service charge
       System.out.println(" Service Charge :$ "+df.format(service_charge));
       System.out.println("\t\t-----------");
      
       //Displaying the total amount due
       System.out.println("Total Amount Due:$"+df.format(total_amount_due));
       System.out.println("\nThank you for your investment!");
          

   }

}

______________________________

Output:

Welcome to NIU Investments!
Please enter the amount you would like to invest today:34543.25
Total Investment :$34543.25
Service Charge :$ 22.33
       -----------
Total Amount Due:$34565.58

Thank you for your investment!

__________________________________