Question

Java I - Write a program that will use static methods as described in the specifications below. Utilizing the if and else statements, write a program which will calculate a commission based on a two-tiered commission plan of 2% and 5% paid on amounts of $10,000 or less, or over $10,000 in monthly sales by a sales force paid on a commission basis. Use the output specifications below.

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(Please make detailed comments so I can better understand the code. Thank you!)

Specifications

• There will be two classes (separate files) in this program. The class containing the main method will be called Commission. All methods will be called from the main method. The second class (file) will be calledComCalc and will contain all of the methods created below.

• Prompt the user to input the total monthly sales. That number will be input from the keyboard.

• Commission is paid at the rate of 2% on any amount of $10,000 or less, in sales. Anyone selling over $10,000 is paid at the rate of 5% on the total monthly sales amount.

• Use the if, else if, and else statements where necessary, to determine the appropriate rate for the amount of the total monthly sales, then calculate the commission following the if/else structure.

• Output the commission rate, total monthly sales amount, and the commission amount and use appropriate labels for each (see output format below).

• Use text labels on the output which make it clear what information is being displayed. Do not simply use single words like Commission or Total. Single words such as those are not descriptive enough.

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Constructing the Methods

Create the following methods in the CommCalc class (separate file):

1. inputTotalSales()

   • This method will display a prompt for the user to enter the total amount of the monthly sales.

   • This method will return the amount of the monthly sales that the user entered.

   • This method does not have parameters.

2. setCommRate()

   • This method will accept an argument which will be the total monthly sales amount entered by the user and returned to the main method.

   • This method will determine the appropriate commission rate based on whether the monthly sales were over $10,000 or not. Setting the commission rate will be its only task.

   • This method will return the commission rate.

3. calcCommAmount()

   • This method will accept the commission rate and the amount of monthly sales entered by the user and returned to the main method, and will calculate the amount of the commission.

   • This method will return the amount of commission.

4. displayCommResults()

   • This method will accept the sales amount, the commission rate, and the amount of commission sent from the mainmethod.

   • This method will display the three items above with the output labels shown in the Output Format below.

   • This will be a void method

Answer 1

//ComCal.java

import java.util.Scanner;

public class ComCalc {
public double inputTotalSales() {
   double sale;
   Scanner in = new Scanner(System.in);
   System.out.print("Enter the total amount of the monthly sales : ");
   sale = in.nextDouble();
   in.close();
   return sale;
}
  
public double setCommRate(double sale) {
   if(sale<=10000)return 0.02;
   return 0.05;
}
public double calcCommAmount(double commissionRate,double sale) {
   return commissionRate*sale;
}
public void displayCommResults(double sale , double commissionRate , double commission) {
   System.out.println("Sales amount : $"+sale);
   System.out.println("commission Rate : "+commissionRate);
   System.out.println("commisssion Amount : $"+commission);
}
}
//Commission.java

import array.ComCalc;

public class Commission {
   public static void main(String args[]) {
       ComCalc cal = new ComCalc();
       double sale;
       double commissionRate;
       double commission;
      
       sale = cal.inputTotalSales();
       commissionRate = cal.setCommRate(sale);
       commission = cal.calcCommAmount(commissionRate, sale);
       cal.displayCommResults(sale, commissionRate, commission);
      
   }
}
//sample output

sterminated> Commission [Java Application] C:Program Files Javaljdk1.8.0_151 Enter the total amount of the monthly sales 100001 Sales amount $100001.0 commission Rate 0.05 commiss 00.05 sion Amount $50