Question

In Chapter 8, Programming Exercise 6 you created a Salesperson class with fields for an ID number and sales values. Now, create an application that allows a user to enter values for an array of seven Salesperson objects. Offer the user the choice of displaying the objects in ascending order by either (I)D number or (S)ales value.
An example of the program is shown below:

Enter an ID number
100
Enter sales value
250
Enter an ID number
101
Enter sales value
500.25
Enter an ID number
103
Enter sales value
600.50
Enter an ID number
106
Enter sales value
78
Enter an ID number
105
Enter sales value
80.2
Enter an ID number
102
Enter sales value
45.68
Enter an ID number
104
Enter sales value
120
By which field do you want to sort?
(I)d number or (S)ales
I

ID 100 sales: 250.0
ID 101 sales: 500.25
ID 102 sales: 45.68
ID 103 sales: 600.5
ID 104 sales: 120.0
ID 105 sales: 80.2
ID 106 sales: 78.0

Answer 1

Using the knowldge in computional language in Java it is possible to write a code that create an application that allows a user to enter values for an array of seven Salesperson objects.

Writing the code in Java

import java.util.*;

public class Salesperson

{

private int ID;

private double annualSales;

public Salesperson(int ID, double annualSales)

{

this.ID = ID;

this.annualSales = annualSales;

}

public int getID()

{

return ID;

}

public void setID(int ID)

{

this.ID = ID;

}

public double getAnnualSales()

{

return annualSales;

}

public void setAnnualSales(double annualSales)

{

this.annualSales = annualSales;

}

public String toString()

{

return "Salesperson ID: " + ID + ", annual sales: " + annualSales;

}

}

// you created a Salesperson class with fields for an ID number and sales values. Now,

// create an application that allows a user to enter values for an array of seven Salesperson objects.

// Offer the user the choice of displaying the objects in order by either ID number or sales value.

// Save the application as SalespersonSort.java

public class SalespersonSort

{

public static void main(String[] args)

{

Salesperson[] array = new Salesperson[7];

Scanner in = new Scanner(System.in);

for(int i=0; i<array.length; i++){

System.out.print("\nEnter ID number of Sales Person "+ (i+1) + " :");

int ID = in.nextInt();

System.out.print("\nEnter Annual Sales of Sales Person "+ (i+1) + " :");

double sales = in.nextDouble();

array[i] = new Salesperson(ID,sales);

}

System.out.println("Do you want to sort by ID or sales? (Enter ID or sales):");

String choice = in.next();

if(choice.equalsIgnoreCase("ID")){

for(int i=0; i<array.length; i++){

int min = i;

for(int j=i; j<array.length; j++){

if(array[j].getID() < array[min].getID())

min = j;

}

Salesperson temp = array[i];

array[i] = array[min];

array[min] = temp;

}

System.out.println("Sales sorted by ID are ");

for(int i=0; i<array.length; i++)

System.out.println(array[i]);

}

else{

for(int i=0; i<array.length; i++){

int min = i;

for(int j=i; j<array.length; j++){

if(array[j].getAnnualSales() < array[min].getAnnualSales())

min = j;

}

Salesperson temp = array[i];

array[i] = array[min];

array[min] = temp;

}

System.out.println("Sales sorted by Annual Sales are ");

for(int i=0; i<array.length; i++)

System.out.println(array[i]);

}

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