A. Create a class that holds the service description, price and number of minute

Question

A. Create a class that holds the service description, price and number of minutes it takes to perform the service. Include a constructor that requires arguments for all three data fields and three get methods that return one of the data field’s values. Save the class as Service.java

Service Description Price ($) Time(Minutes)

Cut $8.00 15

Shampoo $4.00 10

Manicure $18.00 30

Style $48.00 55

Permanent $18.00 35

Trim $6.00 5

B. Write an application named SalonReport that contains an array to hold six Service objects, and fill it with the data from the above table. Hard code the data from the above table into your program (do not have your program request the user to input the data). Include methods to sort the array of Service objects in ascending order by each of the data fields. Prompt the user for the preferred sort order, and display the list of services in the requested order. Save the program as SalonReport.java.

C. Enhance the program by displaying a menu that asks the user how they want to sort the services menu. 1) Sort by Service Description, 2) Sort by Price, 3) Sort by Time (Minutes), or 0) to Exit. Add a do...while() loop that keeps prompting the user for the next preferred sort order until the user finally chooses “0” to exit.

Explanation / Answer

C.

import java.util.*;
import java.text.*;
import javax.swing.*;
public class SalonReport
{   
private static ArrayList<Service> services = new

ArrayList<Service>();
private static JOptionPane pane;
public static void main(String[] args)
{
// Create the services objects.
services.add(new Service("Cut", 8.00F,

15));
services.add(new Service("Shampoo",

4.00F, 10));
services.add(new Service("Manicure",

18.00F, 30));
services.add(new Service("Style", 48.00F,

55));
services.add(new Service("Permanent",

18.00F, 35));
services.add(new Service("Trim", 6.00F,

5));

pane = new JOptionPane();
boolean quit = false;
String input = "";
int choice = 0;

do
{
// Ask the user how they would like the

list of services sorted.
input = "" +

JOptionPane.showInputDialog(null, "How to

sort? 1) description 2) price 3) time 0) quit");
input = input.trim();

// The user closed the dialog.
if (input.equals("null"))
{
break;
}
else
{
try
{
// Attempt to convert the input into

an integer.
choice = Integer.parseInt(input);

// Sort the services according to the

user's entry.
switch (choice)
{
// Quit.
case 0:
quit = true;
break;

// By description.
case 1:
sortByDescription();
displayServices();
break;

// By price.
case 2:
sortByPrice();
displayServices();
break;

// By duration in minutes.
case 3:
sortByDuration();
displayServices();
break;

// Invalid entry.
default:
pane.showMessageDialog(null,

"Invalid entry. Please enter a number between

0-3.");
break;
}
}
catch (Exception e)
{
pane.showMessageDialog(null,

"Invalid entry. Please enter a number between

0-3.");
}
}
}
while (!quit);
}

/**
* Uses a comparator to sort by description.
*/
private static void sortByDescription()
{
Collections.sort(services,

Service.getDescriptionComparator());
}

/**
* Uses a comparator to sort by price.
*/
private static void sortByPrice()
{
Collections.sort(services,

Service.getPriceComparator());
}

/**
* Uses a comparator to sort by duration in

minutes.
*/
private static void sortByDuration()
{
Collections.sort(services,

Service.getDurationComparator());
}

/**
* Print the sorted services on the screen.
*/
private static void displayServices()
{
String message = "";
for (Service service : services)
{
message += formatPrice(service.getPrice

()) + " - " + service.getDescription() + " (" +

service.getDuration() + " minutes)" + " ";
}
pane.showMessageDialog(null, message);
}

/**
* Returns a formatted currency string based

on a float value.
*/
private static String formatPrice(float price)
{
DecimalFormat decimalFormat = new

DecimalFormat();
decimalFormat.setMaximumFractionDigits

(2);
decimalFormat.setMinimumFractionDigits

(2);
return "$" + decimalFormat.format(price);
}
}

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