a$.$ Change it so that it uses JoptionPanes for input and output instead of Scanners

b$.$ Rename it PetFoodFin

c$.$ Prompt the user for the pet food grade AND the number of pounds they want to purchase

d$.$ Calculate the bill for the purchase by multiplying the price per$-$pound by the pounds purchased

f$.$ Your program should handle the possibility that users might enter lower case characters for the pet food grade

to

purchase. In this method declare an icon using the image puppy.jpg and a String array that contains the following elements:

average sales'

value. In this method declare an icon using the image puppy.jpg and a String array that contains the following elements:

i$.$ Create a class named PetFood using the UML diagram below:.

j$.$ Use the PetFood class in your main method as well as the Average class to accumulate, count and average total purchases.

k$.$ The switch expression will be contained in the getPrice$()$ method

that says "Invalid

choice!".

import java.util.Scanner;

public class PetFoodArrow

$\{$

public static void main$($String$[]$ args$)$

$\{$

String input $=""$;

char foodGrade $=\text{'}\text{'}$;

foodGrade $=$ getInput$()$;

while$($foodGrade $!=\text{'}$X$\text{'})$

$\{$

input $=$ getGrade$($foodGrade$)$;

prinout$($foodGrade$,$ input$)$;

foodGrade $=$ getInput$()$;

$\}$

input $="$

End of the program!

$"$;

prinout$($foodGrade$,$ input$)$;

$\}$

$/*$

Methods' Definitions

$*/$

public static char getInput$()$

$\{$

String$[]$ mssgs $=\{$ "Our pet food is available in grades A$,$ B$,$ and C$.",$

"Which do you want pricing for? $\{$X to stop$\}$: $"\}$;

Scanner keyboard $=$ new Scanner$($System$.$in$)$;

System.out.print$($mssgs$[0]+($char$)10+$ mssgs$[1])$;

return keyboard.nextLine$().$toUpperCase$().$charAt$(0)$;

$\}$

public static String getGrade$($char fudGrade$)$

$\{$

String iO $=""$;

String$[]$ messash $=\{"$

Food grade $","$ costs $30$ cents per lb$.$

$",$

$"$ costs $20$ cents per lb$.$

$","$ costs $15$ cents per lb$.$

$",$

$"$

Invalid choice.

$"\}$;

iO $=$ switch$($fudGrade$)$

$\{$

case $\text{'}$A$\text{'}->$ messash$[0]+$ fudGrade $+$ messash$[1]$;

case $\text{'}$B$\text{'}->$ messash$[0]+$ fudGrade $+$ messash$[2]$;

case $\text{'}$C$\text{'}->$ messash$[0]+$ fudGrade $+$ messash$[3]$;

default $->$ messash$[4]$;

$\}$;

return iO;

$\}$

public static void prinout$($char fudGr, String incoming$)$

$\{$

if$($fudGr $!=\text{'}$X$\text{'})$

System.out.println$($incoming$)$;

else

System.out.println$($incoming$)$;

$\}$

$\}$

$/**$

Average class

$*/$

public class Average

$\{$

private double akkum;

private int Count;

public Average$()//$ Constructor; initializes the class fields

$\{$

akkum $=0\mathrm{.}0$;

Count $=0$;

$\}$

public void setSum$($double num$1)//$ Mutator Method $($Setter$)$

$\{$

akkum $+=$ num$1$; $//$ This double field is accumulating the values of the numbers entered

$\}$

public void setCount$()//$ Mutator Method $($Setter$)$

$\{$

Count$++$; $//$ This integer counts how many values have been read

$\}$

public double getSum$()//$ Accessor Method $($Getter$)$

$\{$

return akkum; $//$ This double value represents the sum of all the numbers to be averaged

$\}$

public int getCount$()//$ Accessor Method $($Getter$)$

$\{$

return Count; $//$ This integer value represents how many numbers have been entered

$\}$

public double getAvg$()//$ Accessor Method $($Getter$)$

$\{$

return akkum $/$ Count; $//$ This double value represents the calculated Average; prevents stale data

$\}$

$\}$