Exercise $2[60$ marks$]$

This exercise follows on from the previous. It concerns writing a program called

$$MarketPlace$.$java$$ that creates a collection of Seller objects from a data file, and then

searching for and printing those that sell a product meeting the user's criteria for quantity and price.

The program will ask the user to enter the name of a "Comma Separated Values" $($CSV$)$ file

containing seller data. The first line of the file will consist of an integer N that represents the

number of sellers.

Each subsequent line will consist of the comma separated values of the attributes for a single seller.

$,,,,$

For example,

$8$

KP$01,$ Kwik Pic, Bolton Hill, Cauliflower, R$10\mathrm{.}00,120$

FM$01,$ Farmers$$ Market, Imizamo Yethu, Lettuce, R$11\mathrm{.}25,132$

BAL$01,$ Buy$-$A$-$lot, Salt River, Concrete Block, R$3,900$

NA$01,$ NotAllot, Claremont, Hot Air, R$99\mathrm{.}99,0$

STWD$01,$ ShopTillWeDrop, Cape Town CBD$,$ Lettuce, R$10\mathrm{.}00,100$

$24$S$01,24-$Seven, Milnerton, Fish fillets, R$21\mathrm{.}50,132$

MM$01,$ Mega Mart, Phillipi, Lettuce, R$13\mathrm{.}00,132$

GNG$01,$ GetnGo, Rantanga Junction, Lettuce, R$9\mathrm{.}00,50$

The program will:

$1.$ Read in and create an array of Seller objects from the data.

$2.$ It will then ask the user to enter the name of a product, the quantity required, and the

maximum that they are willing to pay per unit.

$3.$ It will then search the array, printing out details of those sellers that can meet the

requirements.

If there are no matches, then it will print $$None found.$.$

You will need to use Java arrays and know how to use Scanner objects to process input from file.

Explanations may be found in the appendices at the end of this document.

Version $2024/07/2910$:$13$:$19$

Page $3$ of $7$

Sample IO $($The input from the user is shown in bold font $$ do not program this$)$:

Enter the name of a "Comma Separated Values" $($CSV$)$ file:

sellers.csv

Enter the name of a product:

Lettuce

Enter the number of units required:

$87$

Enter the maximum unit price:

R$12\mathrm{.}00$

FM$01$ : Farmers$$s Market in Imizamo Yethu, has $132$ Lettuce for R$11\mathrm{.}25$ each.

STWD$01$ : ShopTillWeDrop in Cape Town CBD has $110$ Lettuce for R$10\mathrm{.}00$ each.

Sample IO $($The input from the user is shown in bold font $$ do not program this$)$:

Enter the name of a "Comma Separated Values" $($CSV$)$ file: mydata.csv

The file contains no seller data.

Sample IO $($The input from the user is shown in bold font $$ do not program this$)$:

Enter the name of a "Comma Separated Values" $($CSV$)$ file:

shops.csv

Enter the name of a product:

Fire lighters

Enter the number of units required:

$10$

Enter the maximum unit price:

R$5\mathrm{.}00$

None found.private MarketPlace$()\{\}//$ Create an instance of Seller with attributes ID$,$ name, location, product,private static Seller makeSeller$($final String data$)\{$ scanner.useDelimiter$("\backslash \backslash$s$*,\backslash \backslash$s$*")$; return seller;$//$ Read the contents of CSV file into an array.private static Seller$[]$ parseFile$($final String fileName$)$ throws FileNotFoundException $\{$ Seller$[]$ sellers $=$ null; sellers $=$ new Seller$[$Integer$.$parseInt$($inFile$.$nextLine$().$trim$())]$; sellers$[$index$]=$ makeSeller$($inFile$.$nextLine$())$; $\}$ return sellers;public static void main$($final String$[]$ args$)$ throws FileNotFoundException $\{$ System.out.println$("$Enter the name of a $\backslash "$Comma Separated Values$\backslash "($CSV$)$ file:"$)$; $//$ Your Code here$\}$