A store owner keeps a record of daily transactions in a text file. Each line contains three items: The invoice number, the cash amount, and the letter P if the amount was paid or R if the amount was received. Items on each line are separated by spaces. Wri te a program that prompts the store owner for the amount of cash at the beginning of the day and for the amount of cash at the end of the day, as well as the name of the ledger text file. Your program should calculate if the actual amount of cash at the en d of the day equals the expected value. If an error is found while reading the text file, the user should be allowed to choose another file

Answer explained below

Explanation:

Java Program:

package ledger;

import java. util.*;

import java. io.*;

public class Ledger {

//Main method

public static void main (String[] args) throws FileNotFoundException {

String fileName;

try

{

//Reading file name

fileName = getFileName ();

//Processing file

processFile (fileName);

}

catch (Exception ex)

{

//Reading file name

fileName = getFileName ();

//Processing file

processFile (fileName);

}

}

//Reading file name

public static String getFileName ()

{

String fileName;

Scanner sc = new Scanner (System. in);

//Prompting user for file name

System. out. print ("/n/n Enter ledger text file name: ");

//Reading and storing file name

fileName = sc. nextLine ();

return fileName;

}

//Method that process the file

public static void processFile (String fileName) throws FileNotFoundException

{

//Scanner class object for reading file

Scanner reader = new Scanner (new File (fileName));

double startingBalance, endingBalance, amount, balance;

String transactionType, invoiceNum;

//Scanner class object

Scanner sc = new Scanner (System. in);

//Reading starting balance

System. out. print ("/n Enter Starting Balance: ");

startingBalance = sc. nextDouble ();

//Reading ending balance

System. out. print ("/n Enter Ending Balance: ");

endingBalance = sc. nextDouble ();

//Initiall balance is starting balance

balance = startingBalance;

//Reading data

while (reader. hasNext ())

{

//Reading invoice number

invoiceNum = reader. next ();

//Reading amount

amount = reader. nextDouble ();

//Reading transaction type

transactionType = reader. next ();

//For Paid transactions

if (transactionType. equalsIgnoreCase ("P"))

{

balance = balance - amount;

}

//For Received transactions

else

{

balance = balance + amount;

}

}

System. out. println ("/n/n Ledger Balance: " + balance);

//Closing file

reader. close ();

//Comparing ending balance

if (balance = = endingBalance)

{

System. out. println ("/n Actual amount matches with the expected value ... / n");

}

else

{

System. out. println ("/n Sorry! Actual amount doesn't match with the expected value ... / n");

}

}

}