How to do: a Java program that matches accounts in a master file(eg: mainmaster.ser) with transactions in a transaction file (transactions.ser) . Use the account number on each file to match the records.

master file (eg: mainmaster.ser) containing details about each account. As transactions occur, data is entered into a transaction file called transactions.ser

apply the transaction amounts to the mainmasterfile and and how to do new file called "newmainmaster.ser"

each file is a sequential file where records are stored in increasing account number order.

Contents of mainmaster file Main Master File Account Number Name

Column of Account #: 100

300

500

700

Name:

Alistair Smith

Susan Tom

Sherin Peter

Bill Samuel

Balance

300.00

200.00

0.00

15.00

Contents of transactions file

Column Transaction File- Account Number

100

300

300

400

1400

Transaction Amount

50.00

100.00

-10.00

100.00

500.00

1. How to define class Transaction that contains an account number and amount for transaction
2. a class Match to perform file matching functionality. This class should have methods that read the mainmaster and transaction files.

-When a match occurs (records with same account number appear in both master file and transaction file) , update the current balance in the master record and add updated records to newmainmaster file.(Account for multiple transaction records with same account number)

-When there's a master record for a particular account but no corresponding transaction record , write the master record to newmainmaster file.

-When there is a transaction record but no corresponding master record print to a log file the message " unmatched transaction record for account number..."the Log file should be a text file called log.txt

1. how to read and display data stored in all these serialized files to help view the results of your file matching process.

// data to put into an account file and a transactions file.

import java.io.IOException;

import java.io.FileOutputStream;

import java.io.ObjectOutputStream;

public class CreateMasterTransactionData{

private static ObjectOutputStream outOldMaster, outTransaction;

public static void main(String[] args)

{

try

{

try

{

// file streams for output files

outOldMaster = new ObjectOutputStream(

new FileOutputStream("mainmasterfile.ser"));

outTransaction = new ObjectOutputStream(

new FileOutputStream("transactions.ser"));

}

catch (IOException io)

{

System.err.println("Error opening the file.");

}

try

{

outOldMaster.writeObject(new Account(

100, "Alistair", "Smith", 300.00));

outOldMaster.writeObject(new Account(

300, "Susan", "Tom", 200.00));

outOldMaster.writeObject(new Account(

500, "Sherin", "Peter", 0.00));

outOldMaster.writeObject(new Account(

700, "Bill", "Samuel", 15.00));

outTransaction.writeObject(

new TransactionRecord(100, 50.00));

outTransaction.writeObject(

new TransactionRecord(300, 100.00));

outTransaction.writeObject(

new TransactionRecord(300, -10.00));

outTransaction.writeObject(

new TransactionRecord(400, 100.00));

outTransaction.writeObject(

new TransactionRecord(1400, 500.00));

}

catch (IOException io)

{

System.out.println("Error writing to the files.");

System.exit(1);

}

}

finally // close the files

{

try

{

if (outTransaction != null)

outTransaction.close();

if (outOldMaster != null)

outOldMaster.close();

}

catch (IOException io)

{

System.err.println("Error closing the files.");

System.exit(1);

}

}

}

} // end class CreateData

 // Serializable Account class for storing records as objects. import java.io.Serializable; public class Account implements Serializable { public static final long serialVersionUID = 1L; private int account; private String firstName; private String lastName; private double balance; // initializes an Account with default values public Account() { this(0, "", "", 0.0); // call other constructor } // initializes an Account with provided values public Account(int account, String firstName, String lastName, double balance) { this.account = account; this.firstName = firstName; this.lastName = lastName; this.balance = balance; } // set account number  public void setAccount(int acct) { this.account = account; } // get account number  public int getAccount() { return account; } // set first name  public void setFirstName(String firstName) { this.firstName = firstName; } // get first name  public String getFirstName() { return firstName; } // set last name  public void setLastName(String lastName) { this.lastName = lastName; } // get last name  public String getLastName() { return lastName; } // set balance  public void setBalance(double balance) { this.balance = balance; } // get balance  public double getBalance() { return balance; } }