Package Model

Class WrittenBills

java.lang.Object

Model.WrittenBills

public class WrittenBills
extends Object

The WrittenBills class represents a collection of utility bills stored in a file.

Field Summary

Fields

Modifier and Type	Field	Description
private ArrayList<UtilityBill>	bills	The list of utility bills.
private String	billsFilePath	The path of the file containing the utility bills.
private int	id	The ID of the utility bill.

Constructor Summary

Constructors

Constructor	Description
WrittenBills()	Constructs a WrittenBills instance, initializing the list of bills and loading existing bills from a file.

Method Summary

Modifier and Type	Method	Description
void	addBill(String username, String utilityType, double meterMeasurement, String date)	Adds a utility bill for the Customer.
void	deleteBill(int billId)	Deletes a utility bill for the Customer.
void	editBill(int billId, Double newMeterMeasurement)	Edits a utility bill for the Customer.
UtilityBill	findbill(int billId)	Finds a utility bill by its ID.
boolean	findiD(int id)	Finds a utility bill by its ID.
ArrayList<UtilityBill>	getBills()	Gets the list of utility bills.
void	increaseID()	Increases the ID of the utility bill.
void	loadBillsFromFile()	Loads utility bills from a file.
private void	saveBillsToFile()	Saves the utility bills to a file.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

bills

private ArrayList<UtilityBill> bills

The list of utility bills.

billsFilePath

private String billsFilePath

The path of the file containing the utility bills.

id

private int id

The ID of the utility bill.

Constructor Details

WrittenBills

public WrittenBills()

Constructs a WrittenBills instance, initializing the list of bills and loading existing bills from a file.

Method Details

getBills

public ArrayList<UtilityBill> getBills()

Gets the list of utility bills.

Returns:

ArrayList of UtilityBill representing the bills.

loadBillsFromFile

public void loadBillsFromFile()

Loads utility bills from a file.

findiD

public boolean findiD(int id)

Finds a utility bill by its ID.

Parameters:

id - The ID of the bill to be found.

addBill

public void addBill(String username,
 String utilityType,
 double meterMeasurement,
 String date)

Adds a utility bill for the Customer.

Parameters:

username - The username of the Customer.

utilityType - The type of utility.

meterMeasurement - The meter measurement.

date - The date of the bill.

increaseID

public void increaseID()

Increases the ID of the utility bill.

deleteBill

public void deleteBill(int billId)

Deletes a utility bill for the Customer.

Parameters:

billId - The ID of the bill to be deleted.

editBill

public void editBill(int billId,
 Double newMeterMeasurement)

Edits a utility bill for the Customer.

Parameters:

billId - The ID of the bill to be edited.

newMeterMeasurement - The new meter measurement.

findbill

public UtilityBill findbill(int billId)

Finds a utility bill by its ID.

Parameters:

billId - The ID of the bill to be found.

saveBillsToFile

private void saveBillsToFile()

Saves the utility bills to a file.