test3

Class ItemizedBill

java.lang.Object

test3.ItemizedBill

public class ItemizedBill
extends Object

A bill that includes an itemized list of purchased items, the date that the bill was created, and a total price of all of the items in the bill. The itemized bill and its list form a composition. The itemized bill and its date form a composition. The total price of the bill is guaranteed to be equal to the sum of the prices of the items in the bill.

Author:

EECS2030 Winter 2016-17

Constructor Summary

Constructors

Constructor and Description
ItemizedBill() Initialize this bill so that its total is zero, its list of items is empty, and its date is the current date.
ItemizedBill(ItemizedBill other) Initialize this bill by copying another bill.
ItemizedBill(List<Item> items) Initialize this bill from a list of purchased items.

Method Summary

Modifier and Type	Method and Description
void	addItem(Item item) Add an item to the list of items purchased for this bill.
boolean	equals(Object obj) Compares two itemized bills for equality.
Date	getDate() Returns a copy of the date for when this bill was issued.
List<Item>	getItems() Returns the list of items purchased for this bill.
List<Item>	getSortedItems() Returns a sorted list of items purchased for this bill.
int	getTotal() Returns the total price of the bill.
int	hashCode() Returns a hash code for this bill.
void	setTotal(int total) Set the total price of the bill.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ItemizedBill

public ItemizedBill()

Initialize this bill so that its total is zero, its list of items is empty, and its date is the current date.

ItemizedBill

public ItemizedBill(List<Item> items)

Initialize this bill from a list of purchased items. The total price of the bill is computed as the sum of the prices of the purchased items. The date of issue is the current date. The list of items is deep copied.

Parameters:

items - a list of purchased items

ItemizedBill

public ItemizedBill(ItemizedBill other)

Initialize this bill by copying another bill. The total price of the bill, the date of issue, and the list of items purchased are all copied from the other bill. The list of items is a deep copy of the list of items of the other bill.

Parameters:

other - the bill to copy

Method Detail

getItems

public List<Item> getItems()

Returns the list of items purchased for this bill. The returned list cannot be used to modify this bill, and the items in the returned list cannot be used to modify the items belonging to this bill.

Returns:

the list of items purchased for this bill

addItem

public void addItem(Item item)

Add an item to the list of items purchased for this bill. The total price of the bill is updated to include the price of the added item.

Parameters:

item - add an item to the list of items purchased for this bill

getSortedItems

public List<Item> getSortedItems()

Returns a sorted list of items purchased for this bill. The list is a deep copy of the list belonging to this bill. Items are sorted as specified in Item.compareTo.

Returns:

the sorted list of items purchased for this bill

getTotal

public final int getTotal()

Returns the total price of the bill.

Returns:

the total price of the bill

setTotal

public final void setTotal(int total)

Set the total price of the bill.

Parameters:

total - the total price of the bill

Throws:

IllegalArgumentException - if the total is less than zero

getDate

public final Date getDate()

Returns a copy of the date for when this bill was issued.

Returns:

a copy of the date for when this bill was issued

hashCode

public int hashCode()

Returns a hash code for this bill.

Overrides:

hashCode in class Object

Returns:

a hash code for this bill

See Also:

Object.hashCode()

equals

public boolean equals(Object obj)

Compares two itemized bills for equality. The result is true if and only if the argument is not null and is an ItemizedBill object that has:

• the same total price as this itemized bill
• the same date of issue as this itemized bill
• the same list of items purchased ignoring the order in which items appear in the list

equals does not modify the list of items in this bill.

Overrides:

equals in class Object

Parameters:

obj - the object to compare this item against

Returns:

true if the given object represents an ItemizedBill equivalent to this bill, false otherwise