Consider a class that keeps track of the sales of an item. An object of this
class will have the following private
attributes:
numberSold
- An int
that holds the total number of items sold.
totalSales
- A double
that holds the total amount of sales in
dollars.
totalDiscounts
- A double
that holds the total amount of discounts
given in dollars.
itemCost
- A double
that holds the cost of each item in
dollars.
bulkQuantity
- An int
that holds the minimum number of items
that must be bought in one sale in order for the bulkDiscountPercent
to apply.
bulkDiscountPercent
- A double
that indicates the discount
percentage that a customer receives when they purchase a number of items greater
than or equal to bulkQuantity
.
And the following methods:
ItemSales()
- Default constructor
ItemSales(double itemCost)
- Constructor that initializes
the itemCost.
ItemSales(double itemCost, int bulkQuantity, double bulkDiscountPecent)
-
Constructor that initializes itemCost, bulkQuatity and discoutPercentage.
ItemSales(int bulkQuantity, double bulkDiscountPercent)
- Constructor the
initializes bulkQuatity and discoutPercentage.
registerSale(n)
Records the sale of n
items.
If n
is equal to or larger than the bulk quatity, the cost per item
will be reduced by the bulk discount.
displaySales()
Displays the number sold, the total sales, and total
discount.
equals(ItemSales otherItem)
- Compare two ItemSales objects
for equality. They will be considered equal if all the attributes are equal.
get
, and set
methods for all attributes.
Implement this class in Java and write another class to test it. Make sure you test all the possibilities.
Name these programs ItemSales & ItemSalesDemo
Place both classes in the edu.cuny.lehman.cmp326 package.
Consider a class that maintains an array of int's. The class has the following private attributes:
INITIAL_ARRAY_SIZE
- a constant set to 10
ARRAY_EXPAND
- a constant set to 20
myInts
- an array of int's that is initialized to
INITIAL_ARRAY_SIZE with all the entries set to zero.
currentInt
- an int indicating the index of the current int. This
attribute should be initialized to 0, the location of where the next integer
will be added.
And the following methods:
VariableArray()
- Default constructor that creates myInts
with INITIAL_ARRAY_SIZE entries, all initialized to zero.
VariableArray(int initialArraySize)
- Constructor that creates
myInts with the specified initalArraySize entries, all
initialized to zero.
VariableArray(int[] integerArray)
- Constructor that creates
myInts with the enough space to hold the given integerArray array.
all entries are initialized from the given integerArray array. Make sure
to also initialize currentInt appropriately.
addInt(int integer)
- Add integer to myInts and update
currentInt. If there is no room in myInts,
the array will have to be resized by adding ARRAY_EXPAND entries.
addInts(int[] integerArray)
- Add the given intergerArray to
myInts and update currentInt. If there is not
enough room in myInts, the array will have to be resized by adding the
appropriate multiple of ARRAY_EXPAND entries.
deleteInt(int index)
- Delete the integer at the given index.
Make sure to compress myInts and update
currentInt. You must also verify that the given index exists in
myInts.
deleteInts(int index, int count)
- Delete the integers count
starting at the given index. Make sure to compress myInts and
update currentInt. You must also verify that the
given index exists in myInts and that there are count
entries starting from there.
equals(VariableArray otherArray)
- Compare two VariableArrays
objects for equality. They will be considered equal, if and only if both
have the same number of integers and all their entries are equal.
getIntAt(int index)
- This method returns the integer located
at the given index. This method must verify that the given index
is before currentInt and within the bounds of the size of myInts.
In case of an error, this method should return -99999.
showAll()
- This method prints out myInts
and currentInt.
Implement this class in Java and write another class to test it. Make sure you test all the possibilities.
Name these programs VariableArray & VariableArrayDemo
Place both classes in the edu.cuny.lehman.cmp326 package.
Please submit the completed assignment on Blackboard by attaching all your .java files. Make sure to attach all your programs to each submission.