Class MealCard

java.lang.Object
  MealCard

public class MealCard
extends java.lang.Object

A meal card is assigned to an individual student. When a meal card is initially issued, the balance is set to the number of points purchased. If the student does not specify the number of points, then the initial balance is set to 100 points. A student can purchase additional points at any time during the quarter. Points cost 25 cents each. Each time food items are bought, points are deducted from the balance. If the balance becomes negative, the purchase of food items is not allowed.

Field Summary

private int	balance
private static double	DOLLARS_PER_POINT
private static int	INIT_BALANCE
private Student	student

Constructor Summary

MealCard()
Default constructor for objects of class MealCard

MealCard(Student std, int bal)
Constructor for objects of class MealCard.

Method Summary

boolean	buyFood(double cost) User wishes to purchase cost worth of food.
void	buyPoints(double amt) User wishes to purchase amt worth of points.
int	getBalance() Accessor method to get the students current balance.
private int	points(double x) Convert dollar amount into points.
void	setStudent(java.lang.String fname, java.lang.String lname, int sid) Sets the student instance variable.
java.lang.String	toString() For printing MealCard objects.

Methods inherited from class java.lang.Object

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

Field Detail

INIT_BALANCE

private static final int INIT_BALANCE

See Also:

Constant Field Values

DOLLARS_PER_POINT

private static final double DOLLARS_PER_POINT

See Also:

Constant Field Values

student

private Student student

balance

private int balance

Constructor Detail

MealCard

public MealCard()

Default constructor for objects of class MealCard

MealCard

public MealCard(Student std,
                int bal)

Constructor for objects of class MealCard. Initializes student and balance.

Method Detail

setStudent

public void setStudent(java.lang.String fname,
                       java.lang.String lname,
                       int sid)

Sets the student instance variable.

Parameters:

fname - the first name of the student

lname - the last name of the student

sid - the students 5 digit ID number

getBalance

public int getBalance()

Accessor method to get the students current balance.

Parameters:

-

Returns:

balance

points

private int points(double x)

Convert dollar amount into points.

Parameters:

x - a dollar amount

Returns:

the equivalent of x in points (round to nearest point)

buyPoints

public void buyPoints(double amt)

User wishes to purchase amt worth of points. Update his or her balance accordingly.

Parameters:

amt - a dollar amount

buyFood

public boolean buyFood(double cost)

User wishes to purchase cost worth of food. If the balance is sufficient to cover the cost of the food, update his or her balance accordingly and return true. If not, return false.

Parameters:

cost - a dollar amount

Returns:

true or false

toString

public java.lang.String toString()

For printing MealCard objects.

Overrides:

toString in class java.lang.Object

Parameters:

-

Returns:

a String representing the MealCard object