USER-DEFINED CLASSES AND ADTS - Java Programming: From Problem Analysis to Program Design - page 525

The default constructor assigns the default values to the instance variables:

public Dispenser()
{

numberOfItems = 50;
cost = 50;

}

The definition of the class Dispenser is:

//class Dispenser

public class Dispenser
{

private int numberOfItems; //variable to store the number of

//items in the dispenser

private int cost; //variable to store the cost of an item

//Default constructor to set the cost and number of
//items to the default values
//Postcondition: numberOfItems = 50; cost = 50;
public Dispenser()
{

numberOfItems = 50;
cost = 50;

8

}

//Constructor with parameters to set the cost and number
//of items in the dispenser specified by the user
//Postcondition: numberOfItems = setNoOfItems;
// cost = setCost;
public Dispenser( int setNoOfItems, int setCost)
{

if (setNoOfItems >= 0)
numberOfItems = setNoOfItems;

else

numberOfItems = 50;

if (setCost >= 0)
cost = setCost;

else

cost = 50;

}

//Method to show the number of items in the dispenser
//Postcondition: The value of the instance variable
// numberOfItems is returned.

public int getCount()
{

return numberOfItems;

}