Arrays - Java Software Solutions: Foundations of Program Design - page 398

Each DVD added to the collection is specified by its title, director, year of release,
purchase price, and whether or not it is in Blu-ray format.
Listing 8.8 shows the DVDCollection class. It contains an array of DVD objects
representing the collection. It maintains a count of the DVDs in the collection and
their combined value. It also keeps track of the current size of the collection array
so that a larger array can be created if too many DVDs are added to the collection.
LISTING 8.8
//********************************************************************
// DVDCollection.java Author: Lewis/Loftus
//
// Represents a collection of DVD movies.
//********************************************************************
import java.text.NumberFormat;
public class DVDCollection
{
private DVD[] collection;
private int count;
private double totalCost;
//-----------------------------------------------------------------
// Constructor: Creates an initially empty collection.
//-----------------------------------------------------------------
public DVDCollection ()
{
collection = new DVD[100];
count = 0;
totalCost = 0.0;
}
//-----------------------------------------------------------------
// Adds a DVD to the collection, increasing the size of the
// collection array if necessary.
//-----------------------------------------------------------------
public void addDVD (String title, String director, int year,
double cost, boolean bluray)
{
if (count == collection.length)
increaseSize();
collection[count] = new DVD (title, director, year, cost, bluray);