I need to create a bingo card...

Question

Hi I am totally clueless and started my class well behind everybody else. I am not asking for solution to my assignment is the assignment is to create the whole game, all I am asking is how to start. I am supposed to start by creating a Bingo Card. We were given some codes already, like Arraybag, BagADT etc. using General <T>. Could somone please help me get started?
I am trying to create a bingocard class. I am supposed to use the Arraybag.
// ArrayBag.java Author: Lewis/Chase
// Represents an array implementation of a bag.
import java.util.*;
public class ArrayBag<T> implements BagADT<T>
private static Random rand = new Random();
private final int DEFAULT_CAPACITY = 100;
private final int NOT_FOUND = -1;
private int count; // the current number of elements in the bag
private T[] contents;
// Creates an empty bag using the default capacity.
public ArrayBag()
count = 0;
contents = (T[])(new Object[DEFAULT_CAPACITY]);
// Creates an empty bag using the specified capacity.
public ArrayBag (int initialCapacity)
count = 0;
contents = (T[])(new Object[initialCapacity]);
// Adds the specified element to the bag.
// Expands the capacity of the bag array if necessary.
public void add (T element)
if (size() == contents.length)
expandCapacity();
contents[count] = element;
count++;
// Adds the contents of the parameter to this bag.
public void addAll (BagADT<T> bag)
Iterator<T> scan = bag.iterator();
while (scan.hasNext())
add (scan.next());
// Removes a random element from the set and returns it. Throws
// an EmptySetException if the set is empty.
public T removeRandom() throws EmptyBagException
if (isEmpty())
throw new EmptyBagException();
int choice = rand.nextInt(count);
T result = contents[choice];
contents[choice] = contents[count-1]; // fill the gap
contents[count-1] = null;
count--;
return result;
// Removes one occurrence of the specified element from the bag
// and returns it.Throws an EmptyBagException if the bag is empty
// and a NoSuchElementException if the target is not in the bag.
public T remove (T target) throws EmptyBagException,
NoSuchElementException
int search = NOT_FOUND;
if (isEmpty())
throw new EmptyBagException();
for (int index=0; index < count && search == NOT_FOUND; index++)
if (contents[index].equals(target))
search = index;
if (search == NOT_FOUND)
throw new NoSuchElementException();
T result = contents[search];
contents[search] = contents[count-1];
contents[count-1] = null;
count--;
return result;
// Returns a new bag that is the union of this bag and the
// parameter.
public BagADT<T> union (BagADT<T> bag)
ArrayBag<T> both = new ArrayBag<T>();
for (int index = 0; index < count; index++)
both.add (contents[index]);
Iterator<T> scan = bag.iterator();
while (scan.hasNext())
both.add (scan.next());
return both;
// Returns true if this bag contains the specified target
// element.
public boolean contains (T target)
int search = NOT_FOUND;
for (int index=0; index < count && search == NOT_FOUND; index++)
if (contents[index].equals(target))
search = index;
return (search != NOT_FOUND);
// Returns true if this bag contains exactly the same elements
// as the parameter.
public boolean equals (BagADT<T> bag)
boolean result = false;
ArrayBag<T> temp1 = new ArrayBag<T>();
ArrayBag<T> temp2 = new ArrayBag<T>();
T obj;
if (size() == bag.size())
temp1.addAll(this);
temp2.addAll(bag);
Iterator<T> scan = bag.iterator();
while (scan.hasNext())
obj = scan.next();
if (temp1.contains(obj))
temp1.remove(obj);
temp2.remove(obj);
result = (temp1.isEmpty() && temp2.isEmpty());
return result;
// Returns true if this bag is empty and false otherwise.
public boolean isEmpty()
return (count == 0);
// Returns the number of elements currently in this bag.
public int size()
return count;
// Returns an iterator for the elements currently in this bag.
public Iterator<T> iterator()
return new ArrayIterator<T> (contents, count);
// Returns a string representation of this bag.
public String toString()
String result = "";
for (int index=0; index < count; index++)
result = result + contents[index].toString() + "\n";
return result;
// Creates a new array to store the contents of the bag with
// twice the capacity of the old one.
private void expandCapacity()
T[] larger = (T[])(new Object[contents.length*2]);
for (int index=0; index < contents.length; index++)
larger[index] = contents[index];
contents = larger;
======================================================
I started my class like this:
* BingoCard.java
* Created on January 28, 2006, 9:08 PM
* To change this template, choose Tools | Options and locate the template under
* the Source Creation and Management node. Right-click the template and choose
* Open. You can then make changes to the template in the Source Editor.
public class BingoCard {
/** Creates a new instance of BingoCard */
public BingoCard() {
public static void main (String[] args)
ArrayBag<BingoCard> bingoBag = new ArrayBag<BingoCard>();
BingoCard Card;
What can I do or am I doing wrong? Please help me learn.

Answer 1

Hey thanks for all the help. I got figured out so thanks again. :D