Help with Inventory Program, Please

[NewKidjava]

I am new to java and I am having some trouble trying to add an array in my program. I need to use an array to store items. I have been told by others that may program has an array in it already, but I don't think I have done it properly. Can someone please help? Thank you so much.

Here's what I have so far:

public class Inventory2
{
public static void main ( String args[] )
{
cd CD;

cd = new CD(1, "The Block", 3, 12.99);
System.out.println(cd);

cd = new CD(2, "Step by Step", 5, 9.99);
System.out.println(cd);

cd = new CD(3, "Face the Music", 4, 7.99);
System.out.println(cd);

cd = new CD(4, "Summertime", 2, 2.99);

} // end main
} // end class

class CD
{
private String cdName;
private int cdCount;
private double cdPrice;
private int cdItem;
}

public class CD (int itemNumber, String productName, int unitCount, double unitPrice )
{
cdName = name;
cdCount = count;
cdPrice = price;
cdItem = item;
} // end constructor


public void Inventory2( String productName )
{
p_ProductName = productName; // initializes p_ProductName
} // end constructor


// constructor initializes p_ProductName, p_UnitCount;
// double instance variables are initialized to 0 by default

public void Inventory2( String productName, int unitCount, double unitPrice )
{
ProductName = productName; // initializes ProductName
UnitCount = unitCount; // initialized UnitCount
UnitPrice = unitPrice; // initialized UnitPrice
} // end constructor


// begin method
// method to retrieve the ProductName
public String getProductName()
{
return ProductName;
} // end method getProductName


// method to retrieve the UnitCount
public double getUnitCount()
{
return UnitCount;
} // end method getUnitCount

// method to retrieve the UnitPrice
public double getUnitPrice()
{
return UnitPrice;
} // end method getUnitPrice


// method to retrieve product's value.
public double getUnitValue()
{
return UnitCount*UnitPrice;
} // end method getUnitValue

public String toString()
{
return String.format( "name=%s count=%d price=%.2f item=%d value=$%.2f",
name, count, price, item,value ());
}
} // end class CD

class Inventory2
{
CD audio = new CD[200];
public void addToInventory2(CD audio)
{

} //end class

public double getProductValue()
{
Inventory2 myInventory = new Inventory();
myInventory.addToInventory2(new CD (1, "Hangin' Tough", 2, 4.99));

System.out.println( "The total value of inventory is:" + myInventory.getInventoryValue());
return myinventory.getInventoryValue();
} // end method

} //end class Inventory2

[Fubarable]

Please have a look here: Arrays (The Java™ Tutorials > Learning the Java Language > Language Basics)

[NewKidjava]

Thanks for the link but i've tried that site before. I guess my main question would be is where to place the array? Would I be correct to place it at the beginning of the program?

thank again

[Mr.Beans]

Here is a basic bare bones inventory class.

public class Inventory
{
	private ArrayList<CD> cdList = new ArrayList<CD>();
	// or you could also use CD[]


	public int getAmountOfCD() {
		return cdList.size();
	}
	
	public void addCD(CD item) {
		cdList.add(item);
	}

	public void removeItem(CD item) {
		cdList.remove(item);
	}

}

However, maybe you need to freshen up on the very basics of creating variables and classes since you seem to get that very wrong in your post.

You should check out the Java Trail

[dlorde]

I guess my main question would be is where to place the array? Would I be correct to place it at the beginning of the program?

It depends what you are going to do with it. If it is a way for one of your classes to store data, then make it a member variable of that class.