Question about arrays. Please help.

[BenH]

Hi there.

I need help. I am trying to program an inventory program. I am trying to use Jlabel to print my array one line at a time. When I try to print the array it displays the memory address and I don't want that. I want it to print the array one line at a time. My code is below. How do I accomplish this? Can someone please show me how to do this? Thanks!

import javax.swing.JFrame;

public class GUIRun {

    public static void main(String[] args)
    {
        InventoryAdvanced inventory = new InventoryAdvanced();
        inventory.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        inventory.setSize(300,300);
        inventory.setVisible(true);

       	//Define the calculation variables
		double c1;
		double c2;
		double c3;

		//Declare the calculation variables
		c1 = 13.00;
		c2 = 5.00;
		c3 = 10.00;

		//Declare the 5% restocking fee
		double fee = .05;
		double cost;
		cost = 130.00;

		//Create the objects
		InventoryDefine swordstone = new InventoryDefine("Sword In The Stone Movie", 1, 10, 13.00, 130.00);
		InventoryDefine hercules = new InventoryDefine("Hercules Movie", 2, 20, 5.00, 100.00);
		InventoryDefine mermaid = new InventoryDefine("The Little Mermaid Movie", 3, 30, 10.00, 300.00);
        InventorySort sortThis = new InventorySort();
		InventoryCal cal = new InventoryCal();
		SwordStone movie = new SwordStone();

		//Use an object to store the array
   		InventoryDefine[] inventoryArray = new InventoryDefine[3];

		//Declare the arrays
   		inventoryArray[0] = swordstone;
   		inventoryArray[1] = hercules;
   		inventoryArray[2] = mermaid;

   		inventory.showArray(Integer.toString(inventoryArray));

   		/*//Call the method from the sortThis object
		sortThis.Sort(inventoryArray);

		//Call the method from InventoryCal
		cal.calVar(c1, c2, c3);

		//Override the method from InventoryInherit
		movie.calVar(cost, fee); */


    }
}

/*
Author: Ben Hartnett
Sources: Java: A Beginner's Guide
Source 2: Monster example posted on student forums
Date Retrieved: 1-26-2012
*/

import java.awt.FlowLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingConstants;

public class InventoryAdvanced extends JFrame {

		//Create the GUI
		private JLabel label1;

		//Add JLabels to JFrame

		public InventoryAdvanced()
		{
			super( "JLabel" );
			setLayout( new FlowLayout() );
		}

		public void showArray(InventoryDefine[] array)
		{
			label1 = new JLabel(array);
			add( label1 );
		}
}

This is not my entire program. It is the part I need help with.

[Norm]

I want it to print the array one line at a time

Use a loop, get the elements from the array one at a time inside of the loop using the loop's control variable as the index and print them.

Where in your code are you trying to print the array? I don't see any print statements.

[BenH]

Use a loop, get the elements from the array one at a time inside of the loop using the loop's control variable as the index and print them.

Where in your code are you trying to print the array? I don't see any print statements.

Can you show me an example of the loop? Reason I ask is because I am a visual learner. I am using JLabel to for the arrays. I am trying to use JLabel to display the array, but it keeps displaying the array memory address. Can you tell me how to fix that? Thanks! Much appreciated!

[fatabass]

In your InventoryDefine class, define a toString method, and return whatever you will want to be printed.

For example:

IventoryDefine swordstone = new InventoryDefine("Sword In The Stone Movie", 1, 10, 13.00, 130.00);

If "Sword In The Stone Movie" is the name of your InventoryDefine object and you want to print this when you say System.out.println(swordstone), you will something like this in your InventoryDefine class:

public String toString()
{
return name;
}

Now I see that you have an array called: *inventoryArray which holds InventoryDefine objects.

In your main method try this please:

for(InventoryDefine inventory: inventoryArray)
{
System.out.println(inventory);
}

The JLabel part, you can figure out yourself I guess..

[Norm]

I am trying to use JLabel to display the array

What are you expecting to see in the JLabel? Will the size of the array always be small enough to contain all of the array's contents?
You could show the element at location ix by indexing the array:
theArray[ix]
will reference the element at location ix.
Change the value of ix to see different elements in the array

[BenH]

I am expecting to see the inventory name, product, etc...I am expecting to see this information in the parameters:

       InventoryDefine swordstone = new InventoryDefine("Sword In The Stone Movie", 1, 10, 13.00, 130.00);

How do I index? What does that mean?

[Norm]

How do I index? What does that mean?

You need to study how to use arrays. Read this:
Arrays (The Java™ Tutorials > Learning the Java Language > Language Basics)