Help with my logo

[felix ortega]

hopefully someone can help me. My program compiles fine but I get the error:
Uncaught error fetching image:java.lang.NullPointerException at sun.awt.image.URLImageSource.getConnection(URLImageSource.java:99) at sun.awt.image.URLImageSource.getDecoder(URLImageSource.java:113) at sun.awt.image.InputStreamImageSource.doFetch(InputStreamImageSource.java:240) at sun.awt.image.ImageFetcher.fetchloop(ImageFetcher.java:172) at sun.awt.image.ImageFetcher.run(ImageFetcher.java:136)

i know the problem seems to lie within the attempt to create the company logo and there is an issue with it not knowing where to look for my logo. all of my attempts to fix it have been unsuccessful. i have to to turn this in today within the next 8 hrs and would appreciate any and all help. this is my last resort i dont know what to do or how to fix it.please keep in mind i am totally new to java programming.please please please please help me.

here are the assignment details:
•Modify the Inventory Program by adding a button to the GUI that allows the user to move to the first item, the previous item, the next item, and the last item in the inventory. If the first item is displayed and the user clicks on the Previous button, the last item should display. If the last item is displayed and the user clicks on the Next button, the first item should display.
•Add a company logo to the GUI using Java graphics classes.

 // Inventory program part 5 Inventory5i.java
//
// Uses a GUI to display the information one product at a time
// GUI also displays the value of the entire inventory, the dvd name, genre, and the restocking fee
// Uses buttons to allow the user to move to the first item in the inventory, the previous item, 
// the next item, and the last item in the inventory.
// Allows the user to move to the last item when the first item is displayed and the previous button is selected,
// and to move to the first item when the last item is displayed and the next button is selected.
// The GUI includes a company logo.


import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.FlowLayout;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.Dimension;
import java.net.URL;



class Inventory {

    String number; // stores product number
    String name; // stores product name
    int quantity; // stores quanity in stock
    double price; // stores product price

    public Inventory(String Num, String N,  int Q, double P)
    {
        number = Num;
        name = N;
        quantity = Q;
        price = P;
    }

    public void setName(String N) // Method to set and get the product name
    {
        name = N;
    }
    public String getName()
    {
        return name;
    }


    public void setNumber(String Num) // Method to set and get the product number
    {
        number = Num;
    }
    public String getNumber()
    {
        return number;
    }



    public void setQuantity(int Q) // Method to set and get the quantity in stock
    {
        quantity = Q;
    }
    public int getQuantity()
    {
        return quantity;
    }



    public void setPrice(double P) // Method to set and get the price
    {
        price = P;
    }
    public double getPrice()
    {
        return price;
    }


    public double getInventoryValue() // Method to calculate the value of the in stock inventory
    {
        return price * quantity;
    }


    public String toString()
    {
        return "DVD Name: "+name + "\nDVD Number: "+number+"\nDVD Price: $"+price+"\nQuantity in Stock: "+quantity + "\nInventory Value: $"+getInventoryValue();
    }
} // end Inventory Class



class Product extends Inventory {

    String genre;    // Subclass to add dvds genre
    double restockFee;    // Restock fee to add to inventory value

    // initialize dvd constructor
    public Product(String genre, double restockFee, String Num, String N,  int Q,  double P)
    {
        super(Num, N, Q, P);
        this.genre = genre;
        this.restockFee = restockFee;
    }

    public Product(String genre, String Num, String N,  int Q, double P)
    {
        super(Num, N, Q, P);
        this.genre = genre;
        // the default restocking fee is 5%
        this.restockFee = 0.05;
    }

    public void setGenre(String genre)
    {
        genre = genre;
    }
    public String getGenre()
    {
        return genre;
    }


    public double getRestockFee() // Figures restocking fee of inventory
    {
        return super.getInventoryValue() * restockFee;
    }

    public double getInventoryValue() // Figures total inventory value including restocking fee
    {
        return  super.getInventoryValue() + (super.getInventoryValue() * restockFee);
    }

    public String toString()
    {
        StringBuffer sb = new StringBuffer("\nGenre: ").append(genre).append("\n");
        sb.append(super.toString());

        return sb.toString();
    }

} // End Product Class


class Inventory2
{

    // place to store all the dvds in the inventory
    Product[] inventory;

    // store the number of dvds that have been added to the inventory
    int number_of_dvds_in_inventory = 0;

    // create an inventory capable of holding maximum_number_of_dvds
    public Inventory2(int maximum_number_of_dvds)
    {
        inventory = new Product[maximum_number_of_dvds];
    }

    // add the office dvds to the end of the inventory
    public void addProduct(Product dvds_to_add_to_inventory)
    {
        inventory[number_of_dvds_in_inventory] = dvds_to_add_to_inventory;
        number_of_dvds_in_inventory++;
    }
    // return the dvds at the location index in the inventory
    public Product getProduct(int index)
    {
        return inventory[index];
    }

    // return the number of dvds in the inventory
    public int getSize()
    {
        return number_of_dvds_in_inventory;
    }

    // run through all the dvds in the inventory, and add up their value.
    // this includes the restocking fee
    public double getTotalValueOfAllInventory()
    {
        double tot = 0.00;

        for(int i = 0; i < number_of_dvds_in_inventory; i++)
        {
            tot += inventory[i].getInventoryValue();
        }
        return tot;
    }

    // sort the dvds in the inventory by name
    public void sortInventory2()
    {
        // Sorting Inventory Information
        for(int j = 0; j < number_of_dvds_in_inventory - 1; j++)
        {
            for(int k = 0; k < number_of_dvds_in_inventory - 1; k++)
            {
                if(inventory[k].getName().compareToIgnoreCase(inventory[k+1].getName()) > 0)
                {
                    Product temp = inventory[k];
                    inventory[k] = inventory[k+1];
                    inventory[k+1] = temp;
                }
            }
        }
    }
} // End Inventory2 class

public class Inventory5i extends JFrame
{

    //create inventory for the dvds
    Inventory2 ProductInventory2;

    // index in the dvd inventory of the currently displayed dvd. 
    // starts at 0, goes to the number of dvds in the inventory - 1
    int index = 0;


    // GUI elements to display currently selected dvd's information
    private final JLabel nameLabel = new JLabel(" DVD Name: ");
    private JTextField nameText;

    private final JLabel numberLabel = new JLabel(" DVD Number: ");
    private JTextField numberText;

    private final JLabel genreLabel = new JLabel(" Genre: ");
    private JTextField genreText;

    private final JLabel priceLabel = new JLabel(" Price: ");
    private JTextField priceText;

    private final JLabel quantityLabel = new JLabel(" Quantity: ");
    private JTextField quantityText;

    private final JLabel valueLabel = new JLabel(" Value: ");
    private JTextField valueText;

    private final JLabel restockFeeLabel = new JLabel(" Restocking Fee: ");
    private JTextField restockFeeText;

    private final JLabel totalValueLabel = new JLabel(" Inventory Total: ");
    private JLabel totalValueText;


    // go to the next dvd in the list
    private Action nextAction  = new AbstractAction("Next") {
        public void actionPerformed(ActionEvent evt) {

        // check to see if there is a next dvd
        if (index == ProductInventory2.getSize() - 1) {
            // if we're at the last dvd in the list, then we can't go any further
            // so go to the front of the list
            index = 0;
        } else {
            index++;
        }

        repaint();
        }
    };
    private JButton nextButton = new JButton(nextAction);

    // go to the previous dvd in the list
    private Action previousAction  = new AbstractAction("Previous") {
        public void actionPerformed(ActionEvent evt) {

        // if we're at the first dvd, then go to the last dvd in the list
        if (index == 0) {
            index = ProductInventory2.getSize() - 1;
        } else {
            index--;
        }

        repaint();
        }
    };
    private JButton previousButton = new JButton(previousAction);

    // go to the first dvd in the list
    private Action firstAction  = new AbstractAction("First") {
        public void actionPerformed(ActionEvent evt) {

        index = 0;

        repaint();
        }
    };
    private JButton firstButton = new JButton(firstAction);

    // go to the last dvd in the list
    private Action lastAction  = new AbstractAction("Last") {
        public void actionPerformed(ActionEvent evt) {

        index = ProductInventory2.getSize() - 1;

        repaint();
        }
    };
    private JButton lastButton = new JButton(lastAction);


    public void addProductToInventory2(Product temp)
    {
        ProductInventory2.addProduct(temp);
        repaint();
    }
    public void sortProductInventory2()
    {
        ProductInventory2.sortInventory2();
        repaint();
    }

    public Inventory5i(int maximum_number_of_dvds)
    {
        // create the inventory object that will hold the dvd information
        ProductInventory2 = new Inventory2(maximum_number_of_dvds);

        // setup the GUI
        // add the next dvd button to the top of the GUI
        // setup a panel to collect all the buttons in a FlowLayout
        JPanel buttonPanel = new JPanel();
        buttonPanel.add(firstButton);
        buttonPanel.add(previousButton);
        buttonPanel.add(nextButton);
        buttonPanel.add(lastButton);
        getContentPane().add(buttonPanel, BorderLayout.NORTH);


        // setup the logo for the GUI
        URL url = this.getClass().getResource("logo.jpg");
           Image img = Toolkit.getDefaultToolkit().getImage(url);
        // scale the image so that it will fit in the GUI
        Image scaledImage = img.getScaledInstance(205, 300, Image.SCALE_AREA_AVERAGING);
        // create a JLabel with the image as the label's Icon
        Icon logoIcon = new ImageIcon(scaledImage);
        JLabel companyLogoLabel = new JLabel(logoIcon);

        // add the logo to the GUI
        getContentPane().add(companyLogoLabel, BorderLayout.WEST);

        // dvd information
        // setup a panel to collect all the components.
        JPanel centerPanel = new JPanel(new GridLayout(8, 2, 0, 4));

        centerPanel.add(nameLabel);
        nameText = new JTextField("");
        nameText.setEditable(false);
        centerPanel.add(nameText);

        centerPanel.add(numberLabel);
        numberText = new JTextField("");
        numberText.setEditable(false);
        centerPanel.add(numberText);

        centerPanel.add(genreLabel);
        genreText = new JTextField("");
        genreText.setEditable(false);
        centerPanel.add(genreText);

        centerPanel.add(priceLabel);
        priceText = new JTextField("");
        priceText.setEditable(false);
        centerPanel.add(priceText);

        centerPanel.add(quantityLabel);
        quantityText = new JTextField("");
        quantityText.setEditable(false);
        centerPanel.add(quantityText);

        centerPanel.add(valueLabel);
        valueText = new JTextField("");
        valueText.setEditable(false);
        centerPanel.add(valueText);

        centerPanel.add(restockFeeLabel);
        restockFeeText = new JTextField("");
        restockFeeText.setEditable(false);
        centerPanel.add(restockFeeText);

        // add the overall inventory information to the panel
        centerPanel.add(totalValueLabel);
        totalValueText = new JLabel("");
        centerPanel.add(totalValueText);

        // add the panel to the center of the GUI's window
        getContentPane().add(centerPanel, BorderLayout.CENTER);

        repaint();
    }


    // repaint the GUI with new Product information
    public void repaint() {

        Product temp = ProductInventory2.getProduct(index);

        if (temp != null) {
            nameText.setText( temp.getName() );
            numberText.setText( ""+temp.getNumber() );
            genreText.setText( temp.getGenre() );
            priceText.setText( String.format("$%.2f", temp.getPrice()) );
            quantityText.setText( ""+temp.getQuantity() );
            valueText.setText( String.format("$%.2f", temp.getPrice() * temp.getQuantity() ) );
            restockFeeText.setText( String.format("$%.2f", temp.getRestockFee() ) );
        }

        totalValueText.setText( String.format("$%.2f", ProductInventory2.getTotalValueOfAllInventory() ) );

    }


    public static void main(String args[])
    {

        // create a new GUI object that will hold a maximum of 6 dvds
        Inventory5i Product_GUI = new Inventory5i (6);

        // Add the office supplies to the inventory
        Product_GUI.addProductToInventory2(new Product("Action" , "1","Matrix" , 96, 19.99));
        Product_GUI.addProductToInventory2(new Product("Comedy" , "2","Superbad" , 123,  22.99));
        Product_GUI.addProductToInventory2(new Product("Horror",  "3","The Grudge", 77,  13.99));
        Product_GUI.addProductToInventory2(new Product("Drama", "4","My Girl" , 112, 14.99));
        Product_GUI.addProductToInventory2(new Product("Family", "5", "Parent Trap", 42, 15.99));
        Product_GUI.addProductToInventory2(new Product("Documentary", "6", "March of the Penguins", 82, 16.99));


        // sort the dvds by name
        Product_GUI.sortProductInventory2();

        // Get the GUI to show up on the screen
        Product_GUI.setDefaultCloseOperation( EXIT_ON_CLOSE );
        Product_GUI.pack();
        Product_GUI.setSize(700, 350);
        Product_GUI.setResizable(false);
        Product_GUI.setLocationRelativeTo( null );
        Product_GUI.setVisible(true);

        return;

    }
}  // End Inventory5 class   

[Christophe Verré]

Check this FAQ.

[Christophe Verré]

URL url = this.getClass().getResource("logo.jpg");  

If the logo is not found, the url will be null. Where did you put it ?

[felix ortega]

In regards to your first reply---gotcha and I wont let it happen again

In regards to your second post---this is where the file is on my computer:
C:\Users\Felix & Karen\Documents\School Folder\IT 215 Materials\logo.jpg

Is that what you meant?

[Christophe Verré]

Are you allowed to use a full path to load your image ? If you are, you can use the following instead :

Image img = Toolkit.getDefaultToolkit().getImage("C:/Users/Felix & Karen/Documents/School Folder/IT 215 Materials/logo.jpg");

this.getClass().getResource("logo.jpg"); is going to look for "logo.jpg" in a place accessible by the Inventory5i's classloader. If you had put "logo.jpg" in the same directory as the Inventory5i.class, it would have been found. There's a tutorial here.

[felix ortega]

Man you are the most awesome person ever!!! I do not know why for the life of me I could not get that to work no matter where I put the logo.


I want to thank you one hundred billion times again and again.

I guess i'm just so tired of this project I couldn't see the problem.

Cheers to you!!!