Error on ActionListener method

Question

im coding a Movie Theatre Ticket program,in this program depending on which movie you choose to watch,it will change the displaying poster to the poster according to your choice,however when i execute and choose a certain movie,the program gives out an error pointing towards lblPosterLabel.setIcon(new javax.swing.ImageIcon(getClass().getResource("C:\Users\Roberto\workspace\ProjetoFinaldeCurso\moviePosters\madmax.jpg")));, i have no idea how to fix this,here is the code(btw im writing it in the MVC pattern,because my programming teacher wants it this way)

 package view;
public class NewTicketWindow extends JDialog 

/*public static void main(String[] args) {
    try {
        NewTicketWindow dialog = new NewTicketWindow();
        dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
        dialog.setVisible(true);
    } catch (Exception e) {
        e.printStackTrace();
    }
}*/


/**
 * Create the dialog.
 */
public NewTicketWindow(Database database)
{
    setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
    this.database = database;
    this.mc = mc;
    setBounds(100, 100, 609, 571);
    getContentPane().setLayout(null);
    contentPanel.setBounds(0, 0, 593, 533);
    contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
    getContentPane().add(contentPanel);
    contentPanel.setLayout(null);

    JLabel lblEnterYourName = new JLabel("Enter your Name:");
    lblEnterYourName.setBounds(10, 11, 106, 14);
    contentPanel.add(lblEnterYourName);

    JLabel lblEnterYourCpf = new JLabel("Enter your CPF:");
    lblEnterYourCpf.setBounds(10, 39, 106, 14);
    contentPanel.add(lblEnterYourCpf);

    JLabel lblSelectAMovie = new JLabel("Select a Movie");
    lblSelectAMovie.setBounds(10, 64, 106, 14);
    contentPanel.add(lblSelectAMovie);

    textField = new JTextField();
    textField.setBounds(116, 8, 86, 20);
    contentPanel.add(textField);
    textField.setColumns(10);

    textField_1 = new JTextField();
    textField_1.setBounds(116, 36, 86, 20);
    contentPanel.add(textField_1);
    textField_1.setColumns(10);

    this.moviesComboBox = new JComboBox();
    moviesComboBox.addActionListener(new java.awt.event.ActionListener()
    {
        public void actionPerformed(java.awt.event.ActionEvent evt) 
        {
            moviesComboBoxEvent(evt);
        }
    });
    this.moviesComboBox.setBounds(116, 61, 204, 20);
    populateMoviesComboBox();
    contentPanel.add(this.moviesComboBox);


    JLabel lblDateShowtime = new JLabel("Date & Showtime");
    lblDateShowtime.setFont(new Font("Tahoma", Font.PLAIN, 15));
    lblDateShowtime.setForeground(Color.BLUE);
    lblDateShowtime.setBounds(10, 89, 113, 14);
    contentPanel.add(lblDateShowtime);

    JSeparator separator = new JSeparator();
    separator.setBounds(126, 101, 130, 2);
    contentPanel.add(separator);

    JLabel lblShowdate = new JLabel("Showdate :");
    lblShowdate.setBounds(10, 114, 71, 14);
    contentPanel.add(lblShowdate);

    JLabel lblShowtime = new JLabel("Showtime :");
    lblShowtime.setBounds(10, 139, 71, 14);

    contentPanel.add(lblShowtime);

    this.showdateComboBox = new JComboBox();
    showdateComboBox.setFont(new Font("Tahoma", Font.BOLD, 9));
    this.showdateComboBox.setBounds(116, 114, 100, 20);
    populateShowdateComboBox();
    contentPanel.add(this.showdateComboBox);

    this.showtimeComboBox = new JComboBox();
    this.showtimeComboBox.setBounds(116, 139, 100, 20);
    populateShowtimeComboBox();
    contentPanel.add(this.showtimeComboBox);

    JLabel label = new JLabel("");
    label.setBounds(0, 164, 46, 14);
    contentPanel.add(label);

    JLabel lblNumberOfTickets = new JLabel("Number of Tickets");
    lblNumberOfTickets.setForeground(Color.BLUE);
    lblNumberOfTickets.setFont(new Font("Tahoma", Font.PLAIN, 15));
    lblNumberOfTickets.setBounds(10, 169, 123, 20);
    contentPanel.add(lblNumberOfTickets);

    JLabel lblAdults = new JLabel("Adults :");
    lblAdults.setBounds(10, 200, 46, 14);
    contentPanel.add(lblAdults);

    this.adultsComboBox = new JComboBox();
    this.adultsComboBox.setBounds(53, 197, 46, 20);
    populateAdultsComboBox();
    contentPanel.add(this.adultsComboBox);

    JLabel lblKids = new JLabel("Kids :");
    lblKids.setBounds(10, 225, 46, 14);
    contentPanel.add(lblKids);

    this.kidsComboBox = new JComboBox();
    this.kidsComboBox.setBounds(53, 224, 46, 20);
    populateKidsComboBox();
    contentPanel.add(this.kidsComboBox);

    lblPosterLabel = new JLabel("New label");
    lblPosterLabel.setIcon(new ImageIcon("C:\\Users\\Roberto\\workspace\\ProjetoFinaldeCurso\\moviePosters\\equilibrium.jpg"));
    lblPosterLabel.setBounds(391, 11, 192, 283);
    contentPanel.add(lblPosterLabel);

    {
        JPanel buttonPane = new JPanel();
        buttonPane.setBounds(159, 500, 434, 33);
        contentPanel.add(buttonPane);
        buttonPane.setLayout(null);
        {
            JButton okButton = new JButton("OK");
            okButton.addActionListener(new ActionListener() 
            {
                public void actionPerformed(java.awt.event.ActionEvent evt) 
                {

                }
            });
            okButton.setBounds(273, 5, 65, 23);
            okButton.setActionCommand("OK");
            buttonPane.add(okButton);
            getRootPane().setDefaultButton(okButton);
        }
        {
            JButton cancelButton = new JButton("Cancel");
            cancelButton.addActionListener(new ActionListener() 
            {
                public void actionPerformed(ActionEvent e) 
                {
                    dispose();
                }
            });
            cancelButton.setBounds(345, 5, 84, 23);
            cancelButton.setActionCommand("Cancel");
            buttonPane.add(cancelButton);
        }
    }
    setVisible(true);
}

public void populateMoviesComboBox() 
 {

    this.moviesComboBox.removeAllItems();
    this.moviesComboBox.addItem("");
    for (int i = 0; i < database.getMovie().size(); i++) 
    {
        this.moviesComboBox.addItem(database.getMovie().get(i).getMovieTitle());
    }
}

public void populateShowtimeComboBox()
{
    this.showtimeComboBox.removeAllItems();
    this.showtimeComboBox.addItem("");
    for(int i = 0; i < database.getShowtime().size(); i++)
    {
        this.showtimeComboBox.addItem(database.getShowtime().get(i).getShowtime());
    }
}

public void populateShowdateComboBox()
{
    this.showdateComboBox.removeAllItems();
    this.showdateComboBox.addItem("");
    for(int i = 0; i < database.getShowdate().size(); i++)
    {
        this.showdateComboBox.addItem(database.getShowdate().get(i).getShowdate());
    }
}

public void populateAdultsComboBox()
{
    this.adultsComboBox.removeAllItems();
    this.adultsComboBox.addItem("");
    for(int i = 0; i < database.getAdultsKids().size(); i++)
    {
        this.adultsComboBox.addItem(database.getAdultsKids().get(i).getNumberOfAdultsAndKids());
    }
}

public void populateKidsComboBox()
{
    this.kidsComboBox.removeAllItems();
    this.kidsComboBox.addItem("");
    for(int i = 0; i < database.getAdultsKids().size(); i++)
    {
        this.kidsComboBox.addItem(database.getAdultsKids().get(i).getNumberOfAdultsAndKids());
    }
}

private void cancelPressed()
{
    System.exit(DISPOSE_ON_CLOSE);
}

public void moviesComboBoxEvent(java.awt.event.ActionEvent evt) 
{

    if((String)moviesComboBox.getSelectedItem() == "Equilibrium")
    {
        lblPosterLabel.setIcon(new javax.swing.ImageIcon(getClass().getResource("C:\\Users\\Roberto\\workspace\\ProjetoFinaldeCurso\\moviePosters\\equilibrium.jpg")));
    }
    else if((String)moviesComboBox.getSelectedItem() == "Mad Max: Fury Road")
    {
        lblPosterLabel.setIcon(new javax.swing.ImageIcon(getClass().getResource("C:\\Users\\Roberto\\workspace\\ProjetoFinaldeCurso\\moviePosters\\madmax.jpg")));
    }
    else if((String)moviesComboBox.getSelectedItem() == "Rosemary's Baby")
    {
        lblPosterLabel.setIcon(new javax.swing.ImageIcon(getClass().getResource("C:\\Users\\Roberto\\workspace\\ProjetoFinaldeCurso\\moviePosters\\rosemary.jpg")));
    }
    else if((String)moviesComboBox.getSelectedItem() == "Alien")
    {
        lblPosterLabel.setIcon(new javax.swing.ImageIcon(getClass().getResource("C:\\Users\\Roberto\\workspace\\ProjetoFinaldeCurso\\moviePosters\\alien.jpg")));
    }
    else if((String)moviesComboBox.getSelectedItem() == "The Matrix")
    {
        lblPosterLabel.setIcon(new javax.swing.ImageIcon(getClass().getResource("C:\\Users\\Roberto\\workspace\\ProjetoFinaldeCurso\\moviePosters\\matrix.jpg")));
    }
    else if((String)moviesComboBox.getSelectedItem() == "Furious 7")
    {
        lblPosterLabel.setIcon(new javax.swing.ImageIcon(getClass().getResource("C:\\Users\\Roberto\\workspace\\ProjetoFinaldeCurso\\moviePosters\\furious.jpg")));
    }
}

 private void moviesComboBoxItemStateChanged(java.awt.event.ItemEvent e) 
 {   
 }

}