Displaying images in Java

[tommyny04]

I'm kinda new to programming but I usually figure things out by myself but I need help with this. I'm trying to display an image in the Center region of a JFrame and other icons/button in the other regions. So far, I have this:

public class RiskFrame extends JFrame implements ActionListener, MouseListener{
 
    private BufferedImage bImage;
    private Image image;
 
    private JPanel topPanel = new JPanel();
    private JPanel bottomPanel = new JPanel();
    private JPanel centerPanel = new JPanel();
    private JPanel rightPanel = new JPanel();
 
    private JButton saveButton = new JButton("Save", new ImageIcon("save.jpg"));
    private JButton openButton = new JButton("Open", new ImageIcon("OpenIcon.gif"));
    private static JButton newButton = new JButton("New");
    private JButton addTerritory = new JButton("Add New");
    private JButton removeTerritory = new JButton(" Remove");
 
    private JLabel goodStatus = new JLabel();
    private JLabel badStatus = new JLabel();
 
    private JPanel territoryPanel = new JPanel();
    private JLabel territoryInfo = new JLabel("Territory Info");
    private JLabel country = new JLabel("Country: ");
    private JTextField countryField = new JTextField(20);
    private JPanel countryComp = new JPanel();
    private JLabel continent = new JLabel("Continent: ");
    private JTextField continentField = new JTextField(20);
    private JPanel continentComp = new JPanel();
    private JLabel cardType = new JLabel("Card Type: ");
    private JTextField cardField = new JTextField(20);
    private JPanel cardComp = new JPanel();
    private JLabel redColor = new JLabel("R Color #: ");
    private JTextField redColorField = new JTextField(20);
    private JPanel redComp = new JPanel();
    private JLabel greenColor = new JLabel("G Color #: ");
    private JTextField greenColorField = new JTextField(20);
    private JPanel greenComp = new JPanel();
    private JLabel blueColor = new JLabel("B Color #: ");
    private JTextField blueColorField = new JTextField(20);
    private JPanel blueComp = new JPanel();
 
    public RiskFrame(){
        layoutGUI();
        centerPanel.addMouseListener(this);
    }
 
 
 
    public void layoutGUI(){
        topPanel.add(newButton);
        topPanel.add(openButton);
        topPanel.add(saveButton);
        topPanel.add(addTerritory);
        topPanel.add(removeTerritory);
        bottomPanel.add(goodStatus);
 
        rightPanel.setLayout(new BorderLayout());
        rightPanel.add(territoryInfo, BorderLayout.NORTH);
        territoryPanel.setLayout(new BoxLayout(territoryPanel, BoxLayout.Y_AXIS));
        territoryPanel.setAlignmentX(LEFT_ALIGNMENT);
        territoryPanel.add(Box.createRigidArea(new Dimension(5,5)));
 
        countryComp.add(country);
        countryComp.add(countryField);
        continentComp.add(continent);
        continentComp.add(continentField);
        cardComp.add(cardType);
        cardComp.add(cardField);
        redComp.add(redColor);
        redComp.add(redColorField);
        blueComp.add(blueColor);
        blueComp.add(blueColorField);
        greenComp.add(greenColor);
        greenComp.add(greenColorField);
 
        territoryPanel.add(countryComp);
        territoryPanel.add(continentComp);
        territoryPanel.add(cardComp);
        territoryPanel.add(redComp);
        territoryPanel.add(greenComp);
        territoryPanel.add(blueComp);
 
        rightPanel.add(territoryPanel, BorderLayout.CENTER);
        this.add(topPanel, BorderLayout.NORTH);
        this.add(rightPanel, BorderLayout.EAST);
        this.add(centerPanel, BorderLayout.CENTER);
        this.add(bottomPanel, BorderLayout.SOUTH);
 
        newButton.addActionListener(this);
        openButton.addActionListener(this);
        saveButton.addActionListener(this);
        addTerritory.addActionListener(this);
        removeTerritory.addActionListener(this);
    }
 
 
 
    public void actionPerformed(ActionEvent e){
        String command = e.getActionCommand();
        if (command.equals("New")){
            newGame();
        }
        else if (command.equals("Save")){
            save();
        }
        else if (command.equals("Open")){
            open();
        }
    }
 
    public void newGame(){
 
        String inputValue = JOptionPane.showInputDialog("Please enter the name of the map you would like to use. (Map must already be saved in directory)");
 
        Icon icon = new ImageIcon(inputValue + ".png");
        final JLabel imageLabel = new JLabel(icon); 
        centerPanel.add(imageLabel);
        repaint();
 
        try{
            File file = new File(inputValue + ".board");
            boolean success = file.createNewFile();
            if (success){}
            else {
                JOptionPane.showMessageDialog(null, "File already exists. Please try again");
            }
        }
        catch (IOException e){}
    }
 
    public void open(){
 
        String inputValue = JOptionPane.showInputDialog("Please enter the name of the board file you would like to use. (File must already be saved in directory)");
 
        try {
        FileReader fr = new FileReader(inputValue + ".board");
        BufferedReader br = new BufferedReader(fr);
        }
        catch(IOException e){}
 
        JLabel imageLabel = new JLabel();
        ImageIcon icon = new ImageIcon(inputValue + ".png");
        imageLabel.setIcon(icon);
        centerPanel.add(imageLabel);
        repaint();
    }
 
    public void getColor(int x, int y){
        Raster raster = bImage.getRaster();
        Object data = raster.getDataElements(x, y, null);
        ColorModel model = bImage.getColorModel();
        int rgb = model.getRGB(data);
        Color color = new Color(rgb);
        String pixel = color.toString();
        System.out.println(pixel);
 
    }
 
    public void mouseClicked(MouseEvent e) {
        getColor(e.getX(), e.getY());
    }
 
    public void save(){}
 
    public static void main(String[] args){
 
        RiskFrame frame = new RiskFrame();
        frame.setSize(800,800);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
 

It's not anywhere near done but everytime I run my program, instead of the image appearing in the center region, I will have to resize the window to get the image to appear even though I call the repaint method. Also, my getColor method doesn't work. I always get a nullPointerException when I try to click on the map.

Any help would be greatly appreciated. THANK YOU!!

[JosAH]

You shouldn't add these components directly to the JFrame; first grab the frame's
'contentpane' and add all the components to that container. For an explanation
read the API documentation for the JFrame class.

kind regards,

Jos