JLabel icons update

Hello

I can't update the images defined as icons in a JLabel. I checked the JLabel to change when updateImage() is called - what it does, but the display does not update - the image is just the same as the original that has been loaded image.

Any help would be appreciated... Thank you.

---- some methods and variables omitted ----

public class GraphicInterface extends Reference
{
    private JFrame frame;
    private Container contentPane;
    private JTextPane imageDisplay;
    private JLabel imageLabel;

    public GraphicInterface()
    {
        makeFrame();
    }

    private JLabel loadImage(String fileName)
    {
        JLabel label = new JLabel();
        ImageManager image = new ImageManager(fileName);
        label = image.loadImage();
        return label;
    }
    
    private void updateImage(String fileName)
    {
        imageLabel = loadImage(fileName);
    }

    private void makeFrame()
    {
        frame = new JFrame("GlossarySearch");
        makeMenuBar();
        
        contentPane = frame.getContentPane();
        contentPane.setLayout(new BorderLayout());
        
        makeSearchBar();
        makeDisplay();
        
        frame.pack();
        frame.setSize(600,400);
        frame.setVisible(true);
        
    }

    private void makeDisplay()
    {
        JPanel display = new JPanel();
        display.setLayout(new GridLayout(1,1,5,5));
        contentPane.add(display, BorderLayout.CENTER);
        
        imageLabel = loadImage("default image");
        imageLabel.setBorder(BorderFactory.createTitledBorder("Image"));
        imageLabel.setPreferredSize(new Dimension (200,250));
        display.add(imageLabel);
    }
}

When you say "the JLabel changes" I'm guessing that you mean that the JLabel variable named "imageLabel" was the thing that has changed? That won't change the UI for the original JLabel object reference.

Which is what we need to change. You have a reference to this object in the form of the variable "imageLabel"; to modify the object you call one of its methods, like maybe setIcon() or something... What did your ImageManager class to create the label in the first place.

Tags: Java

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