Question

I am using a Imagebox JFrame to add image, I want to change image in runtime so I add following code but nothing is displayed.

 javax.swing.JFileChooser filechooser = new javax.swing.JFileChooser();
        filechooser.showDialog(this,"ok");
        File f =  filechooser.getSelectedFile();
        txt_Image.setText(f.getName());        
        FileName = f.getPath()+f.getName();
        Image im= Toolkit.getDefaultToolkit().createImage(FileName);
        ImageIcon receivedIcon =null;
        receivedIcon.setImage(im);
        imagebox1.setimageFile(receivedIcon);

the image box code is below

public class imagebox extends JPanel {
    public void setimageFile(Icon icon) {
       imageFile=icon;
    }
    @Override
    public void paint(Graphics g) {
        super.paint(g);
        if (imageFile != null) {            
            Image imageF=  ((ImageIcon)imageFile).getImage();
           g.drawImage(imageF, 0, 0, getWidth(), getHeight(), this);
        } else {
            g.drawLine(0, 0, getWidth(), getHeight());
            g.drawLine(0, getHeight(), getWidth(), 0);
        }
    }
    private Icon imageFile = null;

so why no error showing but I cant get any image in my imagebox

Answer 1

ImageIcon receivedIcon = null;
receivedIcon.setImage(im);

changed to

ImageIcon receivedIcon = new ImageIcon();
receivedIcon.setImage(im);