Load an image into a JPanel in an applet

Question

base on this thread :Java: Load image from file, edit and add to JPanel i tried to load na image into a JPanel but its not painting it,so here s the deal, as suggested i have created a new class file named JImageComponent which extends from a JComponent, which looks like this :

package in.co.sneh;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import javax.swing.JComponent;
private BufferedImage img;
    public class JImageComponent  extends JComponent
{
    public JImageComponent (BufferedImage bi)
{
    img = bi;
}

@Override
public void paintComponent(Graphics g)
{
    g.drawImage(img, 0, 0, this);
}
}

then in the applet form class ,when i click on the loadPicture Button, the action performed looks like this :

JFileChooser chooser = new JFileChooser();
    chooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
   int retVal = chooser.showDialog(AppletForm.this, "Attach");
    if (retVal == JFileChooser.APPROVE_OPTION) {
        picFile = chooser.getSelectedFile();
        try {

            image = ImageIO.read(picFile);
            JImageComponent jcomp = new JImageComponent(image);
            Graphics2D g = image.createGraphics();
            jcomp.paintComponents(g);
            // Draw here on the graphics
            //g.dispose();
            g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, 
            RenderingHints.VALUE_ANTIALIAS_ON);
            jPanel6.add(jcomp);
            System.out.println("Testing" + picFile);



        } catch (IOException e) {

            e.printStackTrace();
        }

to me everything is in place however the image is not showing when in the file explorer choose the image, can anyone help me out? Thanks in advance, Romulo Romero

Answer 1

After adding a new component to the container, you need to call

jPanel6.revalidate();
jPanel6.repaint();

Also applets cannot load resources from the local file system unless they are signed.

Note: While having a a single JImageComponent would be better, JLabel components already offer the functionality of switching images by using setIcon.