It is too slow to load an image on JPanel

Question

i overwrite the JPanel's method paintComponent(Graphics g) to load a gif image(1024*786) from local harddisk,but it will cost at least 5 secs to display the image.is there any other way to do this ?
my code:
import javax.swing.*;
import java.awt.*;
public class ImgPane extends JPanel {
private String strImageName ="";
public ImgPane(String imagename) {
strImageName = imagename;
public ImgPane() {
strImageName ="xyz.gif";
public void paintComponent(Graphics g) {
super.paintComponent(g);
Image image = Toolkit.getDefaultToolkit().getImage(imagepanel.ImgPane.class.getResource(strImageName));
g.drawImage(smallImage,0,0,this.getWidth(),this.getHeight(),this);

Answer 1

Hi,
I use a class like this to display an image centered in a JLabel
public class PictureLabel extends JLabel {
boolean hasImage = false;
int  pic_w  = 0;
int  pic_h   = 0;
Image img;
public PictureLabel(String filename) {
super(filename,JLabel.CENTER);
img = Toolkit.getDefaultToolkit().getImage(filename);
MediaTracker mt = new MediaTracker(this);
mt.addImage(img,0);
hasImage = true;
try { mt.waitForID(0); }
catch (InterruptedException ie)     { hasImage = false;     }
if (hasImage)
pic_h = img.getHeight(this);
pic_w = img.getWidth(this);
}   // end of constructor
public Dimension getPreferredSize() {
if (hasImage) return new Dimension(pic_w,pic_h);
else return super.getPreferredSize();
}  // end of getPreferredSize
public void paint(Graphics g) {
if (hasImage)
Dimension d = getSize();
int xo = (d.width-pic_w)/2;
int yo = (d.height-pic_h)/2;
g.drawImage(img,xo,yo,this);
} else super.paint(g);
} // end of paint
} // end of classTry it, it works fine for me - if the actual dimensions of the PictureLabel will get smaller than the image, you will see the center of this image in the PictureLabel, because the origin of the picture is repositioned this way in the paint-method - also, if the dimensions of the PictureLabel is greater than the image, the image will be in the center of the PictureLabel - so that you will see the background color of the underlying JLabel at the edges in this case. In the case the image cannot be loaded, you will see the filename centered in this label.
greetings Marsian