I have read a lot of answers about this problem but I can't manage to find my error even on a simple code. Here is the problem : I'd like to draw an Image in a JLabel which is in a JPanel, but the paintComponent() method of the JLabel isn't called.
Here is the code :
The ImagePainter class should draw an image
public class ImagePainter extends JLabel{
private Image image;
public ImagePainter(){
try {
image = ImageIO.read(new File("src/testgui/image.png"));
} catch (IOException exception) {
exception.printStackTrace();
}
}
@Override
protected void paintComponent(Graphics g){
super.paintComponent(g);
g.drawImage(image, 0, 0, null);
System.out.println("in paintComponent");
}
}
Here is a standard JFrame. I took care to add the JPanel to the contentPane
public class Display extends JFrame{
public Display(){
JPanel jp = new JPanel();
ImagePainter i = new ImagePainter();
getContentPane().add(jp);
jp.add(i);
jp.repaint();
setSize(800, 800);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
And finally the main. I instanciate Display on the EDT like everyone tell to do :
public class Main {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable(){
@Override
public void run(){
Display d = new Display();
}
});
}
}
Finally, I observed that if I directly add the ImagePainter to the contentPane, the image is drawn correctly. It's probably a stupid error but I spend literally hours trying to find it and really can't see it. Thank you in advance !
