Thread: Update JLabel with new ImageIcon

Hello!

I have a JFrame containing a JLabel, JButton and a JScrollPane like:

JButton b = new JButton();
JLabel l = new JLabel();
JScrollPane s = new JScrollPane(l);

From the constructor a method, getImage, is called. And the method look like this:

private void getImage() throws MalformedURLException {
 
 
        ImageIcon img = new ImageIcon(new URL("www.blablabla.com"));
 
        l.setIcon(img);
 
        repaint();
 
    }

The url-address is generating a random picture every time you visit the page.
The method above is also called when I'm clicking the JButton. The problem is that the image in the JLabel isn't updating. It only works when I'm starting the program.


Hank

Show the logic that periodically loads a new image and changes the JLabel's image.

Give your variables better names. Single-letter variable names are almost never appropriate except for some limited index/counters uses.

From within the constructor the getImage-method is called and it works perfectly. When I'm clicking at the JButton the actionPerformed-method is called, and within it the getImage-method is also called. It works, but no new picture is generated.

Hank

Then show the button's actionPerformed() method. You're also calling repaint(), but it's not clear on what component the repaint() is being called, so clarify that. Also, show that component's paintComponent() method.

Thanks for the help, man. It works now as I used ImageIO.read(InputStream) instead of url directly.