java - Use of setIcon on jLabel repeats old image

Question

I'm attempting to display an image that was downloaded from a website, with the use of setIcon and a jLabel

jLabel5.setIcon(new ImageIcon("image.png"));

At the start of the program, the image doesn't exist, it gets downloaded, and after that displayed, with no problems. But if it changes, even if it downloads a newer version of the image, it will display the old one, as if it had a cache of it or something.

Does someone know why this happens? How to get a workaround with or without this method?

I have also tried to do the following to see if it could help, with no success:

jLabel5.setIcon(null);
jLabel5.setIcon(new ImageIcon("image.png"));

It would display nothing and then the same old image again.

Answer 1

it will display the old one, as if it had a cache of it or something.

Yep, caching is the problem. Here are a couple of options:

//  This works using ImageIO

imageLabel.setIcon( new ImageIcon(ImageIO.read( new File(imageName) ) ) );

//  Or you can flush the image

ImageIcon icon = new ImageIcon(imageName);
icon.getImage().flush();
imageLabel.setIcon( icon );