Gif没有出现在JLabel中

Question

I'm currently developing a programme which utilises gifs to indicate loading on the programme. However, I can not get the gif to appear on the JLabel after trying several ideas. I have tested many things, including the following.

• Tried loading a png file instead of gif, this works, indicating no issue with the JLabel.
• Tried loading the gif into a JLabel in a completely separate programme, this also works, indicating no issue with the gif.
• Tried loading it in through URL AND through local resource, neither works.

The following snippet of code contains the main part of the declaration of the code. Any help is appreciated.

try {
        URL URL = new URL("https://i.imgur.com/sMD9yUD.gif");
        Icon Gif = new ImageIcon(URL);
        tempLoad1.setIcon(Gif);
    } catch (MalformedURLException e) {
        e.printStackTrace();
    }

    tempLoad1.setHorizontalAlignment(SwingConstants.CENTER);
    tempLoad1.setFont(new Font("Lato", Font.BOLD, 24));
    tempLoad1.setBounds(63, 111, 452, 71);
    contentPane.add(tempLoad1);

Note that tempLoad1 is declared at the start of the programme. I have also proved that this is not an issue.

Thanks in advance