我可以使JLabel的图标图像可调整大小吗？

Question

Just like we can resize a JFrame I'd like to show an image on a frame. I'd like to be it resizeable so when I resize the image should be resized.

How could I do this?

try {
    myPicture = ImageIO.read(f);
    picLabel.setIcon(new ImageIcon(myPicture));
    panel.add(picLabel);
} catch (IOException e) {
    e.printStackTrace();
}

I added the label (with the image) to a JPanel and the panel is added to the frame.

Answer 1

ImageIcons are always resizeable. Try converting it to an image , resizing it, convert it back to an ImageIcon , and then reapplying it (of course do this when you want to resize it).

Image myScaledPicture = myPicture.getImage().getScaledInstance(newWidth, newHeight, Image.SCALE_SMOOTH);
picLabel.setIcon(new ImageIcon(myScaledPicture);

More info here: How to resize JLabel ImageIcon?

Answer 2

You can use the Stretch Icon .

It can be used in any component that can paint an Icon and the image will scale as the component is resized.

It is reusable code so you don't have to do custom painting all the time.