如何将图像的大小从URL调整为JPanel

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class ImageResizer extends JPanel {
    private static final long serialVersionUID = 1L;
    private Image image;

    public ImageResizer(Image image) {
        this.image = image;
        int width = image.getWidth(this);
        int height = image.getHeight(this);
        setPreferredSize(new Dimension(width, height));
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        g.drawImage(image, 0, 0, this);
    }

    public static void main(String[] args) {
        String imageUrl = "https://example.com/image.jpg";
        Image image = downloadImage(imageUrl);
        if (image != null) {
            ImageResizer imageResizer = new ImageResizer(image);
            JFrame frame = new JFrame("Image Resizer");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.getContentPane().add(imageResizer);
            frame.pack();
            frame.setLocationRelativeTo(null);
            frame.setVisible(true);
        }
    }

    private static Image downloadImage(String imageUrl) {
        try {
            URL url = new URL(imageUrl);
            try (InputStream inputStream = url.openStream()) {
                return ImageIO.read(inputStream);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}