在没有ImageObserver的情况下在Java中获取图像的高度和宽度

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;

public class ImageSize {
    public static void main(String[] args) {
        try {
            File imageFile = new File("path/to/image.jpg");
            BufferedImage image = ImageIO.read(imageFile);
            int width = image.getWidth();
            int height = image.getHeight();
            System.out.println("Image width: " + width);
            System.out.println("Image height: " + height);
        } catch (IOException e) {
            System.err.println("Error reading image file.");
            e.printStackTrace();
        }
    }
}