Java 检查 BufferedImage 是否为 GIF

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

public class CheckGIF {
    public static void main(String[] args) {
        try {
            BufferedImage image = ImageIO.read(new File("example.gif"));
            int type = image.getType();
            if (type == BufferedImage.TYPE_BYTE_INDEXED) {
                System.out.println("This is a GIF image.");
            } else {
                System.out.println("This is not a GIF image.");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}