将父级转换为子级 - BufferedImage对象

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

public class BufferedImageExample {
    public static void main(String[] args) {
        try {
            // 读取父级图像文件
            BufferedImage parentImage = ImageIO.read(new File("parent.jpg"));

            // 创建一个新的BufferedImage对象，并将父级图像数据复制到子级图像中
            BufferedImage childImage = new BufferedImage(parentImage.getWidth(), parentImage.getHeight(), parentImage.getType());
            childImage.getGraphics().drawImage(parentImage, 0, 0, null);

            // 将子级图像写入到文件中
            ImageIO.write(childImage, "jpg", new File("child.jpg"));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

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