イメージファイル重ね合わせ

public class ImageTest {

    public static void main(String[] args) throws IOException {
        BufferedImage bufferedImage1 = ImageIO.read(new File("C:\\image_test\\tree.jpg"));
        BufferedImage bufferedImage2 = ImageIO.read(new File("C:\\image_test\\star2.png"));

        Graphics graphics1 = null;

        try {
            graphics1 = bufferedImage1.getGraphics();
            int x = 2;
            int y = 2;
            graphics1.drawImage(bufferedImage2, x, y, null);

        } finally {
            graphics1.dispose();
        }

        ImageIO.write(bufferedImage1, "jpg", new File("C:\\image_test\\dst_jpg2.jpg"));
    }

}