Java Create Watermark Text Or Fill Area To An Image

package com.pkm;

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;

public class WatermarkTextToImage {
    public static void main(String[] args) throws Exception {
 ImageIcon photo = new ImageIcon("100_6929.jpg");
 BufferedImage bufferedImage = new BufferedImage(photo.getIconWidth(),
  photo.getIconHeight(),
  BufferedImage.TYPE_INT_RGB);
        Graphics2D g2d = (Graphics2D) bufferedImage.getGraphics();

        g2d.drawImage(photo.getImage(), 0, 0, null);

        AlphaComposite alpha = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.5f);
        g2d.setComposite(alpha);

        g2d.setColor(Color.white);
        g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
         RenderingHints.VALUE_TEXT_ANTIALIAS_ON);

        g2d.setFont(new Font("Arial", Font.BOLD, 100));

        String watermark = "Pritom Kumar Mondal";

        FontMetrics fontMetrics = g2d.getFontMetrics();
        Rectangle2D rect = fontMetrics.getStringBounds(watermark, g2d);

        g2d.drawString(watermark,
         (photo.getIconWidth() - (int) rect.getWidth()) / 2,
         (photo.getIconHeight() - (int) rect.getHeight()) / 2);

        alpha = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.2f);
        g2d.setComposite(alpha);
        g2d.setColor(Color.red);
        g2d.fillOval(0, 0, photo.getIconWidth(), photo.getIconHeight());

        //Free graphic resources
        ImageIO.write(bufferedImage, "JPEG", new File("100_6929_Watermark.JPG"));
        g2d.dispose();
    }
}

Input & Output Image Respectively