Adding Text to a Buffered Image

Question

Hey
I am trying to add text to a bufferedimage image and have tried a couple of ways.
I cannot seem to get it to work propely though. Everytime i try, the text appears but the image appears inside the lettering of the text and not under it like i want it to.
Could someone please explain the best way of place text on TOP of an image as i am really stuck now :(
Thanks in advanced for any help

Answer 1

Basically paint your buffered image into a new BufferedImage and then paint in the new text on top.
Here's a demo.
import java.awt.*;
import java.awt.font.*;
import java.awt.geom.*;
import java.awt.image.BufferedImage;
import javax.swing.*;
public class BufferedImageTest
    public static void main(String[] args)
        ImageGenerator ig = new ImageGenerator();
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(ig.getOriginalImagePanel(), "North");
        f.getContentPane().add(ig.getTextPanel(), "South");
        f.setSize(400,640);
        f.setLocation(200,50);
        f.setVisible(true);
        f.getContentPane().add(ig.getNewImagePanel());
        f.validate();
        f.repaint();
class ImageGenerator
    JPanel originalPanel = new JPanel()
        public void paintComponent(Graphics g)
            super.paintComponent(g);
            Graphics2D g2 = (Graphics2D)g;
            g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                                RenderingHints.VALUE_ANTIALIAS_ON);
            int w = getWidth();
            int h = getHeight();
            g2.setPaint(Color.blue);
            g2.fill(new Rectangle2D.Double(w/16, h/16, w*7/8, h*7/8));
            g2.setPaint(Color.yellow);
            g2.fill(new Rectangle2D.Double(w/8, h/8, w*3/4, h*3/4));
            g2.setPaint(Color.red);
            g2.fill(new Ellipse2D.Double(w/6, h/6, w*2/3, h*2/3));
            g2.setPaint(Color.green);
            g2.draw(new Line2D.Double(w/16, h/16, w*15/16, h*15/16));
    JPanel textPanel = new JPanel()
        Font font = new Font("lucida sans regular", Font.PLAIN, 32);
        String text = "A New Label";
        public void paintComponent(Graphics g)
            super.paintComponent(g);
            Graphics2D g2 = (Graphics2D)g;
            g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                                RenderingHints.VALUE_ANTIALIAS_ON);
            g2.setFont(font);
            FontRenderContext frc = g2.getFontRenderContext();
            LineMetrics lm = font.getLineMetrics(text, frc);
            float textWidth = (float)font.getStringBounds(text, frc).getWidth();
            int w = getWidth();
            int h = getHeight();
            float x = (w - textWidth)/2;
            float y = (h + lm.getHeight())/2 - lm.getDescent();
            g2.drawString(text, x, y);
    public ImageGenerator()
        originalPanel.setBackground(Color.white);
        originalPanel.setPreferredSize(new Dimension(300,200));
        textPanel.setOpaque(false);
        textPanel.setPreferredSize(new Dimension(300,200));
    private BufferedImage createNewImage()
        BufferedImage image = new BufferedImage(originalPanel.getWidth(),
                                                originalPanel.getHeight(),
                                                BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = image.createGraphics();
        originalPanel.paint(g2);
        textPanel.paint(g2);
        g2.dispose();
        return image;
    public JPanel getOriginalImagePanel()
        return originalPanel;
    public JPanel getTextPanel()
        return textPanel;
    public JPanel getNewImagePanel()
        JPanel panel = new JPanel()
            BufferedImage image = createNewImage();
            public void paintComponent(Graphics g)
                super.paintComponent(g);
                Graphics2D g2 = (Graphics2D)g;
                g2.drawImage(image, null, 0, 0);
        return panel;
}