"Soften image" Java applet

ButtPlet.java

/*
 * ButtPlet.java
 *
 * Created on Jun 24, 2011, 10:46:14 PM
 */
package foon;

import java.applet.Applet;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.awt.Color;
import java.awt.Graphics;
import java.io.FileInputStream;
import java.io.IOException;

/**
 *
 * @author ondra
 */
public class ButtPlet extends Applet {

    // FIXME: hardcoded is stupid
    private static final String imagePath = "/home/ondra/Pictures/gir.gif";

    private BufferedImage bi;

    /** Initializes the applet ButtPlet */
    @Override
    public void init() {
        try {
            java.awt.EventQueue.invokeAndWait(new Runnable() {

                @Override
                public void run() {
                    initComponents();
                }
            });
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    /** This method is called from within the init() method to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        imagePanel = new javax.swing.JPanel();

        setLayout(new java.awt.BorderLayout());

        imagePanel.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                imagePanelMouseClicked(evt);
            }
        });
        add(imagePanel, java.awt.BorderLayout.CENTER);
    }// </editor-fold>//GEN-END:initComponents

    private void imagePanelMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_imagePanelMouseClicked

        int btn = evt.getButton();
        if (bi == null)
            btn = MouseEvent.BUTTON2;

        if (btn == MouseEvent.BUTTON1)
        {
            int w = bi.getWidth(), h = bi.getHeight();

            BufferedImage newBi = new BufferedImage(w, h, bi.getType());

            // next two for loops: for each pixel
            for (int x = 0; x < w; ++x)
            {
                for (int y = 0; y < h; ++y)
                {
                    // array of neighbor pixels' color values
                    Color[] pixelVals = new Color[9];

                    // iterator into pixelVals
                    int pixie = 0;

                    // next two for loops: for all nine neighbors
                    for (int ax = x-1; ax <= x+1; ++ax)
                    {
                        for (int ay = y-1; ay <= y+1; ++ay)
                        {
                            if (ax < 0 || ay < 0 || ax >= w || ay >= h)
                            {
                                // out of bounds
                                continue;
                            }

                            // get color and store it into pixelVals
                            int clr = bi.getRGB(ax, ay);
                            pixelVals[pixie++] = new Color(clr, true);
                        }
                    }

                    // running sums for calculating average
                    int sumr = 0, sumg = 0, sumb = 0;

                    // pixie contains the actual number of elements used in pixelVals here
                    for (int i = 0; i < pixie; ++i)
                    {
                        sumr += pixelVals[i].getRed();
                        sumg += pixelVals[i].getGreen();
                        sumb += pixelVals[i].getBlue();
                    }

                    // calculate average color and set it in the new image
                    Color targetColor = new Color(sumr / pixie, sumg / pixie, sumb / pixie);
                    newBi.setRGB(x, y, targetColor.getRGB());
                }
            }

            bi = newBi;
            repaint();
        }
        else if (btn == MouseEvent.BUTTON2)
        {
            // reload image
            try
            {
                BufferedImage tmp = javax.imageio.ImageIO.read(new FileInputStream(imagePath));
                int w = tmp.getWidth(), h = tmp.getHeight();
                int[] pixels = tmp.getRGB(0, 0, w, h, null, 0, w);

                bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
                bi.setRGB(0, 0, w, h, pixels, 0, w);
            }
            catch (IOException _)
            {
            }

            repaint();
        }
    }//GEN-LAST:event_imagePanelMouseClicked

    @Override
    public void paint(Graphics g)
    {
        g.drawImage(bi, 0, 0, null);
    }

    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JPanel imagePanel;
    // End of variables declaration//GEN-END:variables
}