Java/2D Graphics GUI/FilteredImageSource

Use FilteredImageSource

<source lang="java"> import java.awt.Button; import java.awt.Graphics; import java.awt.Image; import java.awt.MediaTracker; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.image.CropImageFilter; import java.awt.image.FilteredImageSource; import java.awt.image.ImageProducer; import javax.swing.JApplet; public class FilterLab extends JApplet implements ActionListener {

 private Image originalImage, filteredImage;
 private Button btn = new Button("FILTER");
 private CropImageFilter cropFilter = new CropImageFilter(50, 20, 120, 140);
 public void init() {
   originalImage = getImage(getDocumentBase(), "e.gif");
   MediaTracker tracker = new MediaTracker(this);
   tracker.addImage(originalImage, 0);
   try {
     tracker.waitForAll();
   } catch (Exception e) {
   }
   filteredImage = originalImage;
   btn.addActionListener(this);
   add(btn);
 }
 public void actionPerformed(ActionEvent ev) {
   filter();
   repaint();
 }
 private void filter() {
   ImageProducer producer = originalImage.getSource();
   producer = new FilteredImageSource(producer, cropFilter);
   filteredImage = createImage(producer);
 }
 public void paint(Graphics g) {
   g.drawImage(originalImage, 10, 50, this);
   g.drawImage(filteredImage, 271, 50, this);
 }

}

</source>