Jbutton in applet not appearing when embedded in webpage(jre1.6.0_02)

Question

Hi,
I am accessing a webcam from an applet embedded in a webpage using JMF 2.1. I am using JButtons using Image Icons. When i view the applet using applet viewer both the player and buttons appear fine. However when the applet is embedded in a jsp page the image JButtons don't appear at all. I am using jre1.6.0_02.
Following is the code( The capture and cancel JButtons dont appear when viewed in webpage):
import java.awt.*;
import java.io.*;
//import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.*;
import java.net.URL;
import java.net.URLConnection;
import javax.media.format.*;
import javax.media.control.*;
import javax.media.util.*;
import javax.media.*;
import javax.swing.ImageIcon;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
public class WebCamUnit extends JApplet implements ActionListener
     static final long serialVersionUID = -116069779446114664L;
     private static final String FILENAME_HEADER = "fileName";
     private static final String FILELASTMOD_HEADER = "fileLastMod";
     public static Player player = null;
     public CaptureDeviceInfo captureDeviceInfo = null;
     public MediaLocator ml = null;
     public JButton captureButton, cancelButton = null;
     public Buffer buf = null;
     public Image img = null;
     public VideoFormat vf = null;
     public BufferToImage btoi = null;
     public Component comp;
     public static boolean isTrue = true;
     public JPanel buttonPanel, playerPanel;
     public static String localDirectoryName = null;
     public static String serverDirectoryName = null;
     public static String servletURL = null;
     public static String localImageName = null;
     public static String serverImageName = null;
     String webCamDriverName = null;
     String middleButtonFilename = "TakePicture.JPG";
     String frontButtonFilename = "Cancel.JPG";
     public void init()
          localImageName = getParameter("LOCAL_IMAGE_NAME");
          serverImageName = getParameter("SERVER_IMAGE_NAME");
          localDirectoryName = getParameter("LOCAL_DIRECTORY_NAME");
          serverDirectoryName = getParameter("SERVER_DIRECTORY_NAME");
          servletURL = getParameter("SERVLET_URL");
          webCamDriverName = getParameter("WEBCAM_DRIVER_NAME");
          setLayout(new BorderLayout());
          setSize(320, 340);
          ImageIcon middleButtonIcon = new ImageIcon(middleButtonFilename);
          ImageIcon frontButtonIcon = new ImageIcon(frontButtonFilename);
          captureButton = new JButton(middleButtonIcon);
          cancelButton = new JButton(frontButtonIcon);
          captureButton.setBackground(Color.WHITE);
          captureButton.setContentAreaFilled(false);
          captureButton.setBorderPainted(false);
          captureButton.setFocusPainted(false);
          captureButton.addActionListener(this);
          captureButton.setEnabled(true);
          cancelButton.setBackground(Color.WHITE);
          cancelButton.setContentAreaFilled(false);
          cancelButton.setBorderPainted(false);
          cancelButton.setFocusPainted(false);
          cancelButton.addActionListener(this);
          cancelButton.setEnabled(true);
          buttonPanel = new JPanel();
          buttonPanel.add(captureButton);
          buttonPanel.add(cancelButton);
          buttonPanel.setBackground(Color.WHITE);
          getContentPane().add(buttonPanel, BorderLayout.CENTER);
          if(null==webCamDriverName)
               webCamDriverName = "vfw:Microsoft WDM Image Capture (Win32):2";
          captureDeviceInfo = CaptureDeviceManager.getDevice(webCamDriverName);
          ml = captureDeviceInfo.getLocator();
               try
                    player = Manager.createRealizedPlayer(ml);
               catch (Exception e)
               try
                    player.start();
               catch (Exception e)
     public void destroy()
          player.close();
     public void start()
          try
               if ((comp = player.getVisualComponent()) != null)
                    playerPanel = new JPanel();
                    comp.setBounds(0, 0, 320, 240);
                    playerPanel.add(comp);
                    getContentPane().add(playerPanel, BorderLayout.NORTH);
               player.start();
          catch (Exception e)
          setVisible(true);
          invalidate();
          repaint();
     public boolean action(Event e, Object o)
          return true;
     public void paint(Graphics g)
          super.paint(g);
     public static void playerclose()
          player.close();
          player.deallocate();
     public void actionPerformed(ActionEvent e)
          JComponent c = (JComponent) e.getSource();
          if (c == captureButton)
               player.stop();
               FrameGrabbingControl fgc = (FrameGrabbingControl) player
                         .getControl("javax.media.control.FrameGrabbingControl");
               buf = fgc.grabFrame();
               btoi = new BufferToImage((VideoFormat) buf.getFormat());
               img = btoi.createImage(buf);
               String newDir = localDirectoryName;
               boolean success = (new File(newDir)).mkdirs();
               String imageServername = localDirectoryName + localImageName;
               saveJPG(img, imageServername);
               isTrue = false;
          else
               if ((comp = player.getVisualComponent()) != null)
                    getContentPane().add(comp, BorderLayout.NORTH);
                    player.start();
               isTrue = true;
     public void stop()
          player.stop();
          player.deallocate();
          getContentPane().removeAll();
     public static void saveJPG(Image img, String s)
          img = img.getScaledInstance(160, 120, 1);
          BufferedImage bi = new BufferedImage(img.getWidth(null), img
                    .getHeight(null), BufferedImage.TYPE_INT_RGB);
          Graphics2D g2 = bi.createGraphics();
          g2.drawImage(img, 0, 0, null, null);
          FileOutputStream out = null;
          try
               out = new FileOutputStream(s);
          catch (java.io.FileNotFoundException io)
               String message = "File Not Found";
               JOptionPane pane = new JOptionPane(message);
               JDialog dialog = pane.createDialog(new JFrame(), "Dilaog");
               dialog.show();
          JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
          JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
          param.setQuality(0.50f, false);
          encoder.setJPEGEncodeParam(param);
          try
               encoder.encode(bi);
               out.close();
               try
               transferFile(localDirectoryName+localImageName,serverImageName,"",-1);
               catch (Exception e1)
                    String message = "Error occurred while transferring image to server!!";
                    JOptionPane pane = new JOptionPane(message);
                    JDialog dialog = pane.createDialog(new JFrame(), "Dilaog");
                    dialog.show();
               String message = "Image saved successfully!!";
               JOptionPane pane = new JOptionPane(message);
               JDialog dialog = pane.createDialog(new JFrame(), "Dilaog");
               dialog.show();
          catch (java.io.IOException io)
               String message = "Error occurred while saving image!!";
               JOptionPane pane = new JOptionPane(message);
               JDialog dialog = pane.createDialog(new JFrame(), "Dilaog");
               dialog.show();
          catch (Exception e)
        // this method transfers the prescribed file to the server.
        // if the destination directory is "", it transfers the file to      "d:\\".
        //11-21-02 Changes : This method now has a new parameter that references the item
        //that is being transferred in the import list.
        public static String transferFile(String srcFileName, String
     destFileName,
                                          String destDir, int itemID)
           if (destDir.equals(""))
              destDir = serverDirectoryName;
           // get the fully qualified filename and the mere filename.
           String fqfn = srcFileName;
           String fname = fqfn.substring(fqfn.lastIndexOf(File.separator)+1);
           try
              //importTable importer = jbInit.getImportTable();
              // create the file to be uploaded and a connection to      servlet.
              File fileToUpload = new File(fqfn);
              long fileSize = fileToUpload.length();
              // get last mod of this file.
              // The last mod is sent to the servlet as a header.
              long lastMod = fileToUpload.lastModified();
              String strLastMod = String.valueOf(lastMod);
              URL serverURL = new URL(servletURL);
              URLConnection serverCon = serverURL.openConnection();
              // a bunch of connection setup related things.
              serverCon.setDoInput(true);
              serverCon.setDoOutput(true);
              // Don't use a cached version of URL connection.
              serverCon.setUseCaches (false);
              serverCon.setDefaultUseCaches (false);
              // set headers and their values.
              serverCon.setRequestProperty("Content-Type",
                                           "application/octet-stream");
              serverCon.setRequestProperty("Content-Length",
              Long.toString(fileToUpload.length()));
              serverCon.setRequestProperty(FILENAME_HEADER, destDir + destFileName);
              serverCon.setRequestProperty(FILELASTMOD_HEADER, strLastMod);
             // if (webadminApplet.DEBUG) System.out.println("Connection with FTP server established");
              // create file stream and write stream to write file data.
              FileInputStream fis = new FileInputStream(fileToUpload);
              OutputStream os = serverCon.getOutputStream();
              try
                 // transfer the file in 4K chunks.
                 byte[] buffer = new byte[4096];
                 long byteCnt = 0;
                 //long percent = 0;
                 int newPercent = 0;
                 int oldPercent = 0;
                 while (true)
                    int bytes = fis.read(buffer);
                    byteCnt += bytes;
                    //11-21-02 :
                    //If itemID is greater than -1 this is an import file      transfer
                    //otherwise this is a header graphic file transfer.
                    if (bytes < 0) break;
                    os.write(buffer, 0, bytes);
                 os.flush();
                 //if (webadminApplet.DEBUG) System.out.println("No of bytes sent: " + byteCnt);
              finally
                 // close related streams.
                 os.close();
                 fis.close();
             // if (webadminApplet.DEBUG) System.out.println("File Transmission complete");
              // find out what the servlet has got to say in response.
              BufferedReader reader = new BufferedReader(
                             new
     InputStreamReader(serverCon.getInputStream()));
              try
                 String line;
                 while ((line = reader.readLine()) != null)
                   // if (webadminApplet.DEBUG) System.out.println(line);
              finally
                 // close the reader stream from servlet.
                 reader.close();
           } // end of the big try block.
           catch (Exception e)
              System.out.println("Exception during file transfer:\n" + e);
              e.printStackTrace();
              return("FTP failed. See Java Console for Errors.");
           }  // end of catch block.
           return("File: " + fname + " successfully transferred.");
        }  // end of method transferFile().
}

Answer 1

>
I am accessing a webcam from an applet embedded in a webpage using JMF 2.1. I am using JButtons using Image Icons. When i view the applet using applet viewer both the player and buttons appear fine. However when the applet is embedded in a jsp page the image JButtons don't appear at all. >That is probably because of security. Add 10 Dukes to the thread to indicate you are serious about resolving this, and I might expand on that answer.