Sunday 11pm - defeated by BLOB . Want to see whether you can do this ?

[achana chan]

Hi.
Dare I hope for one of those helpful hints I have been getting on and off ???
I have managed to "serialize" an image from a Blob (either .jpg or .gif) - that's the good news.
Trying to display them from the serialized record has been a disaster :
=> demoApplet: Connection com.developer.Tunnel.RemotedemoClient@659db7 has been initialized.
java.lang.NullPointerException
at sun.java2d.pipe.DrawImage.copyImage(Unknown Source)
at sun.java2d.pipe.DrawImage.copyImage(Unknown Source)
at sun.java2d.SunGraphics2D.drawImage(Unknown Source)
at sun.java2d.SunGraphics2D.drawImage(Unknown Source)
at com.developer.Tunnel.demoApplet.paint(demoApplet.java:235)
at sun.awt.RepaintArea.paint(Unknown Source)
at sun.awt.windows.WComponentPeer.handleEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
*******
Here is the code :

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.ImageIcon;
import java.net.*;
import java.util.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
public class demoApplet
  extends Applet
  implements ActionListener
{
  TextField EmpNo = new TextField(10);
  TextField EmpName = new TextField(20);
  Button search = new Button("Search");
  //
  Image thisCliPic;
  //int imageX, imageY; // for positioning the image
  //Image backBuffer = createImage(400,200);
  //Graphics backBufferG = backBuffer.getGraphics();
  //
  demoInterface demo;
  //
  public void init()
  {
    Label lbl01, lbl02, lbl03, lbl04, lbl05, lbl06; 
    Label lbl07, lbl08, lbl09, lbl10, lbl99;
    //
    lbl01 = new Label("Enter Client ID :", Label.RIGHT);
    lbl02 = new Label("Client Name :", Label.RIGHT);
    lbl99 = new Label("Press to search :", Label.RIGHT);
    // None of the results may be edited !
    EmpName.setEditable(false);
    FName.setEditable(false);
    Job.setEditable(false);
    Mgr.setEditable(false);
    HireDate.setEditable(false);
    Sal.setEditable(false);
    Comm.setEditable(false);
    DeptNo.setEditable(false);
    // Use a grid-bag layout
    GridBagLayout gridbag = new GridBagLayout();
    GridBagConstraints gbcon = new GridBagConstraints();
    setLayout(gridbag);
    // Set up reuseable constraints
    gbcon.weightx = 1.0;
    gbcon.weighty = 0.0;
    gbcon.anchor = gbcon.CENTER;
    gbcon.fill = gbcon.NONE;
    gbcon.gridwidth = gbcon.REMAINDER;
    //
    // Add listeners
    search.addActionListener(this);
    //
    // Add components
    add(lbl01);
    gridbag.setConstraints(EmpNo, gbcon);
    add(EmpNo);
    // 
    add(lbl02);
    gridbag.setConstraints(EmpName, gbcon);
    add(EmpName);
    //
    add(lbl99);
    gridbag.setConstraints(search, gbcon);
    add(search);
    // 
    
    //
    // Create an instance of the remote object...
    System.out.println("=> demoApplet: instantiating RemotedemoClient.");
    try
    {
      //demo = new RemotedemoClient(getCodeBase() + "/"); // try this first
      demo = new RemotedemoClient(getCodeBase().toString()); // then this one
      // open the database connection
      boolean rc = demo.connect();
      if (!rc)
      {
        System.out.println("=> demoApplet: Connection "+ demo+ " has not initialized !");
        demo = null;
      }
      else
      { System.out.println("=> demoApplet: Connection "+ demo+ " has been initialized.");
      }
    } //end of try-block
    catch (Exception ex) { ex.printStackTrace();}
  } //end of init-method
  //
  // -----------------
  //
  /**
  * Called when an applet is being destroyed.
  */
  public void destroy()
  {
    // if the remote object was created close the connection
    if (demo != null)
    {
      demo.close();
      demo = null;
    }   
  } // end of destroy()-method
  //
  // -----------------
  //
  /**
  * Process an action
  */
  public void actionPerformed(ActionEvent event)
  {
    Object obj = event.getSource();
    // Figure out which component caused the event
    if (obj == search)
    {
      // If no demo object was created, then exit
      // Otherwise clear display field and get empno entered by user
      if (demo == null)
      {
        return;
      }
      EmpName.setText("");
      //
      int thisEmpNo = 0;
      try
      {
        System.out.println("=>demoApplet : EmpNo.getText()= " + EmpNo.getText());   
        thisEmpNo = Integer.parseInt(EmpNo.getText());
      } //end of try-block
      catch (Exception ex) {ex.printStackTrace();}
      //
      // Get the emp record
      System.out.println("=>demoApplet : retrieving the database record. "); 
      empRecord thisEmpRec = demo.query(thisEmpNo);
      // populate
      if (thisEmpRec != null)
      {
        EmpName.setText(thisEmpRec.ename);
        // load and convert the image 
        // NB this works for .gif and .jpg only !
        System.out.println("=>demoApplet : Trying too load the PICTURE........... ");
        thisCliPic = new ImageIcon(thisEmpRec.picture).getImage();
        repaint();
        //
      } // end of it-then-else
 
    } // end of if-then-else
  } //end of actionPerformed()-method
//
// [B] here the culprit chipping away at my sanity... [/B]
//  
  public void update(Graphics grph)
  {
    System.out.println("=>demoApplet ... trying to paint(grph)");
    paint(grph);
  }
  public void paint(Graphics grph)
  {
    grph.drawImage(thisCliPic,500,150, this);
  }
} // end of demoApplet-applet

Regards
exhausted!
[ November 03, 2002: Message edited by: achana chan ]