Problem calling out servlet

Question

I have written an application using Visual Cafe. I tried to called out the application thru my server but i got this error below. Anyone has any idea whats wrong?
java.lang.NullPointerException
     at java.lang.ClassLoader.resolveClass0(Native Method)
     at java.lang.ClassLoader.resolveClass(ClassLoader.java:573)
     at org.apache.tomcat.loader.AdaptiveClassLoader.loadClass(AdaptiveClassLoader.java, Compiled Code)
     at org.apache.tomcat.loader.AdaptiveServletLoader.loadClass(AdaptiveServletLoader.java:174)
     at org.apache.tomcat.core.ServletWrapper.loadServlet(ServletWrapper.java:265)
     at org.apache.tomcat.core.ServletWrapper.init(ServletWrapper.java:289)
     at org.apache.tomcat.core.Handler.service(Handler.java, Compiled Code)
     at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java, Compiled Code)
     at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java, Compiled Code)
     at org.apache.tomcat.core.ContextManager.service(ContextManager.java, Compiled Code)
     at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java, Compiled Code)
     at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java, Compiled Code)
     at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java, Compiled Code)
     at java.lang.Thread.run(Thread.java:479)
Desperate.......

Answer 1

Below is the source code generated by Visual Cafe.I am using ver 4.
     A basic extension of the java.awt.Frame class
import java.awt.*;
import com.symantec.itools.javax.swing.actions.JActionButton;
import symantec.itools.awt.util.ToolBarPanel;
import symantec.itools.awt.ImageHTMLLink;
import symantec.itools.awt.util.ToolBarSpacer;
import javax.swing.JToolBar;
import com.symantec.itools.javax.swing.JToolBarSeparator;
import symantec.itools.awt.ImageButton;
import symantec.itools.awt.BorderPanel;
import symantec.itools.awt.KeyPressManagerPanel;
import com.symantec.itools.javax.swing.JButtonGroupPanel;
import symantec.itools.awt.StatusBar;
import javax.swing.*;
public class Prototype extends Frame
     public Prototype()
          // This code is automatically generated by Visual Cafe when you add
          // components to the visual environment. It instantiates and initializes
          // the components. To modify the code, only use code syntax that matches
          // what Visual Cafe can generate, or Visual Cafe may be unable to back
          // parse your Java file into its visual environment.
          //{{INIT_CONTROLS
          setLayout(null);
          setBackground(new java.awt.Color(215,215,215));
          setSize(600,449);
          setVisible(false);
          add(canvas1);
          canvas1.setBackground(java.awt.Color.white);
          canvas1.setBounds(96,0,408,449);
          try {
               toolBarPanel1.setIPadSides(10);
          catch(java.beans.PropertyVetoException e) { }
          try {
               toolBarPanel1.setIPadTop(10);
          catch(java.beans.PropertyVetoException e) { }
          try {
               toolBarPanel1.setOrientation(symantec.itools.awt.util.ToolBarPanel.VERTICAL);
          catch(java.beans.PropertyVetoException e) { }
          add(toolBarPanel1);
          toolBarPanel1.setBounds(504,0,96,449);
          try {
               imageHTMLLink1.setLinkURL(symantec.itools.net.RelativeURL.getURL("www.google.com"));
          catch (java.net.MalformedURLException error) { }
          catch(java.beans.PropertyVetoException e) { }
          try {
               imageHTMLLink1.setImageURL(new java.net.URL("file:///D:/FYP/google2.GIF"));
          catch (java.net.MalformedURLException error) { }
          catch(java.beans.PropertyVetoException e) { }
          toolBarPanel1.add(imageHTMLLink1);
          try {
               toolBarSpacer1.setSpace(20);
          catch(java.beans.PropertyVetoException e) { }
          toolBarPanel1.add(toolBarSpacer1);
          try {
               imageHTMLLink2.setImageURL(new java.net.URL("file:///D:/FYP/yahoo3.JPG"));
          catch (java.net.MalformedURLException error) { }
          catch(java.beans.PropertyVetoException e) { }
          toolBarPanel1.add(imageHTMLLink2);
          try {
               toolBarPanel3.setIPadBottom(10);
          catch(java.beans.PropertyVetoException e) { }
          try {
               toolBarPanel3.setIPadSides(10);
          catch(java.beans.PropertyVetoException e) { }
          try {
               toolBarPanel3.setIPadTop(10);
          catch(java.beans.PropertyVetoException e) { }
          try {
               toolBarPanel3.setOrientation(symantec.itools.awt.util.ToolBarPanel.VERTICAL);
          catch(java.beans.PropertyVetoException e) { }
          add(toolBarPanel3);
          toolBarPanel3.setBounds(0,192,96,48);
          button1.setLabel("Y");
          toolBarPanel3.add(button1);
          button1.setBackground(java.awt.Color.lightGray);
          button1.setFont(new Font("Dialog", Font.PLAIN, 15));
          button3.setLabel("N");
          toolBarPanel3.add(button3);
          button3.setBackground(java.awt.Color.lightGray);
          button3.setFont(new Font("Dialog", Font.PLAIN, 15));
          try {
               toolBarPanel4.setIPadSides(10);
          catch(java.beans.PropertyVetoException e) { }
          try {
               toolBarPanel4.setIPadTop(10);
          catch(java.beans.PropertyVetoException e) { }
          try {
               toolBarPanel4.setOrientation(symantec.itools.awt.util.ToolBarPanel.VERTICAL);
          catch(java.beans.PropertyVetoException e) { }
          add(toolBarPanel4);
          toolBarPanel4.setBounds(0,0,96,192);
          try {
               imageButton1.setImageURL(new java.net.URL("file:///D:/FYP/questions.JPG"));
          catch (java.net.MalformedURLException error) { }
          catch(java.beans.PropertyVetoException e) { }
          toolBarPanel4.add(imageButton1);
          try {
               toolBarSpacer2.setSpace(20);
          catch(java.beans.PropertyVetoException e) { }
          toolBarPanel4.add(toolBarSpacer2);
          try {
               imageButton2.setImageURL(new java.net.URL("file:///D:/FYP/pen.JPG"));
          catch (java.net.MalformedURLException error) { }
          catch(java.beans.PropertyVetoException e) { }
          toolBarPanel4.add(imageButton2);
          try {
               toolBarPanel5.setOrientation(symantec.itools.awt.util.ToolBarPanel.VERTICAL);
          catch(java.beans.PropertyVetoException e) { }
          add(toolBarPanel5);
          toolBarPanel5.setBounds(0,240,96,209);
          setTitle("A Simple Frame");
          //{{INIT_MENUS
          menu1.setLabel("Main");
          menu1.add(menuItem1);
          menuItem1.setLabel("MenuItem");
          menuBar1.add(menu1);
          menu2.setLabel("Tools");
          menu3.setLabel("Applications");
          menu3.add(menuItem2);
          menuItem2.setLabel("Powerpoint");
          menu3.add(menuItem3);
          menuItem3.setLabel("Words");
          menu2.add(menu3);
          menuBar1.add(menu2);
          menu4.setLabel("Help");
          menuBar1.add(menu4);
          //$$ menuBar1.move(0,423);
          setMenuBar(menuBar1);
          //{{REGISTER_LISTENERS
          SymWindow aSymWindow = new SymWindow();
          this.addWindowListener(aSymWindow);
     public Prototype(String title)
          this();
          setTitle(title);
* Shows or hides the component depending on the boolean flag b.
* @param b if true, show the component; otherwise, hide the component.
* @see java.awt.Component#isVisible
public void setVisible(boolean b)
          if(b)
               setLocation(50, 50);
          super.setVisible(b);
     static public void main(String args[])
          (new Prototype()).setVisible(true);
     public void addNotify()
     // Record the size of the window prior to calling parents addNotify.
     Dimension d = getSize();
          super.addNotify();
          if (fComponentsAdjusted)
               return;
          // Adjust components according to the insets
          Insets insets = getInsets();
          setSize(insets.left + insets.right + d.width, insets.top + insets.bottom + d.height);
          Component components[] = getComponents();
          for (int i = 0; i < components.length; i++)
               Point p = components.getLocation();
               p.translate(insets.left, insets.top);
               components[i].setLocation(p);
          fComponentsAdjusted = true;
// Used for addNotify check.
     boolean fComponentsAdjusted = false;
     //{{DECLARE_CONTROLS
     java.awt.Canvas canvas1 = new java.awt.Canvas();
     symantec.itools.awt.util.ToolBarPanel toolBarPanel1 = new symantec.itools.awt.util.ToolBarPanel();
     symantec.itools.awt.ImageHTMLLink imageHTMLLink1 = new symantec.itools.awt.ImageHTMLLink();
     symantec.itools.awt.util.ToolBarSpacer toolBarSpacer1 = new symantec.itools.awt.util.ToolBarSpacer();
     symantec.itools.awt.ImageHTMLLink imageHTMLLink2 = new symantec.itools.awt.ImageHTMLLink();
     symantec.itools.awt.util.ToolBarPanel toolBarPanel3 = new symantec.itools.awt.util.ToolBarPanel();
     java.awt.Button button1 = new java.awt.Button();
     java.awt.Button button3 = new java.awt.Button();
     symantec.itools.awt.util.ToolBarPanel toolBarPanel4 = new symantec.itools.awt.util.ToolBarPanel();
     symantec.itools.awt.ImageButton imageButton1 = new symantec.itools.awt.ImageButton();
     symantec.itools.awt.util.ToolBarSpacer toolBarSpacer2 = new symantec.itools.awt.util.ToolBarSpacer();
     symantec.itools.awt.ImageButton imageButton2 = new symantec.itools.awt.ImageButton();
     symantec.itools.awt.util.ToolBarPanel toolBarPanel5 = new symantec.itools.awt.util.ToolBarPanel();
     //{{DECLARE_MENUS
     java.awt.MenuBar menuBar1 = new java.awt.MenuBar();
     java.awt.Menu menu1 = new java.awt.Menu();
     java.awt.MenuItem menuItem1 = new java.awt.MenuItem();
     java.awt.Menu menu2 = new java.awt.Menu();
     java.awt.Menu menu3 = new java.awt.Menu();
     java.awt.MenuItem menuItem2 = new java.awt.MenuItem();
     java.awt.MenuItem menuItem3 = new java.awt.MenuItem();
     java.awt.Menu menu4 = new java.awt.Menu();
     class SymWindow extends java.awt.event.WindowAdapter
          public void windowClosing(java.awt.event.WindowEvent event)
               Object object = event.getSource();
               if (object == Prototype.this)
                    Prototype_WindowClosing(event);
     void Prototype_WindowClosing(java.awt.event.WindowEvent event)
          setVisible(false);          // hide the Frame