Hi,

[I'm floundering - please help]

Below is the short and simple code for my 4 classes: -

LogApp.java       - Applet driver code
Tier3Socket.java - Sets up and authorizes communication with the server
Tier3Logon.java  - Dialog box for Username/Password
*Tier3Welcome.java - Dialog box to display Last Login time/Login failures
etc
(Tier3Socket$Message.class) - Haven't sorted out main message passing yet
(Javascript)

(*) This appears to be the troublemaker.
[Java.lang.ClassNotFoundException:LogApp]

All sourcefiles have been Javac'd and all classes have been Jar'd. (Manifest
looks good)

If I remove any reference in LogApp to Tier3Welcome (and don't archive it)
everything is great! I get a dialog box, authorization either succeeds or
fails, and everything is peachy. So what am I, and Tier3Welcome, doing
wrong? All I want to do is (on successful authorization) pop-up a second box
that displays some verification details, and asks the user to click OK.

1) Can you only Extend Dialog once per (some Java unit of work) Interfaces?
2) Is it because I using the default package
3) Is it because I'm using the command line for JAR and am not JARing all
classes in the directory?
4) Typo?
5) Name and method scoping issues?

Cheers Richard Maher

PS. Once again, I am a newbie so appologies if it's simple. BTW Windows 2000

LogApp.java
===========

import java.applet.Applet;
import java.awt.*;
import java.net.*;
import java.io.IOException;

import java.util.Date;
import java.util.Properties;

public class LogApp extends Applet
{
   String Username = "";
   String Password = "";
   Boolean Pass = false;
   Tier3Socket Pipe;

   public void init()
   {
       if (!Authorize())
       {
           try
            {
              getAppletContext().showDocument
                  (new URL (getCodeBase()+"accessdenied.html"),"_top");
            }
           catch (Exception e) {e.printStackTrace(); }
       }
   }

   public boolean Authorize()
   {
       System.out.println("Step 1");
       int Port = Integer.parseInt(getParameter("PORT"));
       String Appl = getParameter("APPLICATION");
       System.out.println("Step 2");
       Pipe = new Tier3Socket(getCodeBase().getHost(),Port);
       System.out.println("Step 3");

       try {Pipe.open();} catch (Exception e) {return false;}
       System.out.println("Step 4");

       Object ParentFrame = getParent();
       while ((ParentFrame != null) &&
               !(ParentFrame instanceof Frame))
               {
               ParentFrame = ((Component)ParentFrame).getParent();
               }

       Frame Creds = (Frame)ParentFrame;

       Tier3Logon Logon = new Tier3Logon(Creds);

       requestFocus();

       if (Logon.LogonAborted)
           {
           System.out.println("Logon Aborted");
           }
       else
           {
           Username = Logon.InUser.getText();
           Password = Logon.InPass.getText();

           Pass = true;
           try {Pipe.handShake(Username, Password);}
           catch (Exception e)
               {
                 Pass = false;
                 e.printStackTrace();
                 System.out.println("Logon Failed");
               }
           }

       if (Pass && Logon.Cb.getState())
       {
//            Tier3Welcome Welcome = new Tier3Welcome(Creds, Appl,
Pipe.t3IdBuf);
//            requestFocus();
//            Welcome.dispose();
       }

       Logon.dispose();

       System.out.println("Step 5");
       return Pass;
   }

   public void destroy() {
   try
   {Pipe.close();}
   catch (IOException e)
         {e.printStackTrace();}

   super.destroy();
}

}

Tier3Socket.java
================

import java.io.BufferedOutputStream;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.lang.System;

public class Tier3Socket
{
public  static final
        String                HOSTCHARSET="ISO-8859-1";
public  static final
        String                T3ID = "T3$";
public  static final
        int                   MAXAPPMSG=510;
public  static final
        int                   HDRSIZ=2;
public  static final
        int                   USERSIZ=40;
public  static final
        int                   T3IDBUFSIZ=48;
public  static final
        int                   CREDBUFSIZ=80;

public  byte []               t3IdBuf;

private String                host;
private int                   port;
private Socket                t3Sock;
private BufferedInputStream   in;
private BufferedOutputStream  out;
private byte []               MsgHdr;
private byte []               OutUser;
private byte []               OutPwd;
private byte []               CredBuf;

private String                inMsg;

public class Message
{
 String type;
 String message;
 Message (String type , String message)
 {
  this.type = type;
  this.message = message;
 }
 public String getMessage()
 {
  return message;
 }
 public String getType()
 {
  return type;
 }

}
Tier3Socket (String host, int port)
{
 this.host = host;
 this.port = port;

 MsgHdr  = new byte[HDRSIZ];
 t3IdBuf = new byte[T3IDBUFSIZ];
}

public void open() throws UnknownHostException, IOException
{
 t3Sock = new Socket();

 t3Sock.setKeepAlive(new Boolean(true));
 t3Sock.setSoTimeout(new Integer(10000));
 t3Sock.setTcpNoDelay(new Boolean(true));

 t3Sock.connect(new InetSocketAddress(host,port), new Integer(3));

 in  = new BufferedInputStream  (t3Sock.getInputStream() ,MAXAPPMSG);
 out = new BufferedOutputStream (t3Sock.getOutputStream(),MAXAPPMSG);
}

public void handShake(String Username, String Password) throws IOException
{
 CredBuf = new byte[CREDBUFSIZ];

 OutUser = Username.getBytes(HOSTCHARSET);
 System.arraycopy(OutUser, 0, CredBuf, 0, OutUser.length);

 OutPwd  = Password.getBytes(HOSTCHARSET);
 System.arraycopy(OutPwd, 0, CredBuf, USERSIZ, OutPwd.length);

 out.write(CredBuf, 0, CREDBUFSIZ);
 out.flush();

 if (in.read(t3IdBuf) < t3IdBuf.length)
 {
     System.out.println("Read < " + Integer.toString(t3IdBuf.length) + "
read");
     throw new IOException();
 }

 inMsg = new String(t3IdBuf, 0, 3, HOSTCHARSET);

 if (!inMsg.equals(T3ID))
 {
     throw new IOException();
 }

}

public void close () throws IOException
{
 if (t3Sock != null && !t3Sock.isClosed())
 {
     try {t3Sock.close();}
     catch (Exception e)
           {e.printStackTrace();}
 }
}

public void sendMessage (String type , String message) throws IOException
{
 byte [] msgtype = type.getBytes(HOSTCHARSET);
 byte [] msg     = message.getBytes(HOSTCHARSET);

 out.write(msgtype);
 out.write(msg);
 out.flush();
}

public Message readMessage () throws IOException
{

 if (in.read(MsgHdr, 0, HDRSIZ) < HDRSIZ)
 {
     throw new IOException();
 }

 String wholemsg = "Hello";
 String type = wholemsg.substring(0,2);
 String msg  = wholemsg.substring(2);
 return new Message (type , msg);
}

public void initEmployeeRead (String employee) throws IOException
{
 sendMessage ("20" , employee);
}

public String readNextEmployee () throws IOException
{
 Message msg = readMessage ();
 if (msg.getType().equals("21"))
  return msg.getMessage().trim();
 return null;
}
}

Tier3Logon.java
===============

import java.awt.*;
import java.awt.event.*;

public class Tier3Logon extends Dialog
                       implements ActionListener
{
   Label Headr = new Label("Server Authentication Required",Label.LEFT);
   Label User  = new Label("Username:", Label.RIGHT);
   Label Pass  = new Label("Password:", Label.RIGHT);

   TextField InUser = new TextField(40);
   TextField InPass = new TextField(40);

   Button Okay = new Button("OK");
   Button Cncl = new Button("Cancel");

   Checkbox Cb = new Checkbox("Display logon confirmation",true);

   boolean LogonAborted = false;

   public Tier3Logon(Frame Dframe)
   {
       super(Dframe,"Tier3 Logon",true);

       setBackground(Color.white);

       Headr.setFont(new Font("Helvetica", Font.BOLD, 14));

       InPass.setEchoChar('*');

       Panel Top = new Panel();
       Top.setLayout(new GridLayout(1, 2, 8, 2));
       Top.add(Headr);
       Top.add(Cb);
       add("North", Top);

       Panel pc = new Panel();
       pc.setLayout(new GridLayout(2, 2, 8, 2));
       pc.add(User);
       pc.add(InUser);
       pc.add(Pass);
       pc.add(InPass);
       add("Center", pc);

       Okay.addActionListener(this);
       Cncl.addActionListener(this);

       Panel pb = new Panel();
       pb.add(Okay);
       pb.add(Cncl);
       add("South", pb);

       setBounds(50, 150, 300, 300);
       pack();
       setResizable(false);
       setVisible(true);
   }

   public void actionPerformed(ActionEvent ae)
   {
       if (ae.getSource() == Okay)
           {
           setVisible(false);
           }
       else
           {
           LogonAborted = true;
           setVisible(false);
           }
   }
}

Tier3Welcome.java
=================

import java.awt.*;
import java.awt.event.*;

public class Tier3Welcome extends Dialog
                         implements ActionListener
{
   Button Okay = new Button("OK");
   Label Label1 = new Label();

   public Tier3Welcome(Frame Wframe, String AppName, byte[] t3IdBuf)
   {
       super(Wframe,"Tier3 Confirmation",true);

       String Line1 = "Welcome to the " + AppName + " application via TIER3
V" +
                      Byte.toString(t3IdBuf[3]) + "." +
Byte.toString(t3IdBuf[4]) +
                      " on node " + new String(t3IdBuf, 5, 6);

       Label1.setAlignment(Label.LEFT);
       Label1.setText(Line1);
       Label1.setFont(new Font("Helvetica", Font.BOLD, 14));

       Panel top = new Panel();
       top.setLayout(new GridLayout(2, 1, 0, 8));
       top.add(Label1);

       Okay.addActionListener(this);
       top.add(Okay);

       add("Center", top);

       setBounds(50, 150, 300, 300);
       pack();
       setResizable(false);
       setVisible(true);
   }

   public void actionPerformed(ActionEvent ae)
   {
       if (ae.getSource() == Okay)
           setVisible(false);
   }
}