🚀 go-pugleaf

I'm struggling with visibility and access and would welcome some help. 
I have a directory \Mysource containing UIDataClass.java and 
BusLogicDataClass.java, and have added 'package Mysource' to each file, 
and import statements for each class.

When I try to compile BusLogicDataClass.java I get a list of errors 
like so:

"Undefined variable or classname: txtfldName?" 

for each of the textfields in UIDataClass.java.

When I try to compile UIDataClass.java I get the following:

".\Mysource\BusLogicDataClass.java: Undefined variable or classname: 
txtfldName?
       name = txtfldName.getText()?;
               ^?"
  for each textfield.

It's probably something very basic which I'm missing - can anyone spot 
the wood for the trees? (summary code below) 

TIA

++ *Paul*
 ++ from Cheltenham, England   
 ++ Fri, 13 Mar 1998 18:44 GMT   
 ++ WinNT build 1381 + SP3
 ++ http://freespace.virgin.net/paul.richards/
......

/*
 * UIDataClass.java
 */

package Mysource;

import java.awt.*;

import Mysource.*;

public class UIDataClass extends Frame {
  public UIDataClass() {
    super();
    setLayout(null);
    addNotify();
    Insets insets = insets(); 
    // .....
    // set up UI buttons, labels, textfields ...
    // ....
    show();
  }

  public boolean handleEvent(Event evt) {
    // <snip>
  }

// Event handlers
       <snip>
  

// End of event handlers

  public static void main(String args[]) {
    new UIDataClass();
    BusLogicDataClass BLDC = new BusLogicDataClass();
  }

  Label label1;
  Label label2;
  TextField txtfldName;
  Label label3;
  TextField txtfldAddr1;
  Label label4;
  TextField txtfldAddr2;
  Label label5;
  TextField txtfldAddr3;
  Label label6;
  TextField txtfldAge;
  Label label7;
  TextField txtfldMortgage;
  Button btnAdd;
  Button btnView;
  Button btnExit;

// Other methods/variables:

}


/** 
* BusLogicDataClass.java
*/

package Mysource;

import Mysource.*;
import java.io.*;
import java.util.*;


public class BusLogicDataClass     // class to store data
{
  private String name;
  private String address1;
  private String address2;
  private String address3;
  private String age;
  private String mortgage;

 <snip>
  {
    BusLogicDataClass nameaddress = new BusLogicDataClass();
  }

  public BusLogicDataClass() // constructor
  {
   getTxtFields();
   setTxtFields();
  } // end constructor

  void getTxtFields()
  {
      name     = txtfldName.getText();
      address2 = txtfldAddr1.getText();
      address2 = txtfldAddr2.getText();
      address3 = txtfldAddr3.getText();
      age      = txtfldAge.getText();
      mortgage = txtfldMortgage.getText();
  }

   void setTxtFields()
  {
      txtfldName.setText("");
      txtfldAddr1.setText("");
      txtfldAddr2.setText("");
      txtfldAddr3.setText("");
      txtfldAge.setText("");
      txtfldMortgage.setText("");
  }

} // end class BusLogicDataClass