Issue with jtabbedpane created in class a, and data filled from b

Question

I hope that i can explain this clearly and succinctly. I have a tabbed pane that has 2 panels, a combobox, and some textfields in it. each pane has the same panels that l loaded from another class. Basically, i have a class that creates all the contents that would go into each pane and for each new tab, i create a new instance of that class. that solved my issue of not having to create a bunch of panels with different names. unfortunately, when i do an action on the combobox within the tab, the correct text field is not updated. It only modifies the last tab. does anyone know how i can specify the control i want to use withing that particular tab?? I will post a little pseudo to help describe what is going on:
class a
  panel1 = new JPanel();
textfield1 = new JtextField();
combobox1 = new JComboBox();
i then add these to the panel1;
actionlistener:
if combobox1.getSelectedItem().equals(1)
textfield1.setEditable(false);
end actionlistener
class b
for( i=0; i< 5; i++)
   tasktabs.add(new instance of class a)
}If this is confusing, i will try to cut my code down to show you.
Thanks,
Jason
}

Answer 1

attempt #2 (first post disappeared into the ether)
works OK like this (java 1.4.0_01)
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class Testing extends JFrame
  public Testing()
    setLocation(300,200);
    setSize(400,250);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    JTabbedPane tp = new JTabbedPane();
    tp.addTab("tab 1",new TabPanel());
    tp.addTab("tab 2",new TabPanel());
    tp.addTab("tab 3",new TabPanel());
    getContentPane().add(tp);
  public static void main(String[] args){new Testing().setVisible(true);}
class TabPanel extends JPanel
  public TabPanel()
    final JTextField tf = new JTextField(10);
    final JComboBox cbo = new JComboBox(new String[]{"0","1","2"});
    add(cbo);
    add(tf);
    cbo.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
        if(cbo.getSelectedItem().equals("1")) tf.setEditable(false);}});
}