Dealing with multiple combo boxes.

Question

Hi all,
Yesterday I started a thread on the topic of using a main JComboBox, that when you select one of its items, 2 sub combo boxe's models are changed. Michael_Dunn helped me on this and gave me a great example. However, I don't want to have the 2nd combo box change the contents of the 3rd. I'd like the 1st combo box to control both the 2nd and the third. I modified his code a bit to make this true. However, when you select an item on the 1st box, and then change the item on either the 2nd or 3rd box, it sets the selection to both the 2nd and 3rd box. I'd like these boxes to behave normally, without one changing the other, except for the 1st boxe's control. This sounds a bit confusing the way I explain it, so just check out the code and you'll see what I mean. Also, here's the link to my previous thread: http://forum.java.sun.com/thread.jspa?threadID=702577 Any help would be greatly appreciated! Thanks!
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class Testing extends JFrame
  String[] cbo1Text = {"Snacks","Drinks","Cigarettes"};
  String[][] cbo2Text = {{"Chocolate Bar","Chips","Candy"},{"Soft","Beer","Wine","Spirits"},
                       {"Menthol","Camel","Marlboro","Lite"}};
  String[][][] cbo3Text = {{{"Choc1","Choc2","Choc3"},{"Chips1","Chips2","Chips3"},{"Candy1","Candy2","Candy3"}},
                      {{"Coca Cola","Pepsi","Dr Pepper","Solo"},{"Bud","Coors","Heinekken"},
                       {"Champagne","Chardonnay","Shiraz"},{"Bourbon","Scotch","Vodka"}},
                      {{"Menthol15","Menthol20","Menthol40"},{"Camel15","Camel20","Camel40"},
                       {"Marlboro15","Marlboro20","Marlboro40"},{"Lite15","Lite20","Lite40"}}};
  JComboBox cbo1 = new JComboBox(cbo1Text);
  JComboBox cbo2 = new JComboBox(cbo2Text[0]);
  JComboBox cbo3 = new JComboBox(cbo3Text[0][0]);
  public Testing()
    super("JComboBox Test");
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setLocation(400,300);
    setSize(300,300);
    getContentPane().setLayout(new FlowLayout());
    cbo1.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
        DefaultComboBoxModel cbo2NewModel = new DefaultComboBoxModel(cbo2Text[cbo1.getSelectedIndex()]);
        cbo2.setModel(cbo2NewModel);
        DefaultComboBoxModel cbo3NewModel = new DefaultComboBoxModel(cbo3Text[cbo1.getSelectedIndex()]/*[0]*/);
        cbo3.setModel(cbo3NewModel);}});
    /*cbo2.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
        DefaultComboBoxModel cbo3NewModel = new DefaultComboBoxModel(cbo3Text[cbo1.getSelectedIndex()][cbo2.getSelectedIndex()]);
        cbo3.setModel(cbo3NewModel);}});*/
    getContentPane().add(cbo1);
    getContentPane().add(cbo2);
    getContentPane().add(cbo3);
  public static void main(String[] args){new Testing().setVisible(true);}
}

Answer 1

this line
cbo3.setModel(cbo3NewModel);}});
which you changed to
cbo3.setModel(cbo2NewModel);}});
should be
cbo3.setModel(new DefaultComboBoxModel(cbo2Text[cbo1.getSelectedIndex()]));}});