Re: Trying to get JComboBox to "repopulate" with increased java.util.Vector

Knute Johnson <>
Fri, 09 Feb 2007 11:33:01 -0800
<N%3zh.56$YG2.37@newsfe14.lga> wrote:

On Feb 9, 2:13 pm, Knute Johnson <>
wrote: wrote:

On Feb 9, 1:11 pm, Knute Johnson <>

Does this do what you want?

Yes it does. And I am at a loss as to why I am unable to duplicate
your efforts.
Your framework, if I read correctly does this:
1) removes JComboBox from JFrame
2) instantiates new JComboBox
3) add JComboBox into JFrame
4) validate();
Mine does the following now:
1) removes JComboBox from JPanel p1
2) removes p1 and p2 from JFrame
3) instantiates new JComboBox
4) adds JComboBox into p1
5) re-adds p1 and p2 into JFrame
6) validate();
Based on these steps it appears logical that my rules should work just
as well as yours, however, upon implementing my set of rules the
entire application crashes, uses up 100% CPU memory resources and
forces me to have to ctrl-alt-delete it.

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
public class test extends JFrame {
     JTextField tf;
     JButton b;
     JComboBox cb;
     Vector v = new Vector();
     public test() {
         tf = new JTextField();
         b = new JButton("save url");
         b.addActionListener(new ActionListener() {
             public void actionPerformed(ActionEvent ae) {
                 String url = tf.getText();
                 cb = new JComboBox(v);
         cb = new JComboBox(v);
     public static void main (String[] args) {
         Runnable r = new Runnable() {
             public void run() {
                 new test();
Knute Johnson
email s/nospam/knute/

Are you calling validate() on the JFrame or the JPanel? For JPanel call

I am calling validate() on JFrame and revalidate() on JPanel, both to
no avail, although I can confirm that the JComboBox has an incremental
amount of items each time you enter a URL, so the JComboBox is
dynamically increasing, just not appearing except for the first URL it


Knute Johnson
email s/nospam/knute/

I think you are going to need to make a simple test program to show us
(and you) what you are doing. Chances are you've just got something out
of order somewhere.


Knute Johnson
email s/nospam/knute/

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