JComboBox: Trapping selection of items

I want to select items in a non-editable JComboBox by:
a) scrolling through and selecting with the mouse;
b) scrolling through with mouse or arrow keys and hitting [return];
c) using a KeySelectionManager to find an item be entering search characters then hit [return] or click with the mouse.
(a) seems to be the default behaviour, which is fine;
(b) arrows initially caused actionEvents to be fired, until I saw the tip on this site to use putClientProperty("JComboBox.lightweightKeyboardNavigation","Lightweight") - this now seems to work OK;
(c) is the problem.
I get an event every time I enter a character to search on, but I only want to know when the user selects an item with [return] or mouse-click. How and where should I trap these events to make this happen?
Sorry if this seems like a dumb question, but I'm new to Swing and I'm having trouble figuring out where and when to do all this event-handling stuff!
Thanks,
Chris

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Is it possible to select multiple items in a JComboBox
if yes, then how to do?
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ComboBoxModel extends ListModel and not ListSelectionModel, so i think JComboBox does not provide multiple selection. But u can try customizing ur combo box.. may be its possible.. not very sure
Shailesh

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1.Selecting the item when my mouse scroll wheel is rolled.
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Bug,... well, try this...
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
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JComboBox jc;
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public static void main(String[] args) {
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Our application uses an in-house class to keep a list of documents, and this class has APIs for navigation and deletion so forth. On the GUI, we display a JComboBox to show the name of the current document being viewed. This JComboBox is backed by a DefaultComboBoxModel which has a separate list containing only the names of the document. When a user selects a document from the JComboBox, the application jumps to the selected document, and when a user deletes a document, the corresponding document name is removed from the JComboBox.
The problem is that our in-house class behaves differently than DefaultComboBoxModel. When an item is removed from the in-house class, it points to the next item on the list (i.e. the index value renames the same), unless the last item of the list is removed, and then the index simply points to the new last item of the list. This behavior is intuitive and is in conformation to user requirements.
However, the DefaultComboBoxModel does the opposite with some oddity. When an item is removed from the ComboModel, the selectedIndex points to the previous item the list (i.e. the index value decrements by 1), unless it is the first item of the list, in which case it behaves even more oddly... it points to the next item in the list, but for some reason, the selectedIndex becomes 1 (instead of 0) as if the item to be deleted is still in the list!
So we have been having trouble keeping the in-house class and the JComboBox in sync. For one thing, when a user deletes a document, it renders twice for the next document to be viewed (one triggered by JComboBox automatically points to the previous doc, which is incorrect, and the second one is our code that forces JComboBox to select the next doc by setting selected index), and problems occur especially for the boundary cases. We ended up doing a hack - add an ActionListener to the JComboBox only when it receives a mouse-down event and remove the actionListener inside of the actionPerformed() code, so that we can force the JComboBox to display the correct document name without triggering document rendition.
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And the way to solve it with a custom MutableComboBoxModel (also does not auto select an item that is added):
import java.awt.*;
import java.util.*;
import javax.swing.*;
public class ListComboBoxModel extends AbstractListModel implements MutableComboBoxModel {
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        return items.size();
    @Override
    public Object getElementAt(int index) {
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    public void setSelectedItem(Object anItem) {
        if((selected != null && !selected.equals(anItem))
                || (selected == null && anItem != null)) {
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        return selected;
    @Override
    public void addElement(Object obj) {
        insertElementAt(obj, items.size());
    @Override
    public void removeElement(Object element) {
        removeElementAt(items.indexOf(element));
    @Override
    public void insertElementAt(Object element, int index) {
        items.add(index, element);
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            else {
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                        newSelection = items.get(index + 1);
                    break;
                case SELECT_PREVIOUS:
                    if(index == 0) {
                        newSelection = items.get(index + 1);
                    else {
                        newSelection = items.get(index - 1);
                    break;
                default:
                    assert false : "Unknown SelectionChange: " + changeOnRemove;
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}

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Hi
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Searching for Open Items
Use
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Procedure
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Hi
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Lalitk wrote:
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function to change its color goes like this:
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How can I select an item from a list component with a seperate button

This is a repost, I decided it'd probably be better here than
in the general discussion board. I will try to delete the other
one.
Hello Everyone,
This is my first post here. I am trying to figure out how to
select an item within a list component with a button. This button
is calling a function. I have searched for the past 3 hours online
and I can't find anything about it. I thought perhaps I could set
the selectedItem parameter, but that is read only, and I believe it
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Never mind found it. It is the property called selectedIndex
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JComboBox: Trapping selection of items

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