Allain Lalonde Allain Lalonde - 6 months ago 61
Java Question

JComboBox Selection Change Listener?

I'm trying to get an event to fire whenever a choice is made from a

JComboBox
.

The problem I'm having is that there is no obvious
addSelectionListener()
method.

I've tried to use
actionPerformed()
but it never fires.

Short of overriding the model for the
JComboBox
I'm out of ideas.

How do I get notified of a selection change on a
JComboBox
?


Edit: I have to apologize it turns out I was using a misbehaving subclass of
JComboBox
, but I'll leave the question up since your answer is good. Commence the vote down. :)

Answer

It should respond to ActionListeners, like this:

combo.addActionListener (new ActionListener () {
    public void actionPerformed(ActionEvent e) {
        doSomething();
    }
});

@John Calsbeek rightly points out that addItemListener() will work, too. You may get 2 ItemEvents, though, one for the deselection of the previously selected item, and another for the selection of the new item. Just don't use both event types!