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Help: JComboBoxes and Event handling

Hi,
I'm trying to create a JApplet that has several JComboBoxes. I have it designed but don't know how to get event handling to work. Does anyone know the JApplet equivalant of the following as this works with normal applets

public void itemStateChanged(ItemEvent e)
{
if(e.getSource() instanceof Choice)
{
userChoice = track.getSelectedItem();
repaint();
}
}

note that track is just the name of a JComboBox.
Thanks for your time.

bobbit31

what's the problem? something like this should work:

ItemListener il = new ItemListener() {
public void itemStateChanged(ItemEvent e)
{
if(e.getSource() instanceof Choice)
{
userChoice = track.getSelectedItem();
repaint();
}
}

};

JComboBox track = new JComboBox();
track.addItemListener(il);

johnome

ASKER

That works for Choices on normal applets but not on JComboBoxes for JApplets. It;s the instanceof Choice that's the problem. Do i use casting of some type?

ASKER CERTIFIED SOLUTION

bobbit31

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CEHJ

Not quite sure what the difficulty is here. The only thing you should watch is that deselection events occur as well.

public class A extends JApplet implements ItemListener {

public void init() {
Container contentPane =getContentPane();
try {
Vector items = new Vector(4);
items.add("1");
items.add("2");
items.add("3");
items.add("4");
DefaultComboBoxModel model = new DefaultComboBoxModel(items);
JComboBox combo = new JComboBox(model);
contentPane.add(combo, BorderLayout.NORTH);
combo.addItemListener(this);
}
catch(Exception e){
e.printStackTrace();
}
}

public void itemStateChanged(ItemEvent e) {
System.out.println(e);
}
}

johnome

ASKER

thanks very much bobbit

bobbit31

> thanks very much bobbit
no problem, but why the 'B' grade?

Mindphaser

Grade changed per request ...

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