Is there a way to see which of 2 JComboBox's has been modified in the ActionListener?

Question

I have 2 JComboBox's in my app and when I change the value of 1 combobox it has to do something else than when I change the other combobox. When I change the first, the values of the the second should be modified but when I change the second it should do nothing. So is there a way to see which combobox has been changed?

Thanks!

Answer 1

sure, you should check event.getSource() to find the one you're interested in:

@Override
public void actionPerformed(ActionEvent event) {
    Object src = event.getSource();
    ...
}

Answer 2

You should be able to differentiate them from the ActionEvent's getSource() Object.

Alternatively, you can set a different "Action Command" using the setActionCommand() method and getActionCommand()

Answer 3

You can also directly add an anonymous actionListener to the combobox you need to listen for:

comboOne.addActionListener(new ActionListener() 
{
    public void actionPerformed(ActionEvent e) 
    {
        // make changes to comboTwo
    }
});