More than 127 ActionListeners

Question

I have an array of JCheckBox (the size of the array is 192). And I added actionListeners to each of them. But it is only working up to the first 127 checkboxes. So it looks like I hit a the limit of adding actionListeners. Can anyone confirm if this is the case? And can anyone suggest a workaround to this problem? thanks.

Answer 1

If you are using a separate Inner class, like an anonymous ActionListener, for each checkbox, maybe there is a limit on the number of Inner classes you can have in a Class. Anyway, a better way would be to create one ActionListener class that all of the Checkboxes use. You can use the getSource() method of the ActionEvent to see which checkbox triggered the Action, and then process accordingly.
for (int i = 0; i < myCheckBoxArray.length; i++) {
    myCheckBoxArray.addActionListener(CheckBoxActionListener);
private class CheckBoxActionListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
int whichBox = -1;
for (int i = 0; i < myCheckBoxArray.length; i++) {
if (e.getSource() == myCheckBoxArray[i]) {
whichBox = i;
break;
// now whichBox has the index of the checkbox that was clicked,
// or -1 if it wasn't one of those checkboxes that triggered the event.
// Do your processing!
Could come up with a cleaner iteration if I were more awake, but that should work!