Get the number of checkboxes in Swing

I've a swing with some 50 check boxes, and a sample code for 3 is below.

JCheckBox checkboxOne = new JCheckBox("One");
JCheckBox checkboxTwo = new JCheckBox("Two");
JCheckBox checkboxThree = new JCheckBox("Three");


// add these check boxes to the container...

// add an action listener
ActionListener actionListener = new ActionHandler();
checkboxOne.addActionListener(actionListener);
checkboxTwo.addActionListener(actionListener);
checkboxThree.addActionListener(actionListener);
 
// code of the action listener class
 
class ActionHandler implements ActionListener {
    @Override
    public void actionPerformed(ActionEvent event) {
        JCheckBox checkbox = (JCheckBox) event.getSource();
        if (checkbox == checkboxOne) {
            System.out.println("Checkbox #1 is clicked");
        } else if (checkbox == checkboxTwo) {
            System.out.println("Checkbox #2 is clicked");
        } else if (checkbox == checkboxThree) {
            System.out.println("Checkbox #3 is clicked");
        }
    }
}

Here i want to loop through the 50 checkboxes like creating an ArrayList of the available checkboxes and loop them to check which is checked. I'm unable to understand on how to create a ArrayList of checkboxes.

I referred to Array of checkboxes in java, but i'm unable to understand how do i use it?

Please let me know how can do this.