How to count number of JCheckboxes checked?

Question

I have 11 different checkboxes in my JFrame and want to be able to get a number whenever one is checked for how many total are checked. I know how to set up an ItemListener

Answer 1

add "ActionPerformed" event listener for all of your checkboxes & call this method inside event handler method to get number of checked checkboxes:

int countCheckedCheckBoxes(){
    Component[] cs = getRootPane().getComponents();
    int checkNums = 0;
    for(Component c : cs){
        if(c instanceof JCheckBox){
            if(((JCheckBox)c).isSelected()){
                checkNums++;
            }
        }
    }
    return checkNums;
}

getRootPane should return your main panel which components are located on it.