JavaFX - Check if a checkbox is ticked

Question

I am trying to write some code to determine whether or not my checkbox is ticked, I am aware I can write something like to change its state to checked

checkbox.setSelected(true);

But I want to write something along the lines of

if(checkbox.setSelected(true)){
   write login-username to config file
} else {
   clear the config file
}

How would I go about doing this? I've been trauling through Oracle documentation but have yet to find anything useful

thanks.

Answer 1

Have you tried registering a listener to the "selected" property of the checkbox? It would look something like this:

yourCheckbox.selectedProperty().addListener(new ChangeListener<Boolean>() {

        @Override
        public void changed(ObservableValue<? extends Boolean> observable, Boolean oldValue, Boolean newValue) {
            // TODO Auto-generated method stub
            if(newValue){

                // your checkbox has been ticked. 
                // write login-username to config file

            }else{

                // your checkbox has been unticked. do stuff...
                // clear the config file
            }
        }
    });