public void itemStateChanged(ItemEvent event) { Object src = event.getSource(); // Check if it is the coupled background choice if (src == coupledBackgroundOnOffMenu) { coupledBackgroundOnOff = coupledBackgroundOnOffMenu.getState(); if (coupledBackgroundOnOff) { currentBackgroundColor = currentColor; backgroundColorMenu.setCurrent(currentColor); Color3f color = (Color3f) colors[currentColor].value; background.setColor(color); backgroundColorMenu.setEnabled(false); } else { backgroundColorMenu.setEnabled(true); } } // Handle all other checkboxes super.itemStateChanged(event); }