code: public void itemStateChanged(ItemEvent ie) {
  		Object source = ie.getSource();
  		// System.out.println("ItemEvent:"+source);
  		if (source == socks5radio || source == socks4radio)
  			onSocksChange();
  		else if (source == up_check)
  			onUPChange();
  
  	}
docs: //////////////////////