public void say() { if (null != list && 0 != list.size()) { System.out.println("list..."); for (BeanInterface bean : list) { System.out.println(bean.getClass().getName()); } } else { System.out.println("List<BeanInterface> list is null !!!!!!!!!!"); } System.out.println(); if (null != map && 0 != map.size()) { System.out.println("map..."); for (Map.Entry<String, BeanInterface> entry : map.entrySet()) { System.out.println(entry.getKey() + " " + entry.getValue().getClass().getName()); } } else { System.out.println("Map<String, BeanInterface> map is null !!!!!!!!!!"); } System.out.println(); if (null != beanInterface) { System.out.println(beanInterface.getClass().getName()); } else { System.out.println("beanInterface is null..."); } }