java的反射机制使用

通过反射对集合进行操作

@Test   Set<String> set = new HashSet<>();        set.addAll(Arrays.asList("my dog is very beautiful".split(" "))); try {            Class clazz = Class.forName(set.getClass().getName());            Method addName = clazz.getMethod("add", Object.class);            addName.invoke(set, 123);            for (String s : set) {                System.out.println(s);            }        } catch (Exception e) {            e.printStackTrace();        }