java反射机制小问题

Method me = clazz.getDeclaredMethod("printf",String.class );
参数要求是String name , Class[] parameterTypes;
但是出现异常：
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
The type java.lang.reflect.AnnotatedElement cannot be resolved. It is indirectly referenced from required .class files
The method getDeclaredMethod(String, Class[]) in the type Class is not applicable for the arguments (String, Class<T>)
at User_reflect.main(User_reflect.java:16)

clazz.getDeclaredMethod("printf",String.class );
对象中没有这个方法,编译出错了

类型参数不对