Which methods are not allowed to be overridden?

1. subject

 Methods that are not allowed to be overridden include ？
A. Class quilt final modification 
B. Method is final modification 
C. Method is static modification 
D. Method is protected modification 

2. analysis

1.A Options . A class is final modification , Then this class cannot be inherited , Therefore, there is no chance that the methods of this class will be overridden .
It should also be clear here rewrite and heavy load The difference between , rewrite Occurs between subclasses and superclasses , Subclasses override methods of the parent class , Method name 、 Return value 、 The parameters are the same ; heavy load Occurs in the same class , You can simply understand different implementations of the same method , Same method name , Different parameters , The return value can be the same or different （ Generally the same ）.
Sample code ：

public final class