Super keyword, final keyword

The Super keyword    subclass can hide member variables and methods inherited from a parent class, and you can use the Super keyword if the subclass wants to use the member variables and methods that are hidden by the quilt class.     1. Calling the constructor of the parent class using the Super keyword the       subclass cannot inherit the constructor of the parent class, so if the subclass wants to use the constructor of the parent class, it must be used in the constructor method of the subclass and must be represented by the keyword super. It must also be used in the first sentence of the subclass's construction method.         2, using the Super keyword operation is hidden member variables and methods         such as  super.x        super.play () is used to access the call Quilt class hidden member variable X and method play ()      final keyword     The final keyword can be used to decorate classes, member variables, and local variables in methods      1, the final class final class can          not be inherited, that is, there can be no child class.     2           . The final method can be inherited by the quilt class, but cannot be overridden.    3. Final variable             

　　

Super keyword, final keyword