Whether the member variables of the parent class in the inheritance will be overwritten by the subclasses of Java

The parent class int num = 7;
Subclass int num = 9;
Will the parent class be overwritten by the quilt class?

Here are two examples:

A first example:

A second example:

The difference between these two examples is that there is only one sentence that proves that when a subclass inherits from a parent class, a member variable with the same name is a member of the parent class by default.
The variable is masked if you want to invoke the member variable of the parent class, use the Super keyword

Whether the member variables of the parent class in the inheritance will be overwritten by the subclasses of Java