Inheriting variables Flashcards
Give the rule for inheriting variables !
Variables can not be overridden, they can only be hidden by
declaring a variable in the subclass with the same name as the variable in the super class
When you create a variable in the child class with the same name as the variable in the parent class, this creates 2 copies of that variable within an instance of the child class, one copie for the parent reference and one copie for the child reference
Give an example to showcase that the variable is hidden and not overridden !
class Flamingo {
protected int variable=47;
}
class TEST extends Flamingo {
private int variable=127;
public static void main(String[] args) {
Flamingo f=new TEST();
System.out.println(f.variable);
}
}
OUTPUT : 47
Do the rules change when the variables are static ?
no
Give a good practice for naming variables in a child class (with an example) !
When defining a new variable in a child class, it is considered good coding practice to select a name for the variable that is not already a public, protected, or default variable in use in a parent class.
