Overriding a super class's instance variables

Question

Why are we not able to override an instance variable of a super class in a subclass?

Answer 1

class Dad{
    public String name = "Dad";
}
class Son extends Dad{
    public String name = "Son";
    public String getName(){
        return this.name;
    }
}

From main() method if you call

new Son().getName();

will return "Son" This is how you can override the variable of super class.