Inheritance Super Variables - Fail To Return Null

I'm writing a simple program in which I have a super class Person, inherited by the subclasses Customer and Employee (they inherit the variables ID, name and surname).

Java Code:

public class Person {
int id;
String name;
String surname;
public Person () {

[Code] .....

However the problem is here: when I try to get the variables ID, name and surname through my main class, they fail to return (0,null,null). Why is this? I have get-Methods in my subclasses which should return the super variables, but they are not.

Java Code:

public String getUser() {
return username;
}

public String getName() {
return super.name;
} mh_sh_highlight_all('java');