create named class

Can you check my coding@program:

How to create a class named Employee with name and salary. Make a class Manager inherit from Employee with an instance field named department. Supply a method toString() that prints the manager?s name, department and salary. Make another class named Director which inherits from Manager that has an instance field named carAllowanceAmount. Supply the toString() method for Director that prints all of its instance variables. Also, write a program name TestQ3 that instantiates an object of each of these classes and invokes the toString() method of each of these object.
(Note: all instance variables must be assigned with private accessibility and methods with public accessibility)

My coding :


class Employee {
private String name = "Zam Norfaizah Binti Zain Baharin";
private int salary = 2500;

public String toString() {
return "Name : " + name + "\nSalary : " + salary;
}
}
class Manager extends Employee {
private String departName = "College Art and Sciences";

public String toString() {
return super.toString() + "\nDepartment Named : " + departName;
}
}
class Director extends Manager {
private int carAllowanceAmount = 500;

public String toString() {
return "The car allowance amount is : " + carAllowanceAmount;
}
}
public class TestQ3 {
public static void main(String args[]) {
Manager mnger = new Manager();
System.out.println(mnger.toString());
Director dir = new Director();
System.out.println(dir.toString());
}
}


Can you comment and give the reason? what the true coding?