unit Unit_Main;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    ListBox1: TListBox;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

  TPerson = class
  private
    Name:string;
    FirstName:string;
  public
    constructor Create();
    procedure setName(newName:string);
    procedure setFirstName(newFirstname:string);
    function getName():string;
    function getFirstName():string;
  end;

var
  Form1: TForm1;
  Person:TPerson;

implementation

{$R *.dfm}

constructor TPerson.Create;
begin
  inherited create;
  Name:='';
  FirstName:='';
end;

procedure TPerson.setName(newName:string);
begin
  Name:=newName;
end;

procedure TPerson.setFirstName(newFirstName:string);
Begin
  FirstName:=newFirstName;
End;

function TPerson.getName():string;
Begin
  result:=Name;
end;

function TPerson.getFirstName():string;
Begin
  result:=FirstName;
End;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Person:=TPerson.Create;
  Person.setName('Test_Nachname');
  Person.setFirstName('Test_Vorname');
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  Listbox1.Clear;
  Listbox1.Items.add(Person.getName());
  Listbox1.Items.add(Person.getFirstName());
end;

end.