unit Unit1;interfaceuses  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,  Dialogs, StdCtrls;type  TForm1 = class(TForm)    Button1: TButton;    procedure Button1Click(Sender: TObject);  end;var  Form1: TForm1;implementation{$R *.dfm}uses Generics.Collections;procedure TForm1.Button1Click(Sender: TObject);var  List: TList
    
     ;  i: Integer;  str: string;begin  List := TList
     
      .Create();  {Add}  List.Add(22);  List.Add(33);  List.Add(11);  {Count、Capacity}  ShowMessageFmt('Count: %d; Capacity: %d', [List.Count, List.Capacity]);  str := '';  for i in List do str := str + UIntToStr(i) + sLineBreak;  ShowMessage(str);  {Clear}  List.Clear;  ShowMessageFmt('Count: %d; Capacity: %d', [List.Count, List.Capacity]);  List.Free;end;end.