Delphi 2009之TStringBuilder类[1]: Create

unit Unit1;

interface
uses
　Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
　Dialogs, StdCtrls;
type
　TForm1 = class(TForm)
　　Button1: TButton;
　　Button2: TButton;
　　procedure Button1Click(Sender: TObject);
　　procedure Button2Click(Sender: TObject);
　end;

var

　Form1: TForm1;
implementation
{$R *.dfm}

//TStringBuilder.Create 可以无参数

procedure TForm1.Button1Click(Sender: TObject);
var
　sb: TStringBuilder;
begin
　sb := TStringBuilder.Create;
　sb.Append('Embarcadero');
　sb.Append(' CodeGear');
　sb.Append(' Delphi');
　sb.Append(' 2009');
　ShowMessage(sb.ToString); {Embarcadero CodeGear Delphi 2009}
　sb.Free;
end;

//TStringBuilder.Create 可用字符串初始化; 其他重载用处不大

procedure TForm1.Button2Click(Sender: TObject);
var
　sb: TStringBuilder;
begin
　sb := TStringBuilder.Create('Delphi ');
　sb.Append(2009);
　ShowMessage(sb.ToString); {Delphi 2009}
　sb.Free;
end;

end.