delphi 2009 之 TStringBuilder 类[1]: Create

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.

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