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1. ×Ö·û´®Á¬½ÓÖ±½ÓÓÃ+£¬ÓëJavaºÍPythonÖеÄÏàͬ
2. Ö´ÐÐÍⲿÃüÁîʹÓÃwinexec£¬ShellExecute
    eg. ShellExecute(0, 'open', 'jre/bin/java', '-lang zh-CN', 'E:\myfolder', SW_SHOW);
3. ÅжÏÎļþ¡¢Îļþ¼ÐÊÇ·ñ´æÔÚ
    FileExists('C:\Users\bill\somefile.txt')
    DirectoryExits('C:\WINDOWS')
4. if else ½á¹¹
    if FileExists(Edit1.Text) then
    begin
       ....
    end // ²»¿É¼Ó·ÖºÅ
    else if DirectoryExits('Edit1.Text') then
    begin
       ....
    end // ²»¿É¼Ó·ÖºÅ
    else
    begin
      ....
    end;
5. »ñÈ¡ÆÁÄ»¿í¶È¸ß¶ÈÖ±½ÓʹÓà Screen.Width Screen.Height
6. ÉèÖô°¿ÚλÖà SetBounds(left. top, width, height)
   


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procedure TForm1.Button1Click(Sender: TObject);
var
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n:Integer;
D:Double;
i:Integer;
b:string;
begin
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