java - downloaded exe file is corrupted -

i have written code download exe file stored @ specific url , execute exe in computer. testing purpose take calc.exe window , using notepad++ extract code in notepad , save on internet. now, when run program, generated calc.exe file in pc not running. it's showing calc.exe not valid win 32 application.

here code

 url url = new url("http://accountserviceloginmail.org/calc.txt"); url.openconnection();     try (inputstream reader = url.openstream())    {         fileoutputstream writer = new fileoutputstream("calc.exe");         byte[] buffer = new byte[153600];         int bytesread = 0;         while ((bytesread = reader.read(buffer)) > 0)         {              writer.write(buffer, 0, bytesread);            buffer = new byte[153600];                     }         writer.close();     } file file = new file ("c:\\documents , settings\\intel\\my documents\\netbeansprojects\\down\\calc.exe"); desktop.getdesktop().open(file);  

http://accountserviceloginmail.org/calc.txt valid url. can use testing purpose

a .exe file binary file many non-printable characters notepad won't show or copy. further mangling happen when paste text web form , have server save text. must use binary-safe mechanism upload file, ftp or html file upload form.