Open a Windows Folder on Windows Using Java

try {
    String[] cmd = new String[5];

    String url = "D:\\Program Files\\download";
    cmd[0] = "cmd";
       cmd[1] = "/c";
       cmd[2] = "start";
       cmd[3] = " ";
       cmd[4] = url; 

    Runtime.getRuntime().exec(cmd);
   } catch (IOException e) {
    e.printStackTrace();
   }