将文件从源文件夹移动到桌面

Question

我正在尝试从源文件中移动文件以自动保存到桌面。基本上这是一个传入的文件，我希望它对用户可见，这是他/她的桌面，我认为我在正确的轨道上，但这段代码不起作用，以前的修改不起作用也可以有人指出我在正确的方向？

 System.out.println("Waiting For File......");



 int filesize = 6022386;
            byte[] mybytearray = new byte[filesize];
            InputStream is;

            is = connection_download.getInputStream();

            FileOutputStream fos;

            // obtain header (fileName) 
            DataInputStream clientData = new DataInputStream(is);
            String fileName = clientData.readUTF();
            OutputStream output = new FileOutputStream(fileName);
            System.out.println(fileName);
            fos = new FileOutputStream(fileName);

            BufferedOutputStream bos = new BufferedOutputStream(fos);
            bytesRead = is.read(mybytearray, 0, mybytearray.length);
            current = bytesRead;

            do {
                bytesRead = is.read(mybytearray, current, (mybytearray.length - current));
                if (bytesRead >= 0) {
                    current += bytesRead;
                }
            } while (bytesRead > -1);
            bos.write(mybytearray, 0, current);
            bos.flush();
            System.out.println(fileName.length());
            long end = System.currentTimeMillis();
            System.out.println("DONE");
            bos.close();
            // complete file
            complete = new File(fileName);
            if (isMacOs == true) {
                downloadMac(complete);

            } else if (isWindowsOS == true) {
                downloadWindows(complete);
            }

        } catch (IOException ex) {
            Logger.getLogger(downloadFile.class.getName()).log(Level.SEVERE, null, ex);
        }

    }
}

public void downloadMac(File complete) {
    JOptionPane.showMessageDialog(null, "Your Files Will be Saved To Your Desktop");

    String OS_Path = System.getProperty("user.home");
    String savedLocation = OS_Path + "/Desktop/" + complete;
    File downloadedLocation = new File(savedLocation);
    System.out.println(downloadedLocation);

}