Sending files over a network

[blindasfcuk]

Does anybody know exactly how to send files over a network? My code so far is

private void SendFile()
        {

            JFileChooser fileChooser = new JFileChooser();

            fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);

            int result = fileChooser.showOpenDialog(this);
            if (result == JFileChooser.CANCEL_OPTION)
                return;
            File fileName = fileChooser.getSelectedFile();

            if (fileName == null || fileName.getName().equals(""))
                JOptionPane.showMessageDialog(this, "Unknown file name",
                                              "Unknown file name",
                                              JOptionPane.ERROR_MESSAGE);
            else {
                try { //Try to open.
                    
                   FileOutputStream fos = new FileOutputStream(fileName);
                    ObjectOutputStream oos = new ObjectOutputStream(fos);
                    oos.writeObject(fileName);

                    oos.flush();
                    oos.close();

                } catch (IOException ioException) {
                    JOptionPane.showMessageDialog(this,"Error Opening File to send.","Error",JOptionPane.ERROR_MESSAGE);
                    ioException.printStackTrace();

                }
            } //End else.
        }

//Inner Class for accepting connections
    //for file transfer
    class RecieveFilethread extends Thread{
        public void run(){
            while (true) {
                try {
                    //DatagramSocket fileSocket = new DatagramSocket(8008);
                    File newFile;

                    FileInputStream fis = new FileInputStream("temp.obj");
                    ObjectInputStream ois = new ObjectInputStream(fis);
                    newFile = (File) ois.readObject();
                    ois.close();
                    String name = newFile.getName();
                    JOptionPane.showConfirmDialog(null, name);

                } catch (IOException ioEx) {}
                catch(ClassNotFoundException cnfe){}
            }
        }
    }

But nothing is happening what am I doing wrong?