Save user profile photo while relogging on the system of a chat using socket

I developed a chat in Java using sockets where you have to choose a profile photo after login is done.

My question is: How would I save this user-chosen photo and reuse it in a future login? Just as Facebook is when you put a picture, it appears there again in the profile.

The code I put below is to take the picture, it takes the image and plays it in a JLabel:

foto.addMouseListener(new MouseListener() {

        @Override
        public void mouseReleased(MouseEvent e) {
            // TODO Auto-generated method stub
        }

        @Override
        public void mousePressed(MouseEvent e) {
            // TODO Auto-generated method stub
        }

        @Override
        public void mouseExited(MouseEvent e) {
            // TODO Auto-generated method stub
        }

        @Override
        public void mouseEntered(MouseEvent e) {
            foto.setToolTipText("Altere sua foto.");
        }

        @Override
        public void mouseClicked(MouseEvent e) {
            e.getComponent().setCursor(
                    Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
            JFileChooser chooser = new JFileChooser();

            FileNameExtensionFilter filter = new FileNameExtensionFilter(
                    "png", "jpg", "gif");

            chooser.setFileFilter(filter);

            int returnVal = chooser.showOpenDialog(getParent());

            if (returnVal == JFileChooser.APPROVE_OPTION) {
                File file = chooser.getSelectedFile();
                BufferedImage image = null;
                try {
                    image = ImageIO.read(file);
                    foto.setIcon(new ImageIcon(image.getScaledInstance(130,
                            130, Image.SCALE_DEFAULT)));
                } catch (IOException e1) {
                    e1.printStackTrace();
                }
            }
        }
    });