client

public class Frame extends JFrame implements MouseListener, MouseMotionListener {

    /**
     *
     */
    private static final long serialVersionUID = 1L;
    int x = 200;
    int x2 = 100;
    int y = 200;
    int y2 = 100;
    int width = 50;

    int oldX, oldY;
    int oldX2, oldY2;

    static Socket sock;
    static BufferedReader in;
    static PrintWriter out;

    boolean dragging = false;

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Frame mf = new Frame();
        mf.setBounds(200,200,500,400);

        mf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        mf.setVisible(true);
        try {
            sock = new Socket("localhost", 2000);
            in = new BufferedReader(new InputStreamReader(sock.getInputStream()));
            out = new PrintWriter(sock.getOutputStream(), true);
        } catch (IOException e) {
            e.printStackTrace();
        }
        Thread severListener = new Thread(new Runnable() {

            @Override
            public void run() {
                // TODO Auto-generated method stub
                try {
                    String messageFromServer = in.readLine();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        });
    }

    public Frame() {

        this.addMouseListener(this);
        this.addMouseMotionListener(this);
    }

    @Override
    public void paint(Graphics g) {
        // TODO Auto-generated method stub
        super.paint(g);
        g.setColor(Color.GREEN);
        g.fillRect(x, y, width, width);

        g.setColor(Color.RED);
        g.fillRect(x2, y2, width, width);
    }



    @Override
    public void mouseDragged(MouseEvent e) {
        // TODO Auto-generated method stub
        if (dragging) {
            x = x + e.getX() - oldX;
            y = y + e.getY() - oldY;

            oldX = e.getX();
            oldY = e.getY();
            repaint();
        }

    }

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

    }

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

    }

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

    }

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

    }

    @Override
    public void mousePressed(MouseEvent e) {
        // TODO Auto-generated method stub
        int newX = e.getX();
        int newY = e.getY();

        if (newX >= x && newX <= x + width && newY >= y && newY <= y + width) {
            dragging = true;
            oldX = newX;
            oldY = newY;
        }
    }

    @Override
    public void mouseReleased(MouseEvent e) {
        // TODO Auto-generated method stub
        dragging = false;

    }

}