import java.io.IOException;
import java.io.ObjectOutputStream;

import java.net.Socket;
import java.net.UnknownHostException;

import javax.swing.JOptionPane;


public class ClientA {
    public ClientA() {
    }

    public static void main(String[] args) {
        runAll();
    }

    public static void runAll() {
        Socket s = null;
        ObjectOutputStream oos = null;
        try {
            s = new Socket(getIP(), 2013);
            oos = new ObjectOutputStream(s.getOutputStream());
            oos.writeObject("Waiting for connection..."); 
            oos.writeObject("Client conected...");
            String str1 = "12345";
            while (!str1.equals("poka")) {
                oos.writeObject(str1);
                str1 = JOptionPane.showInputDialog(null, "send?");
            }
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                oos.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
            try {
                s.close();
            } catch (IOException ioe) {
                // TODO: Add catch code
                ioe.printStackTrace();
            }
        }
    }
	private static String getIP(){
		String s;
		s = JOptionPane.showInputDialog(null, "conect to?");
		if(s!=null){
			return s;
		}
		return "localhost";
	}
}

import java.io.EOFException;
import java.io.IOException;
import java.io.ObjectInputStream;

import java.net.ServerSocket;
import java.net.Socket;
import javax.swing.*;

public class ServerA {
    public ServerA() {
    }

    public static void main(String[] args) {
        runAll();
    }
	private static void sendObject msg{
		JOptionPane.showMessageDialog(null, msg.toString());
	}
    public synchronized static void runAll() {
        int port = 2013;
        ServerSocket ss = null;
        ObjectInputStream ois = null;
        try {
            ss = new ServerSocket(port);
            Socket s = ss.accept();
            ois = new ObjectInputStream(s.getInputStream());
            Object o = ois.readObject();
            while (o != null) {
                ///System.out.println(""+o.toString());
                ///JOptionPane.showMessageDialog(null, "SERV-"+o.toString());
				sendo;
                o = ois.readObject();
                if (o == null) {
                    System.out.println("eto ya:BREAK");
                    break;
                }
            }

        } catch (EOFException eof) {
            System.out.println("Client Disconected!.....");
        } catch (IOException e) {
            System.out.println("problema I/O");
        } catch (ClassNotFoundException e) {
            System.out.println("Net klasa");
        } finally {
            try {
                ois.close();
                ss.close();
            } catch (IOException ioe) {
                // TODO: Add catch code
                ioe.printStackTrace();
            }
        }
    }
}