Server-old-error

package messagingchatroom;

import java.io.*;
import java.net.*;
import java.util.*;
import java.applet.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class Server extends JFrame {

    private JTextField userText;
    private JTextArea chatWindow;
    private ObjectOutputStream output;
    private ObjectOutputStream input;
    private ServerSocket server;
    private Socket connection;

    //Constructor
    public Server() {
        super("Instant Messenger");
        userText = new JTextField();
        userText.setEditable(false);

        userText.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent event) {
                sendMessage(event.getActionCommand());
                userText.setText("");
            }
        });

        add(userText, BorderLayout.NORTH);
        chatWindow = new JTextArea();
        add(new JScrollPane(chatWindow));
        setSize(300, 150);
        setVisible(true);
    }

    //set up the run the Server
    public void startRunnig() {
        try {
            server = new ServerSocket(6789, 100);
            while (true) {
                try {
                    waitForConnection();
                    setupStream();
                    whileChatting();
                } catch (EOFException eOFException) {
                    showMessage("\n Server ended the Connection !");
                } finally {
                    closeCarap();
                }
            }
        } catch (IOException iOException) {
            iOException.printStackTrace();
        }
    }

    //wait for connection , then display connection information
    private void waitForConnection() throws IOException {
        showMessage("Waiting for some one to  Connect !");
        connection = server.accept();
        showMessage(" Now connected to " + connection.getInetAddress().getHostName());

    }
//42 runnig
}