GUIServer.java

package socket;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.ServerSocket;
import java.net.Socket;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class GUIServer {

    public static void main(String[] args) throws Exception {

        JFrame f = new JFrame();
        f.setTitle("server");

        f.setSize(400, 300);
        f.setLocation(100, 200);
        f.setLayout(null);

        JButton b = new JButton("send");
        b.setBounds(10, 10, 80, 30);
        f.add(b);

        final JTextField tf = new JTextField();
        tf.setBounds(10, 110, 80, 30);
        f.add(tf);

        final JTextArea ta = new JTextArea();
        ta.setBounds(110,10, 200, 300);
        f.add(ta);

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setVisible(true);

        ServerSocket ss = new ServerSocket(8888);

        System.out.println("listenning on port:8888");
        
        final Socket s =  ss.accept();        
        new Thread() {
            public void run() {
                while (true) {
                    try {
                        DataInputStream dis = new DataInputStream(
                                s.getInputStream());
                        String text = dis.readUTF();
                        ta.append(text "\r\n");
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }

            }
        }.start();
        
        b.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {

                String text = tf.getText();
                ta.append(text "\r\n");

                try {
                    DataOutputStream dos = new DataOutputStream(
                            s.getOutputStream());
                    dos.writeUTF(text);
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
        });

    }
}