package sockets;
 
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.util.logging.Level;
import java.util.logging.Logger;
 
/**
 *
 * @author debci
 */
public class ClienteGui extends javax.swing.JFrame {
            public static Socket socket;
            public static InputStream is;
            public static OutputStream os;
            public static DataInputStream dis;
            public static DataOutputStream dos;
    /** Creates new form ClienteGui */
    public ClienteGui() {
        initComponents();
    }
 
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
 
        jButton1 = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        textoEnv = new javax.swing.JTextArea();
 
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosed(java.awt.event.WindowEvent evt) {
                formWindowClosed(evt);
            }
            public void windowClosing(java.awt.event.WindowEvent evt) {
                formWindowClosing(evt);
            }
        });
 
        jButton1.setText("Enviar");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });
 
        textoEnv.setColumns(20);
        textoEnv.setRows(5);
        jScrollPane1.setViewportView(textoEnv);
 
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap(337, Short.MAX_VALUE)
                .addComponent(jButton1)
                .addContainerGap())
            .addGroup(layout.createSequentialGroup()
                .addGap(21, 21, 21)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(117, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap(89, Short.MAX_VALUE)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(83, 83, 83)
                .addComponent(jButton1)
                .addContainerGap())
        );
 
        pack();
    }// </editor-fold>
 
    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        try {
            String cadena = textoEnv.getText();
            dos.writeBoolean(true);
            dos.writeUTF(cadena);
 
        } catch (IOException ex) {
            Logger.getLogger(ClienteGui.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
 
    private void formWindowClosed(java.awt.event.WindowEvent evt) {
 
    }
 
    private void formWindowClosing(java.awt.event.WindowEvent evt) {
        try {
            dos.writeBoolean(false);
        } catch (IOException ex) {
            Logger.getLogger(ClienteGui.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
 
    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    new ClienteGui().setVisible(true);
                    socket = new Socket("localhost", 5557);
                    is = socket.getInputStream();
                    os = socket.getOutputStream();
                    dis = new DataInputStream(is);
                    dos = new DataOutputStream(os);
                } catch (IOException ex) {
                    Logger.getLogger(ClienteGui.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        });
    }
 
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea textoEnv;
    // End of variables declaration
 
}
 
 

package sockets;
 
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import threads.ThreadServidor;
 
/**
 *
 * @author debci
 */
public class Servidor {
 
    public static void main(String[] args) throws IOException {
      Servidor servidor = new Servidor();
      servidor.ServidorChat();
 
    }
 
   public void ServidorChat()
    {
        try
        {
            ServerSocket socketServidor = new ServerSocket(5557);
 
            while (true)
            {
                System.out.println("Esperando conexiones...");
                Socket cliente = socketServidor.accept();
 
                Runnable nuevoCliente = new ThreadServidor(cliente);
                Thread hilo = new Thread(nuevoCliente);
                hilo.start();
 
            }
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }
}
 
 
 

package threads;
 
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.util.logging.Level;
import java.util.logging.Logger;
 
/**
 *
 * @author debci
 */
public class ThreadServidor extends Thread {
 
//Socket al que esta conectado el cliente
    private Socket socket1;
 
/** Para lectura de datos en el socket */
    private DataInputStream dataInput;
 
    /** Para escritura de datos en el socket */
    private DataOutputStream dataOutput;
 
    private boolean acabado = true;
 
 
    public ThreadServidor(Socket socket) {
        try {
            socket1 = socket;
            dataInput = new DataInputStream(socket.getInputStream());
            dataOutput = new DataOutputStream(socket.getOutputStream());
 
        } catch (IOException ex) {
 
            System.err.println("Error de procesamiento de datos: \n" + ex);
 
        }
    }
 
    public void run() {
        try {
          while(acabado){
            acabado = dataInput.readBoolean();
            String mensajeRecivido = dataInput.readUTF();
            System.out.println(mensajeRecivido + "\n");
 
          }
 
        } catch (IOException ex) {
            Logger.getLogger(ThreadServidor.class.getName()).log(Level.SEVERE, null, ex);
        }
 

26-dic-2009 15:30:55 threads.ThreadServidor run
GRAVE: null
java.io.EOFException
        at java.io.DataInputStream.readUnsignedShort(DataInputStream.java:323)
        at java.io.DataInputStream.readUTF(DataInputStream.java:572)
        at java.io.DataInputStream.readUTF(DataInputStream.java:547)
        at threads.ThreadServidor.run(ThreadServidor.java:50)
        at java.lang.Thread.run(Thread.java:619)