Cliente.java

   1 /**
   2  * Cliente.java
   3  * 
   4  * @author Luis Alejandro Bernal
   5  * 
   6  * La parte cliente de un chat de un solo canal. Su objetivo es didáctivo por lo que trata de
   7  * ser muy sencillo.
   8  */
   9 
  10 import java.awt.BorderLayout;
  11 import java.awt.FlowLayout;
  12 import java.awt.event.ActionEvent;
  13 import java.awt.event.ActionListener;
  14 import java.io.BufferedReader;
  15 import java.io.IOException;
  16 import java.io.InputStreamReader;
  17 import java.io.PrintStream;
  18 import java.net.Socket;
  19 
  20 import javax.swing.JButton;
  21 import javax.swing.JFrame;
  22 import javax.swing.JPanel;
  23 import javax.swing.JTextArea;
  24 import javax.swing.JTextField;
  25 
  26 class AccionEnviar implements ActionListener{
  27         private JTextField areaTexto;
  28         private PrintStream salida;
  29         private String login;
  30          
  31         public AccionEnviar(Socket s, JTextField at, String l){
  32                 areaTexto = at;
  33                 try {
  34                         salida = new PrintStream(s.getOutputStream());
  35                 } catch (IOException e) {
  36                         e.printStackTrace();
  37                 }
  38                 login = l;
  39         }
  40         
  41         public void actionPerformed(ActionEvent e){
  42                 salida.println(login + "> " + areaTexto.getText() );
  43                 areaTexto.setText("");
  44         }       
  45 }
  46 
  47 class Talk {
  48         private Socket socket;
  49         private String login; 
  50         
  51         public Talk(Socket s, String l){
  52                 socket = s;
  53                 login = l;
  54         }
  55         
  56         public void hablar(){
  57                 JFrame marco = new JFrame(login);
  58                 marco.setLayout(new BorderLayout());
  59                 JTextArea areaTexto = new JTextArea("");
  60                 areaTexto.setEditable(false);
  61                 marco.add(areaTexto, "Center");
  62                 JPanel panel = new JPanel(new FlowLayout());
  63                 marco.add(panel, "South");
  64                 JTextField campoTexto = new JTextField(30);
  65                 panel.add(campoTexto);
  66                 JButton botonEnviar = new JButton("Enviar");
  67                 AccionEnviar ae = new AccionEnviar(socket, campoTexto, login);
  68                 botonEnviar.addActionListener(ae);
  69                 panel.add(botonEnviar);
  70                 marco.setSize(600,800);
  71                 marco.setVisible(true);
  72                 
  73                 BufferedReader entrada;
  74                 PrintStream salida;
  75                 try {
  76                         salida = new PrintStream(socket.getOutputStream());
  77                         salida.println(login + " se he conectado" );
  78                         
  79                         entrada = new BufferedReader(new InputStreamReader(socket.getInputStream()));
  80                         String mensaje;
  81                 while( (mensaje = entrada.readLine()) != null){
  82                             areaTexto.setText(areaTexto.getText() + mensaje + "\n");
  83                         }
  84                 } catch (IOException e) {
  85                         e.printStackTrace();
  86                 }
  87         }
  88 }
  89 
  90 public class Cliente {
  91         public static void main(String[] args)throws IOException {
  92                 String direccion = "localhost";
  93                 int puerto = 9999;
  94                 String login = "Nadie";
  95                 
  96                 if(args.length >= 1){
  97                         login = args[0];
  98                 }
  99                 if(args.length >= 2){
 100                         direccion = args[1];
 101                 }
 102                 if(args.length >= 3){
 103                         puerto = Integer.parseInt(args[2]);
 104                 }
 105                 Socket socket = new Socket(direccion, puerto);
 106                 
 107                 Talk talk = new Talk(socket, login);
 108                 talk.hablar();
 109         
 110                 socket.close();
 111                 System.exit(0);
 112         }
 113 
 114 }