práctica tcp 1/2

TCPCliente.java

import java.io.*;
import java.net.*;

class TCPCliente {
	public static void main(String args[]) throws Exception {
		String frase = null;
		String respuesta;
		String server;
		Integer port;

		try {
			frase = args[0];
		} catch(ArrayIndexOutOfBoundsException e) {
			System.out.println("Frase no introducida");
		}

		try {
			server = args[1];
		} catch(ArrayIndexOutOfBoundsException e) {
			server = "127.0.0.1";
		}

		try {
			port = Integer.parseInt(args[2]);
		} catch(ArrayIndexOutOfBoundsException e) {
			port = 2510;
		} catch(NumberFormatException e) {
			port = 2510;
		}

		if(frase != null) {
			try {
				Socket socketCliente = new Socket(server, port);

				BufferedReader entradaDesdeServidor = new BufferedReader(new InputStreamReader(socketCliente.getInputStream()));
				DataOutputStream salidaServidor = new DataOutputStream(socketCliente.getOutputStream());

				salidaServidor.writeBytes(frase + '\n');
				respuesta = entradaDesdeServidor.readLine();

				System.out.println("Hemos recibido: " + respuesta);

				socketCliente.close();
			} catch (ConnectException e) {
				System.out.println("Servidor no encendido");
			}
		}
	}
}

TCPServidor.java

import java.io.*;
import java.net.*;

class TCPServidor {
	public static void main(String args[]) throws Exception {
		Integer port;
		
		try {
			port = Integer.parseInt(args[0]);
		} catch(ArrayIndexOutOfBoundsException e) {
			port = 2510;
		} catch(NumberFormatException e) {
			port = 2510;
		}

		ServerSocket socketAtendido = new ServerSocket(port);

		while(true) {
			Socket socketConexion = socketAtendido.accept();
			BufferedReader entradaDesdeCliente = new BufferedReader(new InputStreamReader(socketConexion.getInputStream()));
			DataOutputStream salidaACliente = new DataOutputStream(socketConexion.getOutputStream());
			
			System.out.println(socketConexion.getInetAddress().getHostAddress() + ' ' + socketConexion.getPort());
			
			salidaACliente.writeBytes(entradaDesdeCliente.readLine() + '\n');
		}
	}
}