Simple IRC Client in Java

IrcSenderSimple.java

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

class IrcSenderSimple {
  static void sendString(BufferedWriter bw, String str) {
    try {
      bw.write(str + "\r\n");
      bw.flush();
    }
    catch (Exception e) {
      System.out.println("Exception: "+e);
    }
  }
  public static void main(String args[]) {
    try {

      String server   = "chat1.ustream.tv";
      int port        = 6667;
      String nickname = "ustreamer-183999bot";
      String channel  = "#bot-test-ch";
      String message  = "hi, all";

      Socket socket = new Socket(server,port);
      System.out.println("*** Connected to server.");
      OutputStreamWriter outputStreamWriter = new OutputStreamWriter(socket.getOutputStream());
      System.out.println("*** Opened OutputStreamWriter.");
      BufferedWriter bwriter = new BufferedWriter(outputStreamWriter);
      System.out.println("*** Opened BufferedWriter.");

      sendString(bwriter,"NICK "+nickname);
      sendString(bwriter,"USER chatterBot  8 * :chatterBot 0.0.1 Java IRC Bot - www.chat.org");
      sendString(bwriter,"JOIN "+channel);
      /*
      // サーバーからの応答確認
      InputStreamReader inputStreamReader = new InputStreamReader(socket.getInputStream());
      BufferedReader breader = new BufferedReader(inputStreamReader);
      String line = null;
      int tries = 1;
      while ((line = breader.readLine()) != null) {
        System.out.println(">>> "+line);

        int firstSpace = line.indexOf(" ");
        int secondSpace = line.indexOf(" ", firstSpace + 1);
        if (secondSpace >= 0) {
          String code = line.substring(firstSpace+1, secondSpace);
          if (code.equals("004")) {
            break;
          }
        }
      }
    */
      sendString(bwriter,"PRIVMSG "+channel+" :"+message);

      bwriter.close();
    }catch (Exception e) {
      e.printStackTrace();
    }
  }
}