自己编写的NIO非阻塞聊天室

最近学习了非阻塞IO（NIO），因为厌烦了在开发并行处理时候，阻塞IO所导致的肥服务端，因为对于每个客户连接都要产生一个线程对此进行处理，当然你可以不这样实现，但我的前提是开发并行处理，下面是我的源码，因为是在dos命令行测试的，所以要是编写为GUI的时候，还要很多要改的东西，这也是我下个征服的对象，当然我已经迫不及待了，下面是我花了三个晚上学习并编写的非阻塞聊天室：(供交流学习用)

客户端：
import Java.net.InetSocketAddress;
import java.nio.channels.SocketChannel;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.io.BufferedReader;
import java.io.*;
import java.lang.Thread;
import java.nio.charset.*;
import java.nio.charset.CharsetDecoder;

public class ChatClient{

private InetSocketAddress address = new InetSocketAddress("localhost",13);
private SocketChannel client = null;
private String user = null;
private String pass = null;
private BufferedReader in = null;
private Thread t = null;

public ChatClient(){
try{
client = SocketChannel.open();
System.out.println("connecting...");

client.connect(address);
System.out.println("connected with " address.getHostName());
client.configureBlocking(false);
}catch(IOException ex){
ex.printStackTrace();
System.exit(-1);
}
this.start();
}

public void start(){
this.receiveMessage();
this.sendMessage();
}

public void sendMessage(){
try{
in = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Input the Info then check it out on the server");
System.out.print("Your Name:");
user = in.readLine();
System.out.println("Password:");
pass = in.readLine();

ByteBuffer buffer = ByteBuffer.allocate(50);
String message= new String("LOGIN:" user "&" pass);
buffer = ByteBuffer.wrap(message.getBytes());
while(buffer.hasRemaining()&client.write(buffer)!=-1);
System.out.println(message " has been send");


buffer.flip();
Charset charset = Charset.forName("gb2312");
CharsetDecoder decoder = charset.newDecoder();
CharBuffer charBuffer = decoder.decode(buffer);
//System.out.println("receive:" charBuffer " length:" charBuffer.limit());
}catch(IOException ex){
ex.printStackTrace();
}

this.waitFor(2000);

System.out.println("WELCOME TO THE KING 'S CHAT ROOM!");
System.out.println("Input the Info(exit is to leave out)");
while(true){
System.out.print(">");

ByteBuffer buffer = ByteBuffer.allocate(100);
in = new BufferedReader(new InputStreamReader(System.in));
try{
String read=in.readLine();
if(read.equals("exit")){
break;
}
String message1="SENTO:" read;
buffer = ByteBuffer.wrap(message1.getBytes());
// buffer.flip();
System.out.println("before");
while(buffer.hasRemaining()&client.write(buffer)!=-1);
// buffer.flip();
System.out.println(message1 " has been send");
this.waitFor(500);
}catch(IOException ex){
ex.printStackTrace();
}
}

System.out.println("Welcome to use this soft!---King");
System.exit(-1);

}

public void waitFor(long time){
try{
Thread.sleep(time);
}catch(Exception ex){
ex.printStackTrace();
}
}

public void receiveMessage(){
t=new ReceiveThread(client);
t.start();
}

public static void main(String[]args){
ChatClient cc=new ChatClient();

}

class ReceiveThread extends Thread{
SocketChannel client =null;
ByteBuffer buffer=ByteBuffer.allocate(50);
private boolean val=true;

public ReceiveThread(SocketChannel client){
this.client = client;
}

public void run(){
while(val){
try{
while (client.read(buffer) > 0){
buffer.flip();
String result = decode(buffer);
System.out.println(">(back)" result);
buffer.flip();
}
}catch(IOException ex){
ex.printStackTrace();
return;
}

}
}
}

public String decode(ByteBuffer buffer){
Charset charset=null;
CharsetDecoder decoder=null;
CharBuffer charBuffer=null;

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