请大侠帮我改改这个程序

[dyfanyi]

我自己做了一个小聊天室，用的APPLET，但是不知道怎么传参数进去。。。请大侠帮忙改改，20分。。。
chatServer文件：

import java.net.*;
import java.io.*;
public class chatServer implements Runnable{
public static final int PORT=1234;
protected ServerSocket listen;
Thread connect;
clientThread cThread[]=new clientThread[5];
int num=0;


public chatServer() {
try{
listen=new ServerSocket(PORT);
}
catch(UnknownHostException e){}
catch(IOException e2){}
connect=new Thread(this);
connect.start();
}
public void run() {
try {
while(true) {
Socket client=listen.accept();
cThread[num]=new clientThread(this,client);
cThread[num].start();
num++;
}
}
catch(IOException e){}
}

public void broadcast(String msg) {
for(int i=0;i<num;i++) {
try {
cThread[i].out.writeUTF(msg);
}
catch(IOException e) {}
}
}

public static void main(String args[]) {
new chatServer();
System.out.println("Chat Server is starting!.....");
}
}
class clientThread extends Thread {
protected Socket client;
protected DataOutputStream out;
protected DataInputStream in;
protected chatServer server;

public clientThread(chatServer server,Socket client) {
this.server=server;
this.client=client;
try{
in=new DataInputStream(client.getInputStream());
out=new DataOutputStream(client.getOutputStream());
}
catch(IOException e) {}
}
public void run() {
try{
while(true) {
server.broadcast(in.readUTF());
}
}
catch(IOException e) {}
}
}
客户端文件：

import java.net.*;
import java.io.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.applet.*;
//import java.awt.Panel;
class Spanel extends Panel{
TextField msg_txt;
JButton button;
Spanel(){
setLayout(new FlowLayout());
msg_txt=new TextField(20);
button=new JButton("送出");

add(new JLabel("你说的话"));
add(msg_txt);
add(button);

}
}

public class chatClient extends Applet implements Runnable,ActionListener{
public static final int PORT=1234;
String name;
Socket socket;
DataOutputStream out;
DataInputStream in;
Thread thread;
TextArea chat_txt;
Spanel sp;

public void init(){
setBackground(new Color(230,230,200));
setLayout(new BorderLayout());

name=getParameter("Chatname");
chat_txt=new TextArea(10,45);
chat_txt.setEditable(false);
Spanel sp=new Spanel();
add("Center",chat_txt);add("South",sp);
sp.button.addActionListener(this);
chat_txt.setBackground(new Color(200,185,220));
}

public void start(){
try{
socket=new Socket(this.getCodeBase().getHost(),PORT);
in=new DataInputStream(socket.getInputStream());
out=new DataOutputStream(socket.getOutputStream());
}
catch(IOException e){}
chat_txt.append("★★★"+" "+name+",欢迎你来到聊天室 "+"★★★\n");
if(thread==null){
thread=new Thread(this);
thread.start();
}
}
public void run(){
try{
while(true){
chat_txt.append(in.readUTF()+'\n');
}
}
catch(IOException e){}
}

public void actionPerformed(ActionEvent e){
if((name!=null)){
try{
out.writeUTF(name+"说→"+":"+sp.msg_txt.getText());
sp.msg_txt.setText(null);
}
catch(IOException e1){}
}
}
public static void main(String args[]){
new Spanel();
new chatClient();
}
}

[捏造的信仰]

楼主我教你怎么贴代码：
1、将代码进行良好的格式化，以方便阅读。
2、在发帖文本框的上方单击“#”按钮，选择 Java
3、将代码粘贴到【code=Java】和【/code】之间。发出来的帖子就会是下面的效果：

public class Hello {

    // 程序入口
    public static void main(String[] args) {
        System.out.println("Hello!");
    }
}

[wangie]

import java.net.*; 
import java.io.*; 
public class chatServer implements Runnable{ 
public static final int PORT=1234; 
protected ServerSocket listen; 
Thread connect; 
clientThread cThread[]=new clientThread[5]; 
int num=0; 


public chatServer()  { 
try{ 
listen=new ServerSocket(PORT); 
} 
catch(UnknownHostException e){} 
catch(IOException e2){} 
connect=new Thread(this); 
connect.start(); 
} 
public void run() { 
try { 
  while(true) { 
  Socket client=listen.accept(); 
  cThread[num]=new clientThread(this,client); 
  cThread[num].start(); 
  num++; 
    } 
  } 
catch(IOException e){} 
} 

public void broadcast(String msg) { 
  for(int i=0;i <num;i++) { 
  try { 
    cThread[i].out.writeUTF(msg); 
      } 
  catch(IOException e) {} 
  } 
} 

public static void main(String args[]) { 
  new chatServer(); 
  System.out.println("Chat Server is starting!....."); 
  } 
} 
class clientThread extends Thread { 
protected Socket client; 
protected DataOutputStream out; 
protected DataInputStream  in; 
protected chatServer server; 

public clientThread(chatServer server,Socket client) { 
  this.server=server; 
  this.client=client; 
    try{ 
    in=new DataInputStream(client.getInputStream()); 
    out=new DataOutputStream(client.getOutputStream()); 
  } 
catch(IOException e) {} 
} 
public void run() { 
  try{ 
  while(true) { 
  server.broadcast(in.readUTF()); 
} 
} 
catch(IOException e) {} 
} 
} 
客户端文件： 

import java.net.*; 
import java.io.*; 
import java.awt.*; 
import javax.swing.*; 
import java.awt.event.*; 
import java.applet.*; 
//import java.awt.Panel; 
class Spanel extends Panel{ 
TextField msg_txt; 
JButton button; 
Spanel(){ 
setLayout(new FlowLayout()); 
msg_txt=new TextField(20); 
button=new JButton("送出"); 

add(new JLabel("你说的话")); 
add(msg_txt); 
add(button); 

} 
} 

public class chatClient extends Applet implements Runnable,ActionListener{ 
public static final int PORT=1234; 
String name; 
Socket socket; 
DataOutputStream out; 
DataInputStream in; 
Thread thread; 
TextArea chat_txt; 
Spanel sp; 

public void init(){ 
setBackground(new Color(230,230,200)); 
setLayout(new BorderLayout()); 

name=getParameter("Chatname"); 
chat_txt=new TextArea(10,45); 
chat_txt.setEditable(false); 
Spanel sp=new Spanel(); 
add("Center",chat_txt);add("South",sp); 
sp.button.addActionListener(this); 
chat_txt.setBackground(new Color(200,185,220)); 
} 

public void start(){ 
try{ 
socket=new Socket(this.getCodeBase().getHost(),PORT); 
in=new DataInputStream(socket.getInputStream()); 
out=new DataOutputStream(socket.getOutputStream()); 
} 
catch(IOException e){} 
chat_txt.append("★★★"+" "+name+",欢迎你来到聊天室 "+"★★★\n"); 
if(thread==null){ 
thread=new Thread(this); 
thread.start(); 
} 
} 
public void run(){ 
try{ 
while(true){ 
chat_txt.append(in.readUTF()+'\n'); 
} 
} 
catch(IOException e){} 
} 

public void actionPerformed(ActionEvent e){ 
if((name!=null)){ 
try{ 
out.writeUTF(name+"说→"+":"+sp.msg_txt.getText()); 
sp.msg_txt.setText(null); 
} 
catch(IOException e1){} 
} 
} 
public static void main(String args[]){ 
new Spanel(); 
new chatClient(); 
} 
}