java Connection reset错误找了很久不知道错在哪里，求大神告知

Question

import java.io.*;
import java.net.*;   
import java.util.*;   
public class Server {  
	  public static ArrayList<ServerThread> list=new ArrayList<ServerThread>();
	  public static int clientnum=0;
	  public static void main(String[] args){
		  try {
				//创建一个服务器的Socket
				ServerSocket serverSocket=new ServerSocket(8888);
				Socket socket=null;
				System.out.println("*****服务器即将启动，等待客户端链接*****");
				DataInputStream dis;
				DataOutputStream dos;
				while(true){
					//调用accept()方法开始监听，等待客户端的链接
					socket=serverSocket.accept();
					dis=new DataInputStream(socket.getInputStream());
					dos=new DataOutputStream(socket.getOutputStream());

					
					//创建线程
					ServerThread thread=new ServerThread(dis,dos,clientnum);
					thread.start();
					list.add(thread);
					clientnum++;
				}

				
			} catch (IOException e) {
				e.printStackTrace();
			}
	  }
}


import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;  
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;  
import java.util.ArrayList;
import java.util.List;
import java.net.*;

		/*
		  * 服务器线程的作用主要是:
		  *   1.接收来自客户端的信息 
		  *   2.将接收到的信息解析，并转发给目标客户端 
		  * */  
public class ServerThread extends Thread {
	public static String[] name=new String[10];
	int id;
	DataInputStream dis;
	DataOutputStream dos;
	

	    public ServerThread(DataInputStream dis,DataOutputStream dos,int num){
	    	this.dis=dis;
	    	this.dos=dos;
	        this.id = num;  
	    }  
	
	    public void run() {  
	        while(true){
	        	try{
	        		String masg=dis.readUTF();
	        		for(int i=0;i<Server.clientnum;i++){
	        			Server.list.get(i).dos.writeUTF(masg);
	        			dos.flush();
	        		}
	        	}catch(IOException e){
	        		e.printStackTrace(); 
	        	}
	        }
	    } 
}  

import java.io.*;   
import java.net.*;  
import java.util.ArrayList;
import javax.swing.*;

	public class Client {
		public static void main(String[] args) {  
	        try { 
		        	Socket socket = new Socket("localhost", 8888);
		        	DataInputStream dis=new DataInputStream(socket.getInputStream());
		        	DataOutputStream dos=new DataOutputStream(socket.getOutputStream());
				
		            Load load=new Load(dos);
		            load.setVisible(true);
		            
		            ClientThread thread=new ClientThread(dis,load.getChat().getta());
		            thread.start();
	            //开启一个线程接收信息，并解析  
	            
	            //thread.start();
	            //主线程用来发送信息
	        }catch(Exception e){  
	            System.out.println("服务器异常");  
	        }  
	    }  
	}  	

import java.io.*;  

import java.net.*;  

import java.util.ArrayList;

import javax.swing.*;

import java.awt.*;

/** 

*   作用：一直接收服务端转发过来的信息 

* */  

public class ClientThread extends Thread {  

DataInputStream dis;  

   JTextArea ta;

   public ClientThread(DataInputStream dis,JTextArea ta){  

    this.dis = dis;  

    this.ta=ta;

    //this.start();

   }  

  

  public void run() {

  String masg=null;

  while(true){

  try { 

  masg=dis.readUTF();

  ta.append(masg);

       }catch(IOException e1) {  

            e1.printStackTrace();  

        }  

  }

       

   }  

}  

class MyListener implements ActionListener,KeyListener {

public void actionPerformed(ActionEvent e) {

String s = "";

Date d=new Date();

   SimpleDateFormat sj=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

if(e.getActionCommand()=="牛头梗"){

me.setText(s+"To:"+e.getActionCommand());

dxname="牛头梗";

masg=sj.format(d)+"\n"+s+"对"+dxname+"说："+tf1.getText();

}else if(e.getActionCommand()=="中华田园犬"){

me.setText(s+"To:"+e.getActionCommand());

dxname="中华田园犬";

masg=sj.format(d)+"\n"+s+"对"+dxname+"说："+tf1.getText();

}else if(e.getActionCommand()=="东北二哈"){

me.setText(s+"To:"+e.getActionCommand());

dxname="东北二哈";

masg=sj.format(d)+"\n"+s+"对"+dxname+"说："+tf1.getText();

}else if(e.getActionCommand()=="发送") {

s1=sj.format(d)+"\n"+s+jc1.getSelectedItem()+"的对"+dxname+"说："+tf1.getText()+"\n";

ta1.append(s1);//tf1.getText()获取输入框的文字将其输入到ta1留言框中

tf1.setText (null);

try{

dos.writeUTF(masg);

dos.flush();

}catch(IOException e1) {  

            e1.printStackTrace();  

        } 

}

}

@Override

public void keyPressed(KeyEvent a) {

// TODO Auto-generated method stub

String s= "";

int key=a.getKeyCode();

if(key==10) {

Date d=new Date();

   SimpleDateFormat sj=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

   

s=sj.format(d)+"\n"+jc1.getSelectedItem()+"地说:"+tf1.getText()+"\n";

ta1.append(s);//tf1.getText()获取输入框的文字将其输入到ta1留言框中

tf1.setText (null);

}

}

public void keyReleased(KeyEvent arg0) {

}

public void keyTyped(KeyEvent arg0) {

}

}