关于TCP/IP通信的程序错误
不要用API来糊弄我，我要的是能够解决问题的答案

服务器代码
import java.net.*;
import java.io.*;
public class serverTCP
{
public static void main(String[] args)
{
try{
ServerSocket serversocket=new ServerSocket(2000);
Socket socket=serversocket.accept();
BufferedReader buffer=new BufferedReader(new InputStreamReader(socket.getInputStream()));
String s=buffer.readLine();
System.out.print(s);
socket.close();
}catch(SocketException e){e.printStackTrace();}
catch(IOException e1){e1.printStackTrace();}
catch(UnknownHostException e2){e2.printStackTrace();}
}
}


客户端代码
import java.net.*;
import java.io.*;
public class clientTCP
{
public static void main(String[] args)
{
try{
Socket socket=new Socket(InetAddress.getByName("localhost"),2000);
PrintWriter out=new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())),true);
out.print("我向你发送了一个连接请求,你收到了吗");
}catch(SocketException e){e.printStackTrace();}
catch(IOException e1){e1.printStackTrace();}
}
}

错误：
当我运行客户端代码时会向服务器端发送一个字符串；
这时服务器端程序出现异常错误：
这是怎么回事，是我没有捕捉异常吗。
我应该怎么修改服务器端的代码：？

不要用API来糊弄我，我要的是能够解决问题的答案

[解决办法]

Java code

import java.net.*;import java.io.*;public class serverTCP {    public static void main(String[] args) {                ServerSocket serversocket = null;        Socket socket = null;        BufferedReader buffer = null;                try {                        serversocket  = new ServerSocket(2000);                        socket = serversocket.accept();                        buffer = new BufferedReader(new InputStreamReader(                    socket.getInputStream()));                        String s = buffer.readLine();                        System.out.print(s);                        buffer.close();            socket.close();        } catch (SocketException e) {            e.printStackTrace();        } catch (IOException e1) {            e1.printStackTrace();        } finally {            try {                buffer.close();                socket.close();                serversocket.close();            } catch (IOException e) {                // TODO 自动生成 catch 块                e.printStackTrace();            }            }    }}