求助高手，一道难题，谢谢，急，后天考试

[ctrruby]

编写一个客户/服务器程序qmj，服务器端的功能是计算圆的面积。客户端将圆的半径发送给服务器端，服务器端计算得出的圆面积将发送给客户端，并在客户端显示。

我写的程序，好像不能把数据，送到服务器，哪里错了，求教了，谢谢

客户端部分
import java.io.*;import java.net.*;
public class client {
public static void main(String args[]){
Socket mySocket;BufferedReader br;
DataInputStream in=null;
DataOutputStream out=null;
String s=null;
try{mySocket=new Socket("127.0.0.1",4555);
in=new DataInputStream(mySocket.getInputStream());
out=new DataOutputStream(mySocket.getOutputStream());
br=new BufferedReader(new InputStreamReader(System.in));
System.out.println("请输入半径：");
String s1=null;
s1=in.readUTF();
System.out.println("面积="+s1);
while(true){
s=br.readLine();
System.out.println("你输入的半径为：");

out.writeUTF(s);}

}
catch(IOException e){System.out.println("无法连接");}
}}

服务器端部分
import java.io.*;
import java.net.*;
public class sever {
public static void main(String args[]){
ServerSocket server=null;
Socket you=null;String s2=null;int r;
DataInputStream in=null;
DataOutputStream out=null;
try{server=new ServerSocket(4555);}
catch(IOException e1)
{System.out.println("error"+e1);}
try{ you=server.accept();
in=new DataInputStream(you.getInputStream());
out=new DataOutputStream(you.getOutputStream());
while(true){
s2=in.readUTF();
if(s2.equals("/r"))//如果等于回车/r，请问我这样判断字符串输入结束对吗。
break;
r=Integer.parseInt(s2);
String s3=String.valueOf(3.14*r*r);
out.writeUTF(s3);
System.out.println("面积="+s3);
}}catch(IOException e){
System.out.println("error"+e);}
}




}

[ctrruby]

希望高手，最好可以帮我把哪里错了，改好谢谢，实在找不到，刚接触，谢谢

[magong]

[Quote=引用楼主 ctrruby 的回复:]
if(s2.equals("/r"))//如果等于回车/r，请问我这样判断字符串输入结束对吗。
[/Quote]
这肯定不对。
改用BufferedReader好了，可以readLine()

[ctrruby]

请问楼上的朋友是哪一句要改，谢谢，具体点，谢谢

[chinalwb]

Server:

import java.io.*;
import java.net.*;
public class Server {
public static void main(String args[]){

ServerSocket server=null;
Socket you=null;String s2=null;int r;

DataInputStream in=null;
DataOutputStream out=null;

try{
	server=new ServerSocket(4555);
}
catch(IOException e1)
{System.out.println("error"+e1);}

while (true) {
try{ 
you=server.accept();
System.out.println("New connection arrived: " + you.getPort());
BufferedReader br = new BufferedReader(new InputStreamReader(you.getInputStream()));
PrintWriter pw = new PrintWriter(you.getOutputStream(), true);

String msg = null;
while ((msg = br.readLine()) != null) {
	System.out.println("msg = " + msg);
	double d = Double.parseDouble(msg);
	double area = 3.14 * d * d;
	System.out.println("area is : " + area);
	
	pw.println(area);
}

}catch(IOException e){
System.out.println("error"+e);}
}

}
}

[chinalwb]

Client:

import java.io.*;import java.net.*;
public class Client {
public static void main(String args[]){
  Socket mySocket;
  PrintWriter pw;
  BufferedReader br;
  BufferedReader localReader;
  InputStream in=null;
  OutputStream out=null;
  String s=null;
  try{
	mySocket=new Socket("127.0.0.1",4555);
	
	br = new BufferedReader(new InputStreamReader(mySocket.getInputStream()));
	pw = new PrintWriter(mySocket.getOutputStream(), true);
	
    localReader =new BufferedReader(new InputStreamReader(System.in));
	
    System.out.println("Please type in radius: ");
    while((s=localReader.readLine()) != null){
	  System.out.println("The radius you input is " + s);
  
      pw.println(s);
	  System.out.println(br.readLine());
    }
  
  }
  catch(IOException e){System.out.println("Cannot connect to Server!");}
}}

[chinalwb]

加上退出的关键字：bye

Client ：

while((s=localReader.readLine()) != null){
if (s.equals("bye")) break;
System.out.println("The radius you input is " + s);


Server:

while ((msg = br.readLine()) != null) {
if (msg.trim().equals("bye")) break;

[ctrruby]

先谢谢楼上的这位朋友了。我去运行看看，多谢，

[chinalwb]

Lemme know your further issues.