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答：Server 端程序:

package test;

import java.net.*;

import java.io.*;

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public class Server{

private ServerSocket ss;

private Socket socket;

private BufferedReader in;

private PrintWriter out;

public Server(){

try {

ss=new ServerSocket(10000);

while(true){

socket = ss.accept();

String RemoteIP =

socket.getInetAddress().getHostAddress();

String RemotePort = “:”+socket.getLocalPort();

System.out.println(“A client come in!IP:”

+ RemoteIP+RemotePort);

in = new BufferedReader(new

InputStreamReader(socket.getInputStream()));

String line = in.readLine();

System.out.println(“Cleint send is :” + line);

out =

new PrintWriter(socket.getOutputStream(),true);

out.println(“Your Message Received!”);

out.close();

in.close();

socket.close();

}

}catch (IOException e){

out.println(“wrong”);

}

}

public static void main(String[] args){

new Server();

}

}

Client 端程序:

package test;

import java.io.*;

import java.net.*;

public class Client {

Socket socket;

BufferedReader in;

PrintWriter out;

public Client(){

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try {

System.out.println(“Try to Connect to

127.0.0.1:10000″);

socket = new Socket(“127.0.0.1″,10000);

System.out.println(“The Server Connected!”);

System.out.println(“Please enter some Character:”);

BufferedReader line = new BufferedReader(new

InputStreamReader(System.in));

out = new PrintWriter(socket.getOutputStream(),true);

out.println(line.readLine());

in = new BufferedReader(

new InputStreamReader(socket.getInputStream()));

System.out.println(in.readLine());

out.close();

in.close();

socket.close();

}catch(IOException e){

out.println(“Wrong”);

}

}

public static void main(String[] args) {

new Client();

}

}

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