138、Java 的通信编程，编程题(或问答)，用JAVA SOCKET编程，读服务器几个字符，再写入本地显示？

答：Server端程序：

package test;
import java.net.*;
import java.io.*;

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() {
  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();
 }
}