Server:

package cn.itcast.framework.socket;import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;//用JAVA SOCKET编程，读服务器几个字符，再写入本地显示？ 
//Server端程序:
public class Server {private ServerSocket serverSocket;private Socket socket;private BufferedReader in;private PrintWriter out;public Server(){try {serverSocket = new ServerSocket(10000);while(true){socket = serverSocket.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("Client 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:

package cn.itcast.framework.socket;import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;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();}
}