用JAVA编写一个socket通信程序。

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {

    public static void main(String[] args) {
        ServerSocket ss;
        Socket s;
        try {
            ss = new ServerSocket(8888);
            s = ss.accept();
            InputStreamReader isr = new InputStreamReader(s.getInputStream());
            BufferedReader br = new BufferedReader(isr);
            
            System.out.println(br.readLine());
            br.close();
            isr.close();
            
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        

    }

}

import java.io.PrintWriter;
import java.net.Socket;


public class Client {

    public static void main(String[] args) {
        
        try {
            Socket s = new Socket("127.0.0.1", 8888);
            
            PrintWriter pw = new PrintWriter(s.getOutputStream());
            pw.write("hello server");
            pw.flush();
            
            pw.close();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}

端口监听和建立管道。首先服务器端绑定监听端口，然后客户端socket连接到这个端口，控制台输入的字符串都会被在这个端口监听的服务器接收到。