java 5/10

SERVER 程式碼

import java.net.*;
import java.io.*;
public class SimpleServer {
   public final static int myPort=20; // 使用port 20
   public static void main(String args[]) {
      //ServerSocket ss;
      //Socket sc;
      PrintWriter op;

  try {

         ServerSocket ss= new ServerSocket(myPort);
while (true) {
Socket sc = ss.accept(); // 等待建立連線
                op = new PrintWriter(sc.getOutputStream());
       op.println("Hi! There!");
                op.flush(); // 很重要, 不要漏掉
                sc.close();

}
}
  catch (IOException e) {
System.err.println(e);
}
     System.out.println("end");
/*

try {
  ss = new ServerSocket(myPort);
  try {
    while (true) {
sc = ss.accept(); // 等待建立連線
op = new PrintWriter(sc.getOutputStream());
op.println("Hi! There!");
op.flush(); // 很重要, 不要漏掉
sc.close();
}
  }
  catch (IOException e) {
ss.close();
System.err.println(e);
}
}
catch (IOException e) {
System.err.println(e);
}

*/
}
}

client 程式碼


import java.net.*;
import java.io.*;

// Chapter 6, Listing 1
public class clinet {
  public static final int SERVICE_PORT = 20;

  public static void main(String args[]) {
    // Check for hostname parameter
    if (args.length != 1) {
      System.out.println ("Syntax - DaytimeClient host");
      return;
    }

    // Get the hostname of server
    String hostname = args[0];

    try {
      // Get a socket to the daytime service
      Socket daytime = new Socket (hostname, SERVICE_PORT);

      System.out.println ("Connection established");

      // Set the socket option just in case server stalls
      daytime.setSoTimeout ( 2000 );

      // Read from the server
      BufferedReader reader = new BufferedReader (
      new InputStreamReader(daytime.getInputStream()));

      System.out.println ("Results : " + reader.readLine());

      // Close the connection
      daytime.close();
    } catch (IOException ioe) {
      System.err.println ("Error " + ioe);
    }
  }
}



各一個 SERVER
            CLIENT   對連\

一個SERVER 兩個CLIENT