getdaytime.java

Java程序设计技巧与开发实例附书源代码。

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

public class GetDayTime
{  public static void main(String args[])
   {  String host = args[0];
      try
      {  Socket connection = new Socket(host, 13);
         System.out.println("Connection established:");
         BufferedReader in = new BufferedReader(
                                new InputStreamReader(
                                   connection.getInputStream()));
         String daytime = in.readLine();
         System.out.println("DayTime received: " + daytime);
         connection.close();
      }
      catch(UnknownHostException uhe)
      {  System.err.println("Host not found: " + uhe); }
      catch(IOException ioe)
      {  System.err.println("Error: " + ioe); }
   }
}