[JAVA][예제] Daytime 프로토콜 예제 - Beginning Java Networking

 

 

Beginning Java Networking

Chad Darby, www.wrox.com

표준 인터넷 프로토콜을 이용한 클라이언트 예제

// DaytimeClient

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

public class DaytimeClient
{
  public static void main(String[] args)
  {
    String sHostName;

    // Get the name of the server from the command line.
    // No entry, use tock.usno.navy.mil
    if (args.length > 0)
    {
      sHostName = args[0];
    }
    else
    {
      sHostName = "tock.usno.navy.mil";
    }

    try
    {
      // Open a socket to Port 13.
      // Prepare to receive the Daytime information.
      Socket oSocket = new Socket(sHostName, 13);
      InputStream oTimeStream = oSocket.getInputStream();
      StringBuffer oTime = new StringBuffer();

      int iCharacter;

      // Fetch the Daytime information.
      while ((iCharacter = oTimeStream.read()) != -1)
      {
        oTime.append((char) iCharacter);
      }

      // Convert Daytime to a string and output.
      String sTime = oTime.toString().trim();
      System.out.println("It is " + sTime + " at " + sHostName + ".");

	// Close the stream and the socket.
	oTimeStream.close();
	oSocket.close();
    }

    catch(UnknownHostException e)
    {
      System.err.println(e);
    }

    catch(IOException e)
    {
      System.err.println(e);
    }
  }
}