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Tip of the Day
Language: Java
Expertise: Intermediate
Oct 16, 1998



Application Security Testing: An Integral Part of DevOps

Network Programming, TCP/IP Client, Get The Time

With Java, it's easy to write a client program that connects to a TCP/IP server to get the date and time. This is very useful for network testing.

Insert your favorite Web server name into the String named server. The program should then display the date and time at the server. However, be aware that your favorite server may not cooperate and you may need to tray another server:

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

class SocketTime01{
	public static void main(String[] args){
		String server = "www.yourFavoriteServer.com";
		int port = 13; //daytime port

			Socket socket = new Socket(server,port);//get socket

		BufferedReader inputStream = 
					new BufferedReader(new InputStreamReader(
			//Get an input stream from the socket

		System.out.println(inputStream.readLine() +
					" at " + server);//receive and display

		}//end try
		catch(UnknownHostException e){
					"Connection Failure. Are you online?");
		}//end catch UnknownHostException
		catch(IOException e){System.out.println(e);}
	}//end main
}//end class SocketTime01
Richard G.
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