I want to ask a server, whose IP I know, to send the date and time to a client.
How can I implement this in Java?
@John Weldon: The updated question is much clearer, but unless Mr. jinguy can read lightux's mind, I would say that's completely a different question. I think the former ( while not clear ) was about to see what connections have been made to a server. I guess we will never know
OscarRyz
2010-02-03 15:52:37
Actually, I didn't look to see who made the edits. I didn't think that the updated question reflected the original question, but I guess it's up to the OP to clarify.. Thanks @Oscar.
John Weldon
2010-02-03 16:00:19
+2
A:
Your question is not clear so I'll post a number of possible answers.
If the server exists and have a protocol to answer your request
- A1. Create a program ( probably using Sockets ) to query that server.
If the server exists but doesn't have a protocol to answer your request and YOU own that server and already logs ...which IP has been known to respond the date and time
- A2. Read those logs in the server ( probably using InputStreamReader ) Create the protocol answer the request ( Socket ) and then go to A1.
If the server exists but doesn't have a protocol to answer your request and you own that server and doesn't logs ...which IP has been known to respond the date and time
- A3. Forget it
If The server exists but doesn't have a protocol to answer your request and you DON'T own that server.
- A4. Go to A3
If the server doesn't exists and you can create it.
- A5 Create the server code and then go to A2
If the server doesn't exist and you cannot create it
- A6 Go to A3
... And so on.
OscarRyz
2010-02-03 15:38:31
+1
A:
Article describing the details: http://www.informit.com/articles/article.aspx?p=26316&seqNum=3
client http://commons.apache.org/net/apidocs/org/apache/commons/net/ntp/NTPUDPClient.html
Kennet
2010-02-03 16:01:06