Using Java to Query a Server for the Time

Question

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?

Answer 1

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.