Time synchronization between server and Internet using Java

I have an assign开发者_StackOverflow中文版ment for developing a messenger for 1 server and 3 clients. I am facing a problem with time synchronization: I have to synchronize the server time with the internet and then synchronize the clients also. How can I accomplish this?

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Use NTP to synchronize the different clocks. You'll want an NTP library, perhaps this one.

See also

• Java NTP client
• Network Time Synchronization with Java
• Using Java to Query a Server for the Time