Class TimeTCPClient

java.lang.Object
org.apache.commons.net.SocketClient
org.apache.commons.net.time.TimeTCPClient

public final class TimeTCPClient extends SocketClient
The TimeTCPClient class is a TCP implementation of a client for the Time protocol described in RFC 868. To use the class, merely establish a connection with connect and call either getTime() or getDate() to retrieve the time, then call disconnect to close the connection properly.
See Also:
  • Field Details

    • DEFAULT_PORT

      public static final int DEFAULT_PORT
      The default time port. It is set to 37 according to RFC 868.
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    • SECONDS_1900_TO_1970

      public static final long SECONDS_1900_TO_1970
      The number of seconds between 00:00 1 January 1900 and 00:00 1 January 1970. This value can be useful for converting time values to other formats.
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  • Constructor Details

    • TimeTCPClient

      public TimeTCPClient()
      The default TimeTCPClient constructor. It merely sets the default port to DEFAULT_PORT.
  • Method Details

    • getDate

      public Date getDate() throws IOException
      Retrieves the time from the server and returns a Java Date containing the time converted to the local time zone.

      The server will have closed the connection at this point, so you should call disconnect after calling this method. To retrieve another time, you must initiate another connection with connect before calling getDate() again.

      Returns:
      A Date value containing the time retrieved from the server converted to the local time zone.
      Throws:
      IOException - If an error occurs while fetching the time.
    • getTime

      public long getTime() throws IOException
      Retrieves the time from the server and returns it. The time is the number of seconds since 00:00 (midnight) 1 January 1900 GMT, as specified by RFC 868. This method reads the raw 32-bit big-endian unsigned integer from the server, converts it to a Java long, and returns the value.

      The server will have closed the connection at this point, so you should call disconnect after calling this method. To retrieve another time, you must initiate another connection with connect before calling getTime() again.

      Returns:
      The time value retrieved from the server.
      Throws:
      IOException - If an error occurs while fetching the time.