If the print-function is not enough for you, then you can use the logger Object to log Commands, information warnings and more.

Accessing the Logging Handler

Link to accessing-the-logging-handler

You can access the Formatting Handler using the logger global keyword.

  • logCommand(String message);
  • logInfo(String message);
  • logWarning(String message);
  • logError(String message);

Accessible, but useless Methods

Link to accessible-but-useless-methods

  • logError(String message, Throwable exception);
  • logPlayer(IPlayer player);

You can not use Java's throwables so the first Method is useless.
The second Method does absolutely nothing. Literally, the implementation is empty!