This week's book giveaway is in the General Computing forum. We're giving away four copies of Arduino in Action and have Martin Evans, Joshua Noble, and Jordan Hochenbaum on-line! See this thread for details.
You cannot pass data to a subclass anything. What it means is you are extending the class, and in the extended class (the subclass) you take day month year as parameters. In fact I think it would be better to put the date fields in the superclass (all Employess have a date of birth) and use
super(day, month, year, name, etc); in the subclass constructor.