Clock help

I am very new to Netbeans and java programming in general so excuse my ignorance, but i am trying to implement a simple digital clock via a Jlabel but when i attempt to add a TimerBean it says "Components from the default package cannot be used outside of the default pakage" what does this mean? and more importantly how can i implement this clock ( as a basic decktop aplication ).

Thankyou for any help.