Creating a Custom event for my Component

Hi All,
im currently working in a swing component, and i would like to know how to give to my component the ability to react to some user changes.
Basically im creating a DateTime Picker using NetBeans, im able to see any new property justed created on the Property Editor but i would like to know how to add my custom events on the Event Editor as well, i.e:
monthChanged - (when the user just change the month dropdown)
yearChanged - (when the user just change the year box)
dayChanged - (when the user just change the selection day)
Thanks in advance

Thanks, i just found it also here:
http://www.exampledepot.com/egs/java.util/CustEvent.html
i need to define the following class:
- Custom Listener extending the EventListener interface
- Custom Event extending EventObject class
and then finally add the corresponding:
addXXXListener
removeXXXListener
fireXXXEvent
in my component.
This work Great in the NetBeans GUI Builder.
Thanks,

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