Format date with vaadin

I work with eclipse Version: 3.6.2 and Vaadin Plug-in for Eclipse 2.0.1

I want to display the first date and the last date of week in form “day1 month1 - day2 month2 year”
(for exemple : this week the first date is 17 oct. 2011 and the last is 22 oct. 2011 ==> "17 oct. - 22 oct. 2011 ")

Could you help me, please?

This looks more like a task for standard Java than for Vaadin, unless you omitted some information. You might be looking for
(something I am using just right now!).
If I just state the obvious, perhaps you should provide more context.

Thank you -_-