It's possible with vaadin?

Hi all, I am very new to vaadin and would like to make an inquiry and whether it is possible to vaadin do the following:
For example, I have a fixed layout with a header, footer, side panel and a central area. It is possible to keep the layout and just change the contents of the central area dynamically?
For example, depending on the selected menu option from the header to load different forms vaadin made in the central area, keeping the rest of the layout

Thank you very much and sorry for my bad English

That is exactly what Vaadin (and other AJAX based applications) do. For example, take a look at
the sampler
as it does pretty much what you described.