Different dimesions between LookAndFeel's

[Lars Tode]

Hi,
i've there a gui, where the user can change the LookAndFeel.
I don't want that the user can change the window size for example. my problem now is, that when the user change the LookAndFeel, the size off components changed (a JTextArea f.i.).
Because i don't want to implement for each LookAndFeel own dimension, i search for an other posibility.
So, is there a way to find out the dimension of the LookAndFeel that is used for each component?
regards
Lars