Newbie question anti-patterns and wicket, constructor component building

[Brown, Berlin [GCG-PFS]]

I am sorry, am just getting used to Wicket but I notice a lot of use of
calling a lot of code in the constructor.  Does it really matter?  I
mention it because this kind of style makes it difficult to test code
because code in the constructor may fail and the object won't be
created.
 
Should I just create a method and call that method in the constructor?