Java Swing: Does the phrase "favor composition over inheritance" apply?

Question

Does the phrase "favor composition over inheritance" apply to Swing components? I'd like to gather some professional opinions about the subject and which code is easier to maintain before I go ahead and design a UI.

Answer 1

Does the phrase "favor composition over inheritance" apply to Swing components?

Yes.

The only time I extend a Swing component is when I need to override one or more of the methods. For instance, I'll extend a JPanel when I want to override the paintComponent method.

All other times, my class will contain the Swing component(s) I need. This allows me to separate my class methods:

frame.getMethod();

from the Swing component class methods:

frame.getFrame().getPreferredSize();