Re: How many warnings is too many?

ricky.clarkson@xxxxxxxxx <ricky.clarkson@xxxxxxxxx> wrote:
> Thomas,
>
> > For normal uses
> > there is no point extending JPanel. But banning a component extending
> > JComponent is absurd.
>
> To my eyes, the main difference between JPanel and JComponent is that
> JPanel is opaque by default. I might have missed something. So I will
> read your text as if you said JPanel twice and omitted JComponent..
>
> What you say is true only if abnormal uses are justified. What are
> these abnormal uses?

There's a difference of intent that matters. JPanel is intended to be
used as a container for other components, and not contain a lot of logic
of its own. I'm certain that's what Thomas meant. No point in
extending when you're just going to add children... but there is a point
in extending if you're implementing a true custom component.

The fact that custom components sometimes extend JPanel, or that
JComponent is technically a container, is irrelevant.

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