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From: Knute Johnson <nospam@knutejohnson.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: Generics ?
Date: Fri, 16 Dec 2011 22:01:08 -0800
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On 12/16/2011 2:10 AM, Roedy Green wrote:
> On Thu, 15 Dec 2011 21:48:06 -0800, Knute Johnson
> <nospam@knutejohnson.com>  wrote, quoted or indirectly quoted someone
> who said :
>
>> public class KList extends JList {
>>      ListModel model = new DefaultListModel();
>
> If you were just using JList by itself you would say:
>
>   final JList<String>  flavour = new JList<String>( new String[] {
>                      "strawberry", "chocolate", "vanilla" } );
>
> Your new class KList can have a built-in fixed contained type, e.g.
> String or it can have a variable one.
>
> The first is pretty obvious :
>
> class KList extends JList<String>
>
> The second you can discover by looking for some similar Sun code in
> src.zip, e.g.
>
> public interface MutableComboBoxModel<E>  extends ComboBoxModel<E>  {
>
> so I would think
>
> KList<E>  extends JList<E>
> should work.
>
> For additional hints, see http://mindprod.com/jgloss/generics.html
> and links
>
> I have not tested this and quite commonly things in generics I think
> should work do not. Take this just as a hint of something to try.

Yeah, unfortunately that doesn't work.  Is it possible to extend JList 
and not get unchecked warnings?

-- 

Knute Johnson