Re: What do these errors mean?

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From	Knute Johnson <nospam@knutejohnson.com>
Newsgroups	comp.lang.java.gui
Subject	Re: What do these errors mean?
Date	Sun, 12 Feb 2012 09:17:01 -0800
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On 2/12/2012 9:07 AM, Lew wrote:
> Knute Johnson wrote:
>> A B wrote:
>>> I've finally got around to compiling my program with -Xlint, as the
>>> compiler kept nagging me to. This is what I got. (I've removed some
>>> entries for different bits that caused identical errors.) I haven't a
>>> clue what any of it means or what to do about it; can anyone enlighten
>>> me? What's a raw type, for instance, and what's a serializable class and
>>> how do you give it a definition of serialVersionUID?
>>> ----------------------------------------------
>>> Vectorine.java:39: warning: [rawtypes] found raw type: JComboBox
>>> JComboBox droplist = new JComboBox();
>>> ^
>>> missing type arguments for generic class JComboBox<E>
>>> where E is a type-variable:
>>> E extends Object declared in class JComboBox
> ...
>
>> I can tell you are using Java 7, JComboBox has changed to a generic
>> class.  The simple answer is if you are creating a JComboBox of Strings,
>> declare it thus;
>>
>> JComboBox<String>  box = new JComboBox<String>(String[] items)
>
> Or, since it's Java 7,
>
>   JComboBox<String>  box = new JComboBox<>(items)
>
> (The 'String[]' in an invocation is an error. It is useful to show a possible
> type for the argument, but is not compilable as such. So, "A B", be sure to vet
> any code before blindly copying and pasting. Usenet code posts are often, as
> above, actually pseudocode.)
>

True, I pulled it from the Docs, and I did forget that you don't need to 
specify the type on the right.

-- 

Knute Johnson

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Thread

What do these errors mean? "A B" <@bleBaker.uk> - 2012-02-12 16:16 +0000
  Re: What do these errors mean? Lew <lewbloch@gmail.com> - 2012-02-12 08:54 -0800
  Re: What do these errors mean? Knute Johnson <nospam@knutejohnson.com> - 2012-02-12 08:55 -0800
    Re: What do these errors mean? Lew <lewbloch@gmail.com> - 2012-02-12 09:07 -0800
      Re: What do these errors mean? Knute Johnson <nospam@knutejohnson.com> - 2012-02-12 09:17 -0800
  Re: What do these errors mean? Roedy Green <see_website@mindprod.com.invalid> - 2012-02-13 07:47 -0800
  Re: What do these errors mean? "A B" <@bleBaker.uk> - 2012-02-16 20:50 +0000
    Re: What do these errors mean? Lew <lewbloch@gmail.com> - 2012-02-16 13:01 -0800
      Re: What do these errors mean? "A B" <@bleBaker.uk> - 2012-02-16 21:44 +0000
        Re: What do these errors mean? Jeff Higgins <jeff@invalid.invalid> - 2012-02-16 17:54 -0500
          Re: What do these errors mean? "A B" <@bleBaker.uk> - 2012-02-17 18:21 +0000
    Re: What do these errors mean? Roedy Green <see_website@mindprod.com.invalid> - 2012-02-17 15:36 -0800

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