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Re: What do these errors mean?

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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.)

-- 
Lew

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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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