Re: What is 'symbol' and its uses?

[Shigio YAMAGUCHI]

Do you mean why variable definition is not considered as a definition?
Probably this is caused by going slow. :)

Shigio

On Wed, 13 Feb 2013 18:00:59 +0800
Leo Liu <address@hidden> wrote:

> On 2013-02-13 16:03 +0800, Shigio YAMAGUCHI wrote:
> > Would you please cooperate to leave useful information?
> > Thank you in advance.
> >
> > Shigio
> 
> The question is why BLACK, BLUE etc. (declarations) are not recognised
> as definitions but other symbols.
> 
> The relevant java snippet is as follows:
> 
> ////////////////////////////////////////////////////////////
> /**
>  *  <i>Standard draw</i>. This class provides a basic capability for
>  *  creating drawings with your programs. It uses a simple graphics model that
>  *  allows you to create drawings consisting of points, lines, and curves
>  *  in a window on your computer and to save the drawings to a file.
>  *  <p>
>  *  For additional documentation, see <a 
> href="http://introcs.cs.princeton.edu/15inout";>Section 1.5</a> of
>  *  <i>Introduction to Programming in Java: An Interdisciplinary Approach</i> 
> by Robert Sedgewick and Kevin Wayne.
>  */
> public final class StdDraw implements ActionListener, MouseListener, 
> MouseMotionListener, KeyListener {
> 
>     // pre-defined colors
>     public static final Color BLACK      = Color.BLACK;
>     public static final Color BLUE       = Color.BLUE;
>     public static final Color CYAN       = Color.CYAN;
>     public static final Color DARK_GRAY  = Color.DARK_GRAY;
>     public static final Color GRAY       = Color.GRAY;
>     public static final Color GREEN      = Color.GREEN;
>     public static final Color LIGHT_GRAY = Color.LIGHT_GRAY;
>     public static final Color MAGENTA    = Color.MAGENTA;
>     public static final Color ORANGE     = Color.ORANGE;
>     public static final Color PINK       = Color.PINK;
>     public static final Color RED        = Color.RED;
>     public static final Color WHITE      = Color.WHITE;
>     public static final Color YELLOW     = Color.YELLOW;
> 
>     ......
> }
> ////////////////////////////////////////////////////////////
> 
> -- 
> Sent from my Emacs
> 
> 
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-- 
Shigio YAMAGUCHI <address@hidden>
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