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Re: Outside of the EDT: JOptionPane.showMessageDialog

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In article <EDT-20121227231618@ram.dialup.fu-berlin.de>,
 ram@zedat.fu-berlin.de (Stefan Ram) wrote:

> public class Main
> { public static void main( final java.lang.String[] args )
>   { final javax.swing.JFrame frame = new javax.swing.JFrame( "Hallo Swing!" );
>     frame.setDefaultCloseOperation( javax.swing.JFrame.EXIT_ON_CLOSE );
>     frame.setVisible( true ); }}
> 
>   It hurts somewhat to see this, but this example appears 
>   just after the introduction of »new«, and makes the effect
>   of »new« visible somehow, so I thought it might be a good
>   motivation. In a sense, a JFrame is a »visible object«, so
>   this example visualizes objects, which might help to learn.
>   But I have not yet introduced interface implementations, and
>   so I cannot yet implement java.lang.Runnable.

This seems like a reasonable compromise. When returning to the 
topic, the example is simple enough to trace execution and show 
that, while a particular implementation may be thread-safe, 
there is no general assurance without starting on the EDT. The 
didactic problem is complicated by the fact that incorrect 
examples rarely fail reliably, and examples that fail reliably 
are often so contrived as to to be obviously incorrect.

-- 
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>

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Re: Outside of the EDT: JOptionPane.showMessageDialog Knute Johnson <nospam@knutejohnson.com> - 2012-12-26 22:03 -0800
  Re: Outside of the EDT: JOptionPane.showMessageDialog "John B. Matthews" <nospam@nospam.invalid> - 2012-12-27 10:23 -0500
    Re: Outside of the EDT: JOptionPane.showMessageDialog Knute Johnson <nospam@knutejohnson.com> - 2012-12-27 09:06 -0800
      Re: Outside of the EDT: JOptionPane.showMessageDialog "John B. Matthews" <nospam@nospam.invalid> - 2012-12-27 16:16 -0500
    Re: Outside of the EDT: JOptionPane.showMessageDialog "John B. Matthews" <nospam@nospam.invalid> - 2012-12-27 16:34 -0500
      Re: Outside of the EDT: JOptionPane.showMessageDialog "John B. Matthews" <nospam@nospam.invalid> - 2012-12-29 10:38 -0500
        Re: Outside of the EDT: JOptionPane.showMessageDialog Lew <lewbloch@gmail.com> - 2012-12-31 12:00 -0800

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