Re: [cinjug-users] Splash Screen from an executable jar

[Matt Avery <mavery@xxxxxxxxxxxxxxx>]

Steve,

On the first line it looks like you are using the String constructor for 
ImageIcon.  I don't think that will work from inside the jar.  Try using 
the URL constructor for ImageIcon and get the URL from the ClassLoader's 
getResource() method like this.

URL imageUrl = this.getClass().getClassLoader().getResource( filename );
JLabel label = new JLabel(new ImageIcon( imageUrl ) );

If that doesn't work you could try loading a byte array using the 
ClassLoader's getResourceAsStream() method and use the byte array 
constructor for ImageIcon.

Steve Metter wrote:
> My application displays a splash screen when it starts by putting up a
> JLabel containing an ImageIcon containing a PNG file. The entire snippet
> of code looks like this:
>
> JLabel label = new JLabel(new ImageIcon(filename));
> getContentPane().add(label, BorderLayout.CENTER);
> pack();
> Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
> Dimension labelSize = label.getPreferredSize();
> setLocation(MainPanel.HORIZONTAL_SIZE/2 - (labelSize.width/2),
>                 MainPanel.VERTICAL_SIZE/2 - (labelSize.height/2));
> setVisible(true);
>
> It works just fine on my development machine, but the splash screen fails
> to display when I run the application as an executable jar.
>
> I've proven that the right code and the image file are all contained in
> the jar, and everything else about the application works from the jar
> (including other PNG images).
>
> I am not running it as a separate thread, because it doesn't need to be
> (although I believe I've eliminated that as the cause of the problem).
>
> Is there something magic about running from an executable jar that would
> affect how image files work or how a splash screen works or something?
>
> Thanks for any ideas that anyone can suggest.
>
>
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--
Matthew Avery
Senior Developer
(513) 470-5316
http://www.einnovation.com/