Change Application Icon in Desktop Application

Hi everyone,
I'm relatively new to netbeans, I just want to change the Java "coffee" icon from my application with another icon...
I tried the following code from my FrameView:


JFrame mainFrame = GeoJaxConfiguratorApp.getApplication().getMainFrame();
ImageIcon imageIcon = new ImageIcon("C:\\iconCheckAll.gif");
mainFrame.setIconImage(image.getImage());

But it doesn't work... what is the problem?

Regards,

Giorgio

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