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I've been using the new com.sun.awt.AWTUtilities class and am intrigued. I got com.sun.awt.AWTUtilities/setWindowOpacity(java.awt.Window window, float f) to work perfectly, but am now wondering if there is any way to change the opacity of an individual component, such as a javax.swing.JInternalFrame or javax.swing.JButton.

Ky -
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1 Answers1

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Try this:

class TransparentButton extends JButton {
        public TransparentButton(String text) { 
            super(text);
            setOpaque(false); 
        } 

        public void paint(Graphics g) { 
            Graphics2D g2 = (Graphics2D) g.create(); 
            g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.5f)); 
            super.paint(g2); 
            g2.dispose(); 
        } 
}
  • will this work if I have customized my buttons' border, background,a and foreground, already? – Ky - Nov 15 '10 at 03:42
  • So far as I know it should. The only way to know for sure is to test it out though. –  Nov 15 '10 at 03:43