Overriding paintComponent() for jInternalFrame to provide transparency

Question

I am using NetBeans and Swing and have already created a working program. Within the form of the program I have an InternalFrame which consists of a scatterplot on top of a map - the scatterplot consists of pollen data for a selected week which is overlayed on the map. The user is able to select different weeks and thus the scatterplot is updated to reflect this. What I am trying to do is use Java2D and semi-transparency to make the transitions between the scatterplots changing look better i.e. fade out with the old and fade in with the new once the user selects a different week. From a little a research I have reason to believe overriding the paintComponent() for an InternalFrame with something like what is below would be the answer but I am failing miserably, can anyone help? Thanks.
    public void paintComponent(Graphics g) {
        Graphics2D g2 = (Graphics2D) g;
        g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.5f));
        super.paintComponents(g2);
        g2.dispose();
    }

Answer 1

Hi,
You may need to set the setOpaque(false) for the JIF content pane.
Quick refer the links below:
[http://coding.derkeiler.com/Archive/Java/comp.lang.java.gui/2006-05/msg00254.html|http://coding.derkeiler.com/Archive/Java/comp.lang.java.gui/2006-05/msg00254.html]
[http://forums.sun.com/thread.jspa?threadID=469200&tstart=10186|http://forums.sun.com/thread.jspa?threadID=469200&tstart=10186]
[http://www.coderanch.com/t/344772/Swing-AWT-SWT-JFace/java/Transparent-JInternalFrame|http://www.coderanch.com/t/344772/Swing-AWT-SWT-JFace/java/Transparent-JInternalFrame]