How to make a Graphics2D object from a Graphics object?

Hallo !
Graphics g = pj.getGraphics();
Graphics2D g2 = (Graphics2D) g;I get an Exception as follows:
java.lang.ClassCastException: sun.awt.windows.WPrintGraphicsWrapper
Is there an other possibility to to make a Graphics2D Object ? Or can I repair the error on an other way?
Thank you Wolfgang

Yes JBuilder makes a reference to this line.
pj is a PrintJob.
The only lines in this method for test are
PrintJob pj = Toolkit.getDefaultToolkit().getPrintJob(p,"PrintWindow",null);
Graphics g = pj.getGraphics();
Graphics2D g2 = (Graphics2D) g;
pj.end();Exception occurred during event dispatching:
java.lang.ClassCastException: sun.awt.windows.WPrintGraphicsWrapper
Wolfgang

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How to make a Graphics2D object from a Graphics object?

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