Regards,
David Gilbert wrote:
The ChartPanel class overrides paintComponent(Graphics) and casts the
incoming Graphics object the Graphics2D subclass - this is very common
in Swing apps as a way to gain access to Java2D features for drawing
on Swing components. I'm almost certain that the Graphics object is
guaranteed to be a Graphics2D instance, and the original method
signature is maintained for backwards compatibility only, although
this isn't mentioned in the API specification. The only reference
I've been able to find is this one in the Java tutorial:
http://java.sun.com/docs/books/tutorial/uiswing/14painting/practice.html
There it is written "you can cast the |Graphics| parameter into a
|Graphics2D| object.", and this is java.sun.com. Looks like documented
behavior. Probably it is time to fill in the bug report.
Audrius.
