Fill a rounded rectangle with a gradient paint with "new RoundRectangle2D"?

Question

Hello,
at the moment I have to do a lot of Java2D to draw a customized GUI. Now it comes to a simple task, filling a rounded rectangle with a gradient paint. I have a solution for this - but I don't know if it is bad to do it this way:
private void drawBackground( Component component, Graphics2D graphics2d ) {
     int w = component.getWidth() - 1;
     int h = component.getHeight() - 1;
     graphics2d.setPaint( gradientPaint );
     RoundRectangle2D backgroundShape =
          new RoundRectangle2D.Float( 0, 0, w, h, 10, 10 );
     graphics2d.fill( backgroundShape );
}This is very easy and it works. The backdraw is, that on every call of "drawBackground", which is called on a repaint() method by Swing, a "new RoundRectangle2D.Float" will be created. I don't know how "expensive" it is to create a new RoundRectangle2D. On the other hand, I don't know how to fill a rounded rectangle with a gradient paint without a RoundRectangle2D.
When I do it this way, I worry that at a later time, when I created a lot of custom components that all create shapes on a repaint, the GUI may become horrible slow or has a huge memory footprint.
Well, I would like to hear some kind of "this is okay" (maybe because those Shape implementation are all not very memory consuming and the instanciation in Java is not very time consuming) by you Java2D experts :) Or, of course, how I could do it better.
Thanks a lot for your help!

Answer 1

patb1 wrote:
on every call of "drawBackground", which is called on a repaint() method by Swing, a "new RoundRectangle2D.Float" will be created. I don't know how "expensive" it is to create a new RoundRectangle2D.
When I do it this way, I worry that at a later time, when I created a lot of custom components that all create shapes on a repaint, the GUI may become horrible slow or has a huge memory footprint.You could do as many UI delegates in the Swing code do with Rectangles: maintain a RoundRectangle2D as a field and set its attributes when it is to be painted (setRoundRect(double x, double y, double w, double h, double arcw, double arch)).
db