For the older printing api "PrintJob" etc Nimbus needs to be able to paint to a Graphics object not a Graphics2D.

For the 1.2 and newer "PrinterJob" api Nimbus should not use image caching so that high-resolution vector graphics are printed.

Also with the new Scene Graph library it is using PrinterGraphics the same as a 1.2 or later print job and should have caching turned off so it renders high-resolution vector graphics.