javax.print: impossible to print a PDF/PS document with 2 pages persheet?

[Pascal]

- the dialog in javax.print.ServiceUI.printDialog does not allow to
set a "number of pages per sheet"

- the javax.print.attribute.standard.NumberUp does not seem to work,
when added in the PrintRequestAttributeSet and used by the following
methods:
- PrintServiceLookup.lookupPrintServices
- DocPrintJob.print ( doc flavour, PrintRequestAttributeSet)