Printing with SDK 1.4

Question

Hi,
I have a couple of questions regarding the new print api that comes with JSDK 1.4, JPS.
1. We have a barcode printer, which we'd like to print using Java JPS. Our attempts are shown here:
DocFlavor doc_flavor = DocFlavor.SERVICE_FORMATTED.PRINTABLE;
PrintService print_services[] = PrintServiceLookup.lookupPrintServices(doc_flavor, null);
DocPrintJob print_job = print_services[0].createPrintJob(); // 0 is the barcode printer
ShapesPrint data = new ShapesPrint();
Doc doc = new SimpleDoc(data, doc_flavor, null);
try {
   print_job.print(doc, null);
catch(Exception e) {
   e.printStackTrace();
}We could print, with this code, using our laser printer. However, while trying to print via the barcode printer, we received:
java.lang.ArrayIndexOutOfBoundsException
at sun.print.Win32PrintService.getDefaultAttributeValue Win32PrintService.java:786)
at sun.print.Win32PrintJob.printableJob(Win32PrintJob.java:413)
at sun.print.Win32PrintJob.print(Win32PrintJob.java:342)
at print.printtest.<init>(printtest.java:39)
at print.printtest.main(printtest.java:50)We decompiled sun.print.Win32PrintService to see what went wrong. What we noticed that it may be something with defPaper value. Then, we checked in our debugger, the value of printservices.defPaper, which showed 261. Is it something we do wrong, or is it related with the printer driver?
2. How does JPS gather information about print services (PrintServices)?
Thanks in advance.
Muzaffer Ozakca

Answer 1

Hi again,
We found a workaround by adding:
HashPrintRequestAttributeSet attr = new HashPrintRequestAttributeSet();
attr.add(MediaSizeName.ISO_A9);
// and
PrintService selected_service = ServiceUI.printDialog(
     null,
     100,
     100,
     print_services,
     default_service,
     doc_flavor,
     (PrintRequestAttributeSet) attr);So, instead of requesting a default paper, we set it to a known value avoiding an exception.