public static PrintService choosePrinter() {

    PrinterJob printJob = PrinterJob.getPrinterJob();

    if(printJob.printDialog()) {

        return printJob.getPrintService();          

    }

    else {

        return null;

    }

}

​

public static void printPDF(String fileName, PrintService printer)

        throws IOException, PrinterException {

    PrinterJob job = PrinterJob.getPrinterJob();

    job.setPrintService(printer);

    PDDocument doc = PDDocument.load(fileName);

    doc.silentPrint(job);

}