How would I suppress the print dialog in this example?

问题

private void printCard() {

        PrinterJob printjob = PrinterJob.getPrinterJob();
        printjob.setJobName("Label");

        Printable printable = new Printable() {

                public int print(Graphics pg, PageFormat pf, int pageNum) {

                        if (pageNum > 0) {
                                return Printable.NO_SUCH_PAGE;
                        }

                        Dimension size = jLayeredPane2.getSize();
                        BufferedImage bufferedImage = new BufferedImage(size.width, size.height, BufferedImage.TYPE_INT_RGB);

                        jLayeredPane2.print(bufferedImage.getGraphics());

                        Graphics2D g2 = (Graphics2D) pg;
                        g2.translate(pf.getImageableX(), pf.getImageableY());
                        g2.drawImage(bufferedImage, 0, 0, (int) pf.getWidth(), (int) pf.getHeight(), null);

                        return Printable.PAGE_EXISTS;
                }
        };

        Paper paper = new Paper();
        paper.setImageableArea(0, 0, 153, 243);
        paper.setSize(243, 154);

        PageFormat format = new PageFormat();
        format.setPaper(paper);
        format.setOrientation(PageFormat.LANDSCAPE);

        printjob.setPrintable(printable, format);
        if (printjob.printDialog() == false)
                return;

        try {
                printjob.print();
        } catch (PrinterException ex) {
                System.out.println("NO PAGE FOUND." + ex);

        }
}

回答1:

From what I see in your code, you call if (printjob.printDialog() == false). This will always try to show the native printer properties dialog. The boolean return value is based on whether the user clicks OK or cancels out of the dialog. If you want to suppress the dialog, remove that if block, as the printing work that you want to perform is done via the printjob.print() call.

来源：https://stackoverflow.com/questions/3106379/how-would-i-suppress-the-print-dialog-in-this-example