无法通过点阵打印机上的java打印设置自定义页面大小

Question

我们正在尝试通过点阵打印机上的java打印。我们使用自定义大小创建了Paper对象。但是当它进入打印机时，它不需要自定义尺寸。它需要11英寸或12英寸的尺寸。以下是我们正在使用的代码。请建议解决方案。

    PrinterJob job = PrinterJob.getPrinterJob();    // Get a PrinterJob.      

    PageFormat format = job.defaultPage();   // Get the default page format, then ask the user to customize it.

    Paper paper = format.getPaper();         // Note: Custom size of paper should be supported by attach Printer.

    paper.setSize((PaperWidth*72),
                    (PaperHeight*72));      // Set Custom size of the Paper.

    paper.setImageableArea(MarginLeft*72,  MarginTop*72,
                           paper.getWidth() - MarginRight*72 - MarginLeft*72,
                           paper.getHeight()- MarginBottom*72 - MarginTop*72);

    System.out.println(paper.getHeight());

    format.setPaper(paper);                                 // Set the paper.


    PageFormat pf = job.validatePage(format);

    Book bk = new Book();                                   // Set up a book, with exact no. of pages to be printable.
    bk.append(new TestClass(), pf, numPages);
    job.setPageable(bk);                                    // Pass the book to the PrinterJob

    ////// OR set printable without book.
    //// job.setPrintable(new TestClass(),format);

    if (job.printDialog())                                  // Put up the dialog box
    {    
        try  
        {
            job.print();                                    // Print the job if the user didn't cancel printing.
        } 
        catch (PrinterException ex)
        {

        }