javafx - TextArea を USB サーマル プリンター 58mm に印刷するにはどうすればよいですか?(JAVAFX)

Question

だから私は領収書を印刷したい請求システムを作ろうとしています.オンラインで見つけたいくつかのコードでそれを行うことができましたが、フォントサイズが大きすぎて58mm幅の紙に印刷できません.I' m はフォント サイズを調整できません。

コードは次のとおりです。

public class PrinterService implements Printable {

    public List<String> getPrinters(){

        DocFlavor flavor = DocFlavor.BYTE_ARRAY.AUTOSENSE;
        PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet();

        PrintService printServices[] = PrintServiceLookup.lookupPrintServices(
                flavor, pras);

        List<String> printerList = new ArrayList<String>();
        for(PrintService printerService: printServices){
            printerList.add( printerService.getName());
        }

        return printerList;
    }

    @Override
    public int print(Graphics g, PageFormat pf, int page)
            throws PrinterException {
        if (page > 0) { /* We have only one page, and 'page' is zero-based */
            return NO_SUCH_PAGE;
        }

        /*
         * User (0,0) is typically outside the imageable area, so we must
         * translate by the X and Y values in the PageFormat to avoid clipping
         */
        Graphics2D g2d = (Graphics2D) g;
        g2d.translate(pf.getImageableX(), pf.getImageableY());
        /* Now we perform our rendering */

        g.setFont(new Font("Roman", 0, 8));
        g.drawString("Hello world !", 0, 10);

        return PAGE_EXISTS;
    }

    public void printString(String printerName, String text) {

        // find the printService of name printerName
        DocFlavor flavor = DocFlavor.BYTE_ARRAY.AUTOSENSE;
        PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet();

        PrintService printService[] = PrintServiceLookup.lookupPrintServices(
                flavor, pras);
        PrintService service = findPrintService(printerName, printService);

        DocPrintJob job = service.createPrintJob();

        try {

            byte[] bytes;

            // important for umlaut chars
            bytes = text.getBytes("CP437");

            Doc doc = new SimpleDoc(bytes, flavor, null);


            job.print(doc, null);

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    public void printBytes(String printerName, byte[] bytes) {

        DocFlavor flavor = DocFlavor.BYTE_ARRAY.AUTOSENSE;
        PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet();

        PrintService printService[] = PrintServiceLookup.lookupPrintServices(
                flavor, pras);
        PrintService service = findPrintService(printerName, printService);

        DocPrintJob job = service.createPrintJob();

        try {

            Doc doc = new SimpleDoc(bytes, flavor, null);

            job.print(doc, null);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private PrintService findPrintService(String printerName,
                                          PrintService[] services) {
        for (PrintService service : services) {
            if (service.getName().equalsIgnoreCase(printerName)) {
                return service;
            }
        }

        return null;
    }
}

@FXML
public void printit(ActionEvent actionEvent)
{
    PrinterService printerService = new PrinterService();

    System.out.println(printerService.getPrinters());

    //print some stuff
    printerService.printString("POS-58-Series", area.getText());
}