ok, ho fatto un pò di modifiche:
codice:
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;

public class PrintImage implements Printable {

    private double x;
    private double y;
    private double width;
    private int orientation;
    private BufferedImage image;

    public PrintImage(PrinterJob printJob, BufferedImage image) {
        PageFormat pageFormat = printJob.defaultPage();
        this.x = pageFormat.getImageableX();
        this.y = pageFormat.getImageableY();
        this.width = pageFormat.getImageableWidth();
        this.orientation = pageFormat.getOrientation();
        this.image = image;
    }

    @Override
public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) throws PrinterException {
        if (pageIndex == 0) {
            int pWidth = 0;
            int pHeight = 0;
            if (orientation == PageFormat.PORTRAIT) {
                pWidth = (int) Math.min(width, (double) image.getWidth());
                pHeight = pWidth * image.getHeight() / image.getWidth();
            } else {
                pHeight = (int) Math.min(width, (double) image.getHeight());
                pWidth = pHeight * image.getWidth() / image.getHeight();
            }
            graphics.drawImage(image, (int) x, (int) y, pWidth, pHeight, null);
            return PAGE_EXISTS;
        } else {
            return NO_SUCH_PAGE;
        }
    }
}
richiamato così:
codice:
String imgTest = "/home/matte/Desktop/C180-001.jpg";
Image image = new Image(new File(imgTest).toURI().toString());
BufferedImage bufferedImage = SwingFXUtils.fromFXImage(image, null);
PrinterJob pj = PrinterJob.getPrinterJob();
pj.setPrintable(new PrintImage(pj, bufferedImage));
if (pj.printDialog()) {
    try {
        pj.print();
    } catch (PrinterException e) {
        GenericDialog.showDialog(e.getMessage(), Alert.AlertType.ERROR);
    }
}
l'immagine è stata stampata correttamente.

ora vorrei stampare le immagini prese da una ListView.
secondo voi come sarebbe meglio procedere??