问打印标签Java，Loops(?)

EN

private final int PAGE_WIDTH = Math.round(MediaSize.ISO.A4.getX(MediaSize.MM));
private final int PAGE_HEIGHT = Math.round(MediaSize.ISO.A4.getY(MediaSize.MM) / 8);
private PrinterJob job = PrinterJob.getPrinterJob();
private Graphics2D column;
private Font font = new Font("Serif", Font.BOLD, 9);

private int writeOnRow = 0;
private int pageRow = 0;
private int columnSpace = 4;
private int itemsInRow = 3;
private int itemCurrentRow = 0;

public Printer(final ArrayList<Customers> resultAsList) {
    resultAsList.remove(0);

    job.setPrintable(new Printable() {
        public int print(Graphics g, PageFormat pf, int pageIndex) throws PrinterException {
            if (pageIndex > 0) { 
                return NO_SUCH_PAGE;
            }

            column = (Graphics2D)g;
            column.translate(pf.getImageableX(), pf.getImageableY());

            column.setFont(font);

            for (Customers c : resultAsList) {
                String line =
                        c.getName() + "\n" +
                                c.getAddress() + "\n" +
                                c.getPostcode() + " " + c.getCity();

                //DATA, COLUMN, ROW
                column.drawString(c.getName(), columnSpace, writeOnRow += column.getFontMetrics().getHeight() + 2);
                column.drawString(c.getAddress(), columnSpace, writeOnRow += column.getFontMetrics().getHeight() + 2);
                column.drawString(c.getPostcode() + " " + c.getCity(), columnSpace, writeOnRow += column.getFontMetrics().getHeight() + 2);


                if (itemCurrentRow == itemsInRow) {
                    pageRow += PAGE_HEIGHT;
                    itemCurrentRow = 0;
                    columnSpace = 4;
                    itemCurrentRow++;
                } else {
                    writeOnRow = pageRow;
                    columnSpace += PAGE_WIDTH;
                    itemCurrentRow++;
                }

                writeOnRow += pageRow;
                laps++;

            }
            return PAGE_EXISTS;
        }
    });

    boolean doPrint = job.printDialog();

    if (doPrint) {
        try {
            job.print();
        } catch (PrinterException ex) {
            System.out.println(ex);
        }
    }
}