Thread: Set page margins when printing in java

Hello,

I wanted to set page margins and reduce them to accommodate the whole table I am creating.

This is the code I am using to print :-

JTextArea result_txt = new JTextArea(""); 
        JScrollPane sp_result_txt = new JScrollPane(result_txt);
        result_txt.setFont(new Font("Courier", Font.PLAIN, 11));
        result_txt.setText("some string generated dynamically");
 
try {
            boolean complete = result_txt.print();
            if (complete) {
                System.out.println("Success");
 
            } else {
                System.out.println("failed");
            }
        } catch (Exception pe) {
            System.out.println("error");
        }

thanks in advance.

EDIT:- I just tried margins on JTextArea itself like this

result_txt.setMargin(new Insets(-10, -10, -10, -10));

Doesnt work for printing on paper though.

On a closer look in the dialog box which pops open for print, the margins are pre-set to 1 inch on all top, bottom, left and right.

If it is possible even zero inch margins will be good.

Thanks again.

Alright now I have found this article/code

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.awt.print.PageFormat;
import java.awt.print.Paper;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
 
public class MainClass {
  public static void main(String[] args) throws Exception {
    PrinterJob pj = PrinterJob.getPrinterJob();
 
    PageFormat pf = pj.defaultPage();
    Paper paper = new Paper();
    double margin = 9;
    paper.setImageableArea(margin, margin, paper.getWidth() - margin * 2, paper.getHeight()
        - margin * 2);
    pf.setPaper(paper);
 
    pj.setPrintable(new MyPrintable(), pf);
    if (pj.printDialog()) {
      try {
        pj.print();
      } catch (PrinterException e) {
        System.out.println(e);
      }
    }
  }
}
 
class MyPrintable implements Printable {
  String str;
  public MyPrintable(String getStr)
  {
     str = getStr;
  }
  public int print(Graphics g, PageFormat pf, int pageIndex) {
    if (pageIndex != 0)
      return NO_SUCH_PAGE;
    Graphics2D g2 = (Graphics2D) g;
    g2.setFont(new Font("Serif", Font.PLAIN, 36));
    g2.setPaint(Color.black);
    g2.drawString(str, 100, 100);
    Rectangle2D outline = new Rectangle2D.Double(pf.getImageableX(), pf.getImageableY(), pf
        .getImageableWidth(), pf.getImageableHeight());
    g2.draw(outline);
    return PAGE_EXISTS;
  }
}

Seems to work but then it only prints one line. I think the "\n" in str is neglected totally. How to get around this now. Also if there is a better way to print a JTextArea and specify margins too let me know. Thanks.