Print out a Swing component in Java

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import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.UIManager;

public class Main implements Printable, ActionListener {

  JFrame frameToPrint;

  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 print the window and its visible contents */
    frameToPrint.printAll(g);

    /* tell the caller that this page is part of the printed document */
    return PAGE_EXISTS;
  }

  public void actionPerformed(ActionEvent e) {
    PrinterJob job = PrinterJob.getPrinterJob();
    job.setPrintable(this);
    boolean ok = job.printDialog();
    if (ok) {
      try {
        job.print();
      } catch (PrinterException ex) {
        /* The job did not successfully complete */
      }
    }
  }

  public Main(JFrame f) {
    frameToPrint = f;
  }

  public static void main(String args[]) {
    UIManager.put("swing.boldMetal", Boolean.FALSE);
    JFrame f = new JFrame("Print UI Example");
    f.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
    JTextArea text = new JTextArea(50, 20);
    for (int i = 1; i <= 50; i++) {
      text.append("Line " + i + "\n");
    }
    JScrollPane pane = new JScrollPane(text);
    pane.setPreferredSize(new Dimension(250, 200));
    f.add("Center", pane);
    JButton printButton = new JButton("Print This Window");
    printButton.addActionListener(new Main(f));
    f.add("South", printButton);
    f.pack();
    f.setVisible(true);
  }
}