Enumerate the content elements with a ElementIterator in JTextArea in Java

import java.awt.Font;
/*from ww  w.j a va  2  s . c  o m*/
import javax.swing.JFrame;
import javax.swing.JTextArea;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.Element;
import javax.swing.text.ElementIterator;

public class Main extends JFrame {

  public Main() {
    JTextArea textarea = new JTextArea("Initial Text");
    textarea.setFont(new Font("LucidaSans", Font.PLAIN, 40));
    add(textarea);    

    Document doc = textarea.getDocument();
    ElementIterator it = new ElementIterator(doc.getDefaultRootElement());
    Element e;
    while ((e = it.next()) != null) {
      if (e.isLeaf()) {
        int rangeStart = e.getStartOffset();
        int rangeEnd = e.getEndOffset();

        String line = null;
        try {
          line = textarea.getText(rangeStart, rangeEnd - rangeStart);
        } catch (BadLocationException e1) {
          // TODO Auto-generated catch block
          e1.printStackTrace();
        }
        System.out.println(line);
      }
    }

  }

  public static void main(String[] args) {
    JFrame frame = new Main();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    frame.pack();
    frame.setVisible(true);
  }
}