How to set focus on the last row of JTextPane

Question

how to set focus on the last row of JTextPane?
import javax.swing.*;
import javax.swing.text.html.*;
import java.awt.*;
import java.awt.event.*;
public class MyGUITest extends JPanel implements ActionListener
{   public static void main(String[] args)
    {   SwingUtilities.invokeLater(new Runnable()
         {   public void run()
          {    JFrame f = new JFrame("My GUI");
              MyGUITest GUI = new MyGUITest();
              GUI.setOpaque(true);
              f.setContentPane(GUI);
              f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
              f.pack();
              f.setLocationRelativeTo(null);
              f.setVisible(true);
    JTextPane txtP;
    JButton add;
    HTMLEditorKit hek;
    HTMLDocument hd;
    String txt;
    MyGUITest()
    {     this.setLayout(new BorderLayout());
     this.setPreferredSize(new Dimension(400,200));
     txtP = new JTextPane();
     txtP.setEditable(false);
     txtP.setContentType("text/html");
     txtP.setText("");
     hek = new HTMLEditorKit();
     txtP.setEditorKit(hek);
     hd = new HTMLDocument();
     txtP.setDocument(hd);
     JScrollPane sTxtA = new JScrollPane(txtP);
     add = new JButton("add");
     add.addActionListener(this);
     sTxtA.setBorder(BorderFactory.createTitledBorder(""));
     this.add(sTxtA, BorderLayout.CENTER);
     add(add, BorderLayout.SOUTH);
     new Thread(new Runnable()
     {   public void run()
         {   while(true)
          {   try
              {     Thread.sleep(100);
              }catch(InterruptedException ex)
              {     ex.printStackTrace();
              appendText("This is <b>HTML</b> text");
              //add.doClick();
     }).start();
    public void actionPerformed(ActionEvent e)
    {     txt = "<b>asd</b>";
     try
     {   hek.insertHTML(hd, hd.getLength(), txt, 0, 0, null);
     }catch(Exception ex){   ex.printStackTrace();   }
    public void appendText(String txt)
    {     try
     {   hek.insertHTML(hd, hd.getLength(), txt, 0, 0, null);
     }catch(Exception ex){   ex.printStackTrace();   }
}thanks~

Answer 1

anIdiot wrote:
im not sure what is the caret location...So don't youthink you should have looked for it in the API?
anyway, i want the scroll bar to scrolled down automatically when the output is displayed.
normally, the scroll bar is scrolled down automatically when a new text is inserted, but it doesnt work on this timeGo through camockr's http://tips4java.wordpress.com/2008/10/22/text-area-scrolling/
db