JTextArea on JWindow

Question

Why can't I make a JTextArea on JWindow uneditable?
Heres the code:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Note extends JWindow {
JTextArea ta;
public static void main(String args[]) {
new Note();
public Note() {
ta = new JTextArea("j;lsa ;lasjfasdf asdf sadfsadfsad ;lkasdf ;lksa;lkfs;al fj;lksadfl; l;kslkfdf l");
ta.setLineWrap(true);
ta.setWrapStyleWord(true);
ta.setFont(new Font("Verdana",Font.BOLD,24));
ta.setEditable(true);
JScrollPane scrollPane = new JScrollPane(ta,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
getContentPane().setLayout(new BorderLayout());
getContentPane().add(scrollPane,BorderLayout.CENTER);
setSize(300, 300);
setVisible(true);
// Give focus for keystrokes
requestFocus();
but when I changed extends JWindow into extends JFrame, ta.setEditable(true) worked fine.
Please explain it to me. Thank you very much.

Answer 1

>
JWindow and focus: If you happen to use a JWindow in your GUI, you should know that the JWindow's owning frame must be visible for any components in the window to get the focus. By default, if you don't specify an owning frame for a JWindow, an invisible owning frame is created for it. The result is that components in JWindows might not be able to get the focus. The solution is to either specify a visible owning frame when creating the JWindow, or to use an undecorated JFrame instead of JWindow.
from:
http://java.sun.com/docs/books/tutorial/uiswing/misc/focus.html