Keyboard focus lost in Swing applications (ex: Netbeans) after changing to window

[Daniel Clemente]

Hi, sorry if this message comes twice (I posted yesterday via NNTP without 
being subscribed to the list).


  ion3 is stealing keyboard focus to Swing applications. This happens for 
instance with Netbeans 6.5:

1. Open netbeans and some other programs in tabs next to it.
2. Select netbeans and open an editor with some code; the cursor is inside the 
editor
3. Select another tab (either clicking teh tab or with keyboard).
4. Select netbeans again (either clicking the tab or with keyboard).
5. Try to continue typing, but you can't. The cursor is nowhere, and *no key* 
works (space, cursors, A-S-o, ... all gone). You must click again in the editor 
and then you can type again.

In fact any Swing application has this problem. You can use this one to test:

--- TypeInSwing.java ----------------------------------------

import javax.swing.JFrame;
import javax.swing.JTextField;

public class TypeInSwing {
  public static void main(String[] args) {
    JFrame frame = new JFrame("HelloWorldSwing");
    final JTextField field = new JTextField("type here");

    frame.getContentPane().add(field);

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.pack();
    frame.setVisible(true);
  }
}

--------------------------------------------------------------

It happens with latest version 20090110 (with 20080207 too).

I am using:

$ java -version
java version "1.6.0_06"
Java(TM) SE Runtime Environment (build 1.6.0_06-b02)
Java HotSpot(TM) Server VM (build 10.0-b22, mixed mode)


  Why is it so?


Daniel