Java SE (Java Platform, Standard Edition)

In my application there is an update screen (JPanel). I am using default button in that panel. The input field is a normal JTextField. When the update is over the cursor goes back to the input JTextField.

Now my problem is that when I carry out update with mouse, the cursor is correctly placed into the input JTextField and is visible after the update is over. On the other hand, if I carry out the same update operation using default button (using keyboard), the cursor gets placed correctly in the input JTextfield column, but becomes invisible. If I minimize and then again maximize the window, the cursor appears back. What am I missing ? Note that I am using component.requestFocusInWindow() to get focus back to the input JTextField.

regards,
nirvan