Name: gm110360 Date: 02/09/2004


FULL PRODUCT VERSION :
java version "1.5.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta-b32c)
Java HotSpot(TM) Client VM (build 1.5.0-beta-b32c, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
If the table header is null, JTable.updateUI() throws a
NullPointerException and fails.

I'm not sure I selected the right version on "Regression" - I can't
see the significant part of the choices on this web page (the text
is cut off). Anyway it worked in 1.4.2_03.



REGRESSION. Last worked in version tiger-beta

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run code.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Expect nothing.
ACTUAL -
Get a stack dump.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
java.lang.NullPointerException
at javax.swing.JTable.updateUI(JTable.java:2777)
at JTableBug2.main(JTableBug2.java:7)
Exception in thread "main"


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
   import javax.swing.*;

    class JTableBug2 {
       public static void main(String[] args) {
         JTable table = new JTable();
         table.setTableHeader(null);
         table.updateUI();
      }
   }

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Use a zero-height table header instead of null.

Release Regression From : 1.4.2_03
The above release value was the last known release where this
bug was known to work. Since then there has been a regression.

(Incident Review ID: 237635)
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