On Thu, 2 Jun 2022 12:25:18 GMT, Tejesh R <[email protected]> wrote:
>> _Header_ object not initialized/set when paint() method of
>> `WindowTableHeaderUI` class is executed. The paint() event is executed
>> through explicit call of `JTable.updateUI()` in the regression test. In
>> order to set the _header_ to the _called_ JTable, it is set in the
>> `getTableCellRendererComponent()` method, which in turn makes the _header_
>> object available during paint event without causing NPE.
>
> Tejesh R has updated the pull request incrementally with one additional
> commit since the last revision:
>
> Changed from manual to Automatic Test
I see that the bug description has a test case which produce this exception.
There are these lines on the stack:
at
sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:116)
at java.awt.Container.paint(Container.java:1978)
at java.awt.Window.paint(Window.java:3906)
So your automatic test may override the paint method and catch an exception
there. The main method will check some flags at the end. You can also repaint
the window a few times to make sure it is painted. Can we iterate all installed
L&F? It seems the test does not have any windows specific code.
I think that the rendering to the BufferedImage as suggested by @aivanov-jdk
should work as well.
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PR: https://git.openjdk.java.net/jdk/pull/8830
