<AWT Dev> [8] Review request for 8014264: The applet pathguy_TimeDead throws java.lang.NullPointerException in java console once click drop-down check box.

[Artem Ananiev]

On 6/11/2013 5:53 PM, Sergey Bylokhov wrote:
> Hi, Leonid.
> Does it mean that we cannot use InvokeAndW/Later on the toolkit thread?

In a few words: yes, you can't. Either use InvocationEvent as in this 
fix, or use SunToolkit.postEvent(AppContext, AWTEvent) for events 
received from the underlying platform.

Thanks,

Artem

> On 11.06.2013 12:48, Leonid Romanov wrote:
>> Hi,
>> Please review a fix for 8014264: The applet pathguy_TimeDead throws
>> java.lang.NullPointerException in java console once click drop-down
>> check box.
>> The problem here is that for applets prePostEvent is called within
>> ThreadGroup that, by design, has no AppContext associated with it. So,
>> when the code in XChoicePeer/XListPeer prePostEvent implementation
>> calls EventQueue.invokeLater, it results in NPE because there is no EQ
>> for this ThreadGroup.
>> The fix is not to use invokeLater, but to manually create
>> InvocationEvent to ensure that target's AppContext would be used to
>> find an EQ for the event to go into.
>>
>> Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8014264
>> Webrev: http://cr.openjdk.java.net/~leonidr/8014264/webrev.00/
>> <http://cr.openjdk.java.net/%7Eleonidr/8014264/webrev.00/>
>>
>> Thanks,
>> Leonid.
>>
>
>