<AWT Dev> [9] Review Request: 6815345 java.awt.Component.createImage(int width, int height) should remove behavioral optionality

Semyon Sadetsky semyon.sadetsky at oracle.com
Thu Sep 24 12:58:46 UTC 2015

On 9/24/2015 3:25 PM, Sergey Bylokhov wrote:
> On 24.09.15 11:36, Semyon Sadetsky wrote:
>> Hi Sergey,
>>   isHeadless()=true must return null. If so please add the corresponding
>> test case. It is not not obvious from the code.
> isHeadless()=true is headless mode where the frames are always not 
> displayable, so everything is similar to the current test except that 
> in headless the pack() will be throw an exception and second part of 
> the test in this mode is unnecessary.
Then maybe simply do not call pack() for the headless test?
Okay, let me rephrase what I meant. Since isHeadless()=true case is 
mentioned in those 3 specs so explicitly it must be guarantied that the 
specified behavior works for the case as described.  I cannot trace the 
result by reading the code of the createImage(), isHeadless() method is 
not even called there.  So the test case should be added. Or you could 
remove isHeadless() references from the specs. Or write something like 
"the result is non-deterministic if isHeadless() is not false..."
>> --Semyon
>> On 9/23/2015 9:14 PM, Sergey Bylokhov wrote:
>>> Hello.
>>> Please review the fix for jdk9.
>>> The specification is updated as suggested in JDK-6186530 and
>>> JDK-6815345. The test is added to prove that we always return null
>>> when the component is not displayable.
>>> ccc request will be created after the technical review. One additional
>>> bug filed https://bugs.openjdk.java.net/browse/JDK-8137047
>>> Bug: https://bugs.openjdk.java.net/browse/JDK-6815345
>>> Webrev can be found at:
>>> http://cr.openjdk.java.net/~serb/6815345/webrev.04

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