Integrated: 8159055: Clarify handling of null and invalid image data for ImageIcon constructors and setImage method

[Prasanta Sadhukhan]

On Thu, 12 Jun 2025 03:23:30 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

> When trying to call 'icon.setImage(null);' where 'icon' is an instance of ImageIcon, a null pointer exception is thrown at runtime.
> The code tried to get the `id` for that image and instantiates `MediaTracker` to associate the null image to that `id` and checks the status of loading this null image, removes the null image from the tracker and then tries to get the image width where it throws NPE as image is null.
> 
> It's better to not go through all MediaTracker usage and bail out initially itself for null image..

This pull request has now been integrated.

Changeset: 98e64cff
Author:    Prasanta Sadhukhan <psadhukhan at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/98e64cffff24ec8b8abeb7afd121e58bc53ed034
Stats:     165 lines in 2 files changed: 165 ins; 0 del; 0 mod

8159055: Clarify handling of null and invalid image data for ImageIcon constructors and setImage method

Reviewed-by: aivanov, prr, abhiscxk, kizune, serb

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PR: https://git.openjdk.org/jdk/pull/25767