RFR: 8364135: JPEGImageReader.getImageTypes() should throw exception for non-zero image index

[Phil Race]

On Tue, 29 Jul 2025 05:38:00 GMT, Jayathirth D V <jdv at openjdk.org> wrote:

> We need to throw appropriate exception when we pass invalid image index values to ImageReader.getImageTypes().
> We throw IOOBE in all other plugins except JPEG, Added appropriate check to throw IOOBE when JpegImageReader has invalid image index.

src/java.desktop/share/classes/com/sun/imageio/plugins/jpeg/JPEGImageReader.java line 907:

> 905:         if (imageIndex != 0) {
> 906:             throw new IndexOutOfBoundsException("imageIndex != 0!");
> 907:         }

There are JPEG streams with > 1.
And elsewhere we handle it. Look at hasNextImage()

Is this method the sole place where -1 would not throw the right exception ?

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PR Review Comment: https://git.openjdk.org/jdk/pull/26522#discussion_r2240495436