On Fri, 10 Jun 2022 09:39:48 GMT, Martin Desruisseaux <[email protected]> wrote:

> `AffineTransform.equals(Object)` and `hashCode()` break two contracts:
> 
> * `A.equals(A)` returns `false` if at least one affine transform coefficient 
> is NaN.
> * `A.equals(B)` should imply `A.hashCode() == B.hashCode()`, but it is not 
> the case if a coefficient is zero with an opposite sign in A and B.
> 
> This patch preserves the current behaviour regarding 0 (i.e. -0 is considered 
> equal to +0) for backward compatibility reason. Instead the `hashCode()` 
> method is updated for being consistent with `equals(Object)` behaviour.

Have you checked all tests ? I did not see it

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PR: https://git.openjdk.org/jdk/pull/9121

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