RFR: 6201035: Document NPE for passing null insets to constructors and methods of several Border classes [v4]

[Prasanta Sadhukhan]

On Fri, 28 Oct 2022 03:42:05 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

>> The behavior of MatteBorder constructors taking Insets object as a parameter is undocumented. It would throw NPE if null object is passed to it, which should be documented in the spec.
>
> Prasanta Sadhukhan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Review fix

Changed subject and added more border classes/methods

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PR: https://git.openjdk.org/jdk/pull/10740