RFR: 8282473: Refactor swing classes javadoc to use @throws instead of @exception

[Phil Race]

On Tue, 1 Mar 2022 10:16:16 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

> Prevailing JDK coding practices use "@throws" rather than "@exception".
> Refactor existing swing classes javadoc to use @throws

This is touching a lot of files but I can't see it interfering with clean backports as we are very unlikely to touch lines in javadoc of SE API in backports !
And of course by implication, this fix is not one that would/should be backported.

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Marked as reviewed by prr (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/7644