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

[Prasanta Sadhukhan]

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

I would rather keep this PR simple just to replace @exception with @throws. Other anomalies/idiosyncracies can be tackled in separate issue, if you dont mind.

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