RFR 8252537: Replace @exception with @throws for core-libs

[Pavel Rappo]

Oops, wrong issue number. Here's the correct one: JDK-8157682.

> On 4 Sep 2020, at 09:52, Pavel Rappo <pavel.rappo at oracle.com> wrote:
> 
> It would be nice to compare documentation HTML files generated before and after that patch: there's a possibility of non-local consequences, see JDK-6509045.
> 
> -Pavel
> 
>> On 3 Sep 2020, at 20:33, Vipin Sharma <vipinsharma85 at gmail.com> wrote:
>> 
>> Hi,
>> 
>> Please review and sponsor the fix for replacing @exception with @throws for
>> core-libs.
>> 
>> Issue: https://bugs.openjdk.java.net/browse/JDK-8252537
>> Webrev: https://cr.openjdk.java.net/~vsharma/8252537
>> 
>> As suggested in the previous discussion
>> <https://mail.openjdk.java.net/pipermail/core-libs-dev/2020-September/068486.html>,
>> this webrev has a consolidated fix for all subtasks of the JDK-8252536
>> <https://bugs.openjdk.java.net/browse/JDK-8252536>.
>> There is no change in the indentation as part of this webrev.
>> 
>> Regards,
>> Vipin
>