RFR: 8230648: Replace @exception tag with @throws in java.base

[Pavel Rappo]

Julia,

Trivially update the copyright years and pay attention to not-so-trivial things like:

    8157682: @inheritDoc doesn't work with @exception

I'd suggest comparing "before" and "after" javadoc visually to make sure no funny business is going on.

-Pavel

> On 5 Sep 2019, at 11:40, Julia Boes <julia.boes at oracle.com> wrote:
> 
> Hi,
> 
> This change replaces all occurrences of the @exception tag in java.base with the @throws tag. The tags are synonyms but @throws is the newer preferred option [1].
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8230648
> 
> Webrev: http://corelibs-linux-1.ie.oracle.com/~jboes/webrevs/8230648/webrev.00/
> 
> 
> Regards,
> 
> Julia
> 
> [1] https://docs.oracle.com/javase/7/docs/technotes/tools/windows/javadoc.html#throws
>