JDK 15 RF(pre)R of JDK-8241374: add Math.absExact

[Brian Burkhalter]

+1

Brian

> On Mar 30, 2020, at 10:53 AM, Joe Darcy <joe.darcy at oracle.com> wrote:
> 
> Updated webrev at:
> 
>     http://cr.openjdk.java.net/~darcy/8241374.1/ <http://cr.openjdk.java.net/~darcy/8241374.1/>
> One of the four pieces of the update to discuss below. A few comments, I added links from the abs methods to its sibling absExact method along with an additional note on referring the differing absExact behavior on a MIN_VALUE argument. I'll reflow the paragraphs and update the copyright year before pushing. Link to the relevant JLS section included in the absExact javadoc.
> 
> […]
> 
> For the StrictMath methods, I include links to the Math equivalent, as the other fooExact StrictMath methods do.
>