Math.round(...) and bug 6430675 (original) (raw)
Brian Burkhalter brian.burkhalter at oracle.com
Sat Feb 2 01:19:43 UTC 2013
- Previous message: Please review JDK-8007428: [launcher] add tools/launcher/FXLauncherTest.java to ProblemList.txt
- Next message: Math.round(...) and bug 6430675
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Hi Jeff,
Based on my tests it looks as if you are correct about the behavior. Would you mind filing an issue so that this may be tracked?
Thanks,
Brian
On Jan 31, 2013, at 1:26 PM, Jeff Hain wrote:
Hi.
Since 6430675 fix, Math.round(float) and Math.round(double) specs no longer specify rounding by adding 0.5 and then using floor, and let the user believe that they "now round up properly". However playing with fresh JDK 7 and 8 versions I saw that these methods still exhibit some suprising results coming from adding 0.5 and then using floor. For example, for odd values in [8388609.0f,16777215.0f] or [-16777215.0f,-8388609.0f], which are mathematical integers, Math.round(float) returns value+1. Shouldn't the references to floor(value+0.5(f/d)) be restored in the specs, or the implementations having a work-around for these cases? -Jeff
- Previous message: Please review JDK-8007428: [launcher] add tools/launcher/FXLauncherTest.java to ProblemList.txt
- Next message: Math.round(...) and bug 6430675
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]