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Re: rounding to .5

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Re: rounding to .5

Subject: Re: rounding to .5
From: Christian Brunschen <email@hidden>
Date: Tue, 5 Jul 2005 14:02:10 +0200 (CEST)

On Tue, 5 Jul 2005, Dev WO wrote:

Hi, I've been searching for a simple way to handle ratings in a WO app: users can only affect integer (1 to 5), and I'd like to provide the overall rating with .5 precision (1, 1.5, 2, ...). I know I can make a method with if 1.25 < overallRating < 1.76 then overallRating = 1.5, etc but I was wondering if there's any built-in java method for rounding to .5. I red the Math API and looked at the rounding modes, but it doesn't look like what I need... Is there something more "direct" to do the .5 rounding than the if... method?


How about

  double rounded = Math.round(2.0 * original) / 2.0;

This will round '2.0 * original' to the nearest integer, and by dividing that by 2,.0 you get your original value, rounded to the learest half 0.5

Thanks:)


Best wishes,

Xavier


// Christian
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