Re: [math] Fwd: Re: Change utility class to singleton with interface?

[Mark R. Diggory]

This could be something a simple as:

package org.apache.commons.math.stat2;

import org.apache.commons.math.stat2.univariate.moment.Mean;
import org.apache.commons.math.stat2.univariate.moment.Variance;
public class StatUtils {
  
   private static Mean _mean;
   private static Variance _variance;
  
   public double mean(double[] values) {
       return _mean.evaluate(values);       
   }

   public double variance(double[] values) {
       return _variance.evaluate(values);       
   }
  
   static {
       _mean = new Mean();
       _variance = new Variance();
   }
}

thanks Al,
Mark
Al Chou wrote:

The beginnings of a thread in the Refactoring Yahoo list that may be of
interest for our current design discussions:
Change utility class to singleton with interface?
http://groups.yahoo.com/group/refactoring/message/3797
Al

=====
Albert Davidson Chou
   Get answers to Mac questions at http://www.Mac-Mgrs.org/ .

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