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com.hfg xml, html, svg, and bioinformatics utility library
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package com.hfg.util;


import java.util.Random;

//------------------------------------------------------------------------------
/**
 Functions to use with primitive arrays.

 @author J. Alex Taylor, hairyfatguy.com
 */
//------------------------------------------------------------------------------
// com.hfg XML/HTML Coding Library
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// J. Alex Taylor, President, Founder, CEO, COO, CFO, OOPS hairyfatguy.com
// [email protected]
//------------------------------------------------------------------------------

public class ArrayUtil
{
   //---------------------------------------------------------------------------
   /**
    Simple shuffle using the Fisher-Yates method.
    * @param inArray primitive int array
    */
   public static void shuffle(int[] inArray)
   {
      int index;
      int temp;
      Random random = new Random();
      for (int i = inArray.length - 1; i > 0; i--)
      {
         index = random.nextInt(i + 1);
         // Swap values
         temp         = inArray[index];
         inArray[index] = inArray[i];
         inArray[i]     = temp;
      }
   }

   //---------------------------------------------------------------------------
   /**
    Simple shuffle using the Fisher-Yates method.
    * @param inArray primitive float array
    */
   public static void shuffle(float[] inArray)
   {
      int   index;
      float temp;
      Random random = new Random();
      for (int i = inArray.length - 1; i > 0; i--)
      {
         index = random.nextInt(i + 1);
         // Swap values
         temp         = inArray[index];
         inArray[index] = inArray[i];
         inArray[i]     = temp;
      }
   }

   //---------------------------------------------------------------------------
   /**
    Simple shuffle using the Fisher-Yates method.
    * @param inArray primitive char array
    */
   public static void shuffle(char[] inArray)
   {
      int   index;
      char temp;
      Random random = new Random();
      for (int i = inArray.length - 1; i > 0; i--)
      {
         index = random.nextInt(i + 1);
         // Swap values
         temp         = inArray[index];
         inArray[index] = inArray[i];
         inArray[i]     = temp;
      }
   }
}