Source Code : This program demonstrates the use of static inner classes

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This program demonstrates the use of static inner classes

 
/*
   This program is a part of the companion code for Core Java 8th ed.
   (http://horstmann.com/corejava)

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/**
 * This program demonstrates the use of static inner classes.
 * @version 1.01 2004-02-27
 * @author Cay Horstmann
 */
public class StaticInnerClassTest
{
   public static void main(String[] args)
   {
      double[] d = new double[20];
      for (int i = 0; i < d.length; i++)
         d[i] = 100 * Math.random();
      ArrayAlg.Pair p = ArrayAlg.minmax(d);
      System.out.println("min = " + p.getFirst());
      System.out.println("max = " + p.getSecond());
   }
}

class ArrayAlg
{
   /**
    * A pair of floating-point numbers
    */
   public static class Pair
   {
      /**
       * Constructs a pair from two floating-point numbers
       * @param f the first number
       * @param s the second number
       */
      public Pair(double f, double s)
      {
         first = f;
         second = s;
      }

      /**
       * Returns the first number of the pair
       * @return the first number
       */
      public double getFirst()
      {
         return first;
      }

      /**
       * Returns the second number of the pair
       * @return the second number
       */
      public double getSecond()
      {
         return second;
      }

      private double first;
      private double second;
   }

   /**
    * Computes both the minimum and the maximum of an array
    * @param values an array of floating-point numbers
    * @return a pair whose first element is the minimum and whose second element
    * is the maximum
    */
   public static Pair minmax(double[] values)
   {
      double min = Double.MAX_VALUE;
      double max = Double.MIN_VALUE;
      for (double v : values)
      {
         if (min > v) min = v;
         if (max < v) max = v;
      }
      return new Pair(min, max);
   }
}

   
  

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