package api;

 /** Class to simplify arithmetical operations.

  *

  * @author Jaroslav Tulach <jtulach@netbeans.org>

  * @version 1.0

  */

 // BEGIN: design.composition.arith1.0

 public class Arithmetica {

     public int sumTwo(int one, int second) {

         return one + second;

     }

     public int sumAll(int... numbers) {

         if (numbers.length == 0) {

             return 0;

         }

         int sum = numbers[0];

         for (int i = 1; i < numbers.length; i++) {

             sum = sumTwo(sum, numbers[i]);

         }

         return sum;

     }

     public int sumRange(int from, int to) {

         int len = to - from;

         int[] array = new int[len + 1];

         for (int i = 0; i <= len; i++) {

             array[i] = from + i;

         }

         return sumAll(array);

     }

 }

 // END: design.composition.arith1.0