jtulach@17: package api;
jtulach@17: 
jtulach@17: /** Class to simplify arithmetical operations.
jtulach@17:  *
jtulach@17:  * @author Jaroslav Tulach <jtulach@netbeans.org>
jtulach@20:  * @version 1.0
jtulach@17:  */
jtulach@21: // BEGIN: design.composition.arith1.0
jtulach@17: public class Arithmetica {
jtulach@17:     public int sumTwo(int one, int second) {
jtulach@17:         return one + second;
jtulach@17:     }
jtulach@17:     
jtulach@17:     public int sumAll(int... numbers) {
jtulach@187:         if (numbers.length == 0) {
jtulach@187:             return 0;
jtulach@187:         }
jtulach@17:         int sum = numbers[0];
jtulach@17:         for (int i = 1; i < numbers.length; i++) {
jtulach@17:             sum = sumTwo(sum, numbers[i]);
jtulach@17:         }
jtulach@17:         return sum;
jtulach@17:     }
jtulach@17:     
jtulach@17:     public int sumRange(int from, int to) {
jtulach@17:         int len = to - from;
jtulach@210:         if (len < 0) {
jtulach@210:             len = -len;
jtulach@210:             from = to;
jtulach@210:         }
jtulach@17:         int[] array = new int[len + 1];
jtulach@17:         for (int i = 0; i <= len; i++) {
jtulach@17:             array[i] = from + i;
jtulach@17:         }
jtulach@17:         return sumAll(array);
jtulach@17:     }
jtulach@17: }
jtulach@21: // END: design.composition.arith1.0