Merge pull request #721 from michaelspets/sum-of-multiples719

sum-of-multiples: replace forloop

exercises/sum-of-multiples/src/example/java/SumOfMultiples.java

@@ -1,3 +1,6 @@
+import java.util.Arrays;
+import java.util.stream.IntStream;
+
 public class SumOfMultiples {
     private final int sum;
 
@@ -11,22 +14,9 @@ public class SumOfMultiples {
 
     private int calculateSum(int number, int[] set) {
 
-        int sum = 0;
-        int count = 0;
-
-        for (int i = 1; i < number; i++) {
-
-            for (int j = 0; j < set.length; j++) {
-                if (i % set[j] == 0) {
-                    count++;
-                }
-            }
-
-            if (count > 0) {
-                sum = sum + i;
-                count = 0;
-            }
-        }
+        int sum = IntStream.range(1,number)
+                .filter(i -> Arrays.stream(set).filter(j -> i % j == 0).count() > 0)
+                .sum();
 
         return sum;
     }