diff --git a/core-java/src/main/java/com/baeldung/array/SumAndAverageInArray.java b/core-java/src/main/java/com/baeldung/array/SumAndAverageInArray.java
index da64c5e9a7b8..49df5ba986f4 100644
--- a/core-java/src/main/java/com/baeldung/array/SumAndAverageInArray.java
+++ b/core-java/src/main/java/com/baeldung/array/SumAndAverageInArray.java
@@ -16,6 +16,10 @@ public static int findSumUsingStream(int[] array) {
         return Arrays.stream(array).sum();
     }
 
+    public static int findSumUsingStream(Integer[] array) {
+        return Arrays.stream(array).mapToInt(Integer::intValue).sum();
+    }
+
     public static double findAverageWithoutUsingStream(int[] array) {
         int sum = findSumWithoutUsingStream(array);
         return (double) sum / array.length;
diff --git a/core-java/src/test/java/com/baeldung/array/SumAndAverageInArrayTest.java b/core-java/src/test/java/com/baeldung/array/SumAndAverageInArrayTest.java
index 5597dbd5423f..208075cb57aa 100644
--- a/core-java/src/test/java/com/baeldung/array/SumAndAverageInArrayTest.java
+++ b/core-java/src/test/java/com/baeldung/array/SumAndAverageInArrayTest.java
@@ -21,6 +21,15 @@ public void givenAnIntArray_whenUsingStream_thenFindSum() {
         Assert.assertEquals(expectedSumOfArray, actualSumOfArray);
     }
 
+    @Test
+    public void givenAnBoxedIntegerArray_whenUsingStream_thenFindSum() {
+        Integer[] array = new Integer[]{1, 3, 4, 8, 19, 20};
+        int expectedSumOfArray = 55;
+        int actualSumOfArray = SumAndAverageInArray.findSumUsingStream(array);
+
+        Assert.assertEquals(expectedSumOfArray, actualSumOfArray);
+    }
+
     @Test
     public void givenAnIntArray_whenNotUsingStream_thenFindAverage() {
         int[] array = { 1, 3, 4, 8, 19, 20 };