fix bubble sort

algorithms/src/main/java/com/baeldung/algorithms/bubblesort/BubbleSort.java

@@ -7,7 +7,7 @@ public class BubbleSort {
     void bubbleSort(Integer[] arr) {
         int n = arr.length;
         IntStream.range(0, n - 1)
-          .flatMap(i -> IntStream.range(i + 1, n - i))
+          .flatMap(i -> IntStream.range(1, n - i))
           .forEach(j -> {
               if (arr[j - 1] > arr[j]) {
                   int temp = arr[j];

algorithms/src/test/java/com/baeldung/algorithms/bubblesort/BubbleSortUnitTest.java

@@ -1,8 +1,8 @@
 package com.baeldung.algorithms.bubblesort;
 
-import static org.junit.Assert.*;
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 public class BubbleSortUnitTest {