checkstyle: fix import, adding links

Author: Alex Klymenko

DIRECTORY.md

@@ -865,6 +865,8 @@
             * [CircleSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/CircleSortTest.java)
             * [CocktailShakerSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/CocktailShakerSortTest.java)
             * [CombSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/CombSortTest.java)
+            * [CountingSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/CountingSortTest.java)
+            * [CountingSortUsingStream](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/CountingSortUsingStream.java)
             * [DualPivotQuickSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/DualPivotQuickSortTest.java)
             * [DutchNationalFlagSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/DutchNationalFlagSortTest.java)
             * [ExchangeSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/ExchangeSortTest.java)

src/main/java/com/thealgorithms/sorts/CountingSortUsingStream.java

@@ -1,13 +1,13 @@
 package com.thealgorithms.sorts;
 
+import static java.util.stream.Collectors.toList;
+import static java.util.stream.Collectors.toMap;
+
 import java.util.Arrays;
 import java.util.List;
 import java.util.TreeMap;
 import java.util.stream.IntStream;
 
-import static java.util.stream.Collectors.toList;
-import static java.util.stream.Collectors.toMap;
-
 public class CountingSortUsingStream implements SortAlgorithm {
     @Override
     public <T extends Comparable<T>> T[] sort(T[] array) {