Update StalinSort.java

Author: anant-jain01

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

@@ -1,10 +1,12 @@
 package com.thealgorithms.sorts;
 
-import java.util.Arrays;
-
+/**
+ * @author Anant Jain (https://github.com/anant-jain01)
+ * @see https://medium.com/@kaweendra/the-ultimate-sorting-algorithm-6513d6968420
+ */
 public class StalinSort implements SortAlgorithm {
+
     public <T extends Comparable<T>> T[] sort(T[] array) {
-        validateInput(array);
         int currentIndex = 0;
 
         for (int i = 1; i < array.length; i++) {
@@ -19,12 +21,6 @@ public <T extends Comparable<T>> T[] sort(T[] array) {
         return result;
     }
 
-    private void validateInput(final Comparable<?>[] array) {
-        if (array.length == 0) {
-            throw new IllegalArgumentException("Input array must not be empty.");
-        }
-    }
-
     public static void main(String[] args) {
         Integer[] integers = {4, 23, 6, 78, 1, 54, 231, 9, 12};
         StalinSort stalinSort = new StalinSort();