Improve comments, function & class documentation in IndexOfRightMostSetBit.java (#5579)

Author: Hardvan

src/main/java/com/thealgorithms/bitmanipulation/IndexOfRightMostSetBit.java

@@ -1,13 +1,27 @@
 package com.thealgorithms.bitmanipulation;
 
 /**
- * Find The Index Of Right Most SetBit
- * @author Bama Charan Chhandogi (https://github.com/BamaCharanChhandogi)
+ * Utility class for bit manipulation operations.
+ * This class provides methods to work with bitwise operations.
+ * Specifically, it includes a method to find the index of the rightmost set bit
+ * in an integer.
+ * This class is not meant to be instantiated.
+ *
+ * Author: Bama Charan Chhandogi (https://github.com/BamaCharanChhandogi)
  */
-
 public final class IndexOfRightMostSetBit {
+
     private IndexOfRightMostSetBit() {
     }
+
+    /**
+     * Finds the index of the rightmost set bit in the given integer.
+     * The index is zero-based, meaning the rightmost bit has an index of 0.
+     *
+     * @param n the integer to check for the rightmost set bit
+     * @return the index of the rightmost set bit; -1 if there are no set bits
+     *         (i.e., the input integer is 0)
+     */
     public static int indexOfRightMostSetBit(int n) {
         if (n == 0) {
             return -1; // No set bits
@@ -16,7 +30,7 @@ public static int indexOfRightMostSetBit(int n) {
         // Handle negative numbers by finding the two's complement
         if (n < 0) {
             n = -n;
-            n = n & (~n + 1); // Get the rightmost set bit in positive form
+            n = n & (~n + 1); // Isolate the rightmost set bit
         }
 
         int index = 0;