Change access modifier of capacity method to public

Author: euchangxian

src/dataStructures/hashSet/openAddressing/HashSet.java

@@ -19,6 +19,7 @@
  * List<T> toList()             returns a List representation of this HashSet. O(n).
  * int size()                   gets the number of elements (cardinality) in this HashSet. O(1).
  * boolean isEmpty()            checks if the HashSet is empty. O(1).
+ * int capacity()               returns the capacity of this HashSet. O(1).
  *
  * @param <T> the type of objects that are contained within this HashSet. T must override
  *           Object::equals and Object::hashCode for the methods add, remove, and contains to be well-defined.
@@ -152,6 +153,16 @@ public List<T> toList() {
                      .collect(Collectors.toList());
     }
 
+    /**
+     * Returns the number of buckets of this HashSet. Equivalently, returns the maximum number of elements that can
+     * be stored in this HashSet.
+     *
+     * @return the number of buckets of this HashSet.
+     */
+    public int capacity() {
+        return this.buckets.length; // returns the number of buckets.
+    }
+
     /**
      * Hashes the specified element to determine the bucket index for placement within the array.
      * The hash function calculates the index by performing the following steps:
@@ -267,16 +278,6 @@ private boolean isTombstoneBucket(int bucketIndex) {
         return this.TOMBSTONE.equals(this.buckets[bucketIndex]);
     }
 
-    /**
-     * Returns the number of buckets of this HashSet. Equivalently, returns the maximum number of elements that can
-     * be stored in this HashSet.
-     *
-     * @return the number of buckets of this HashSet.
-     */
-    private int capacity() {
-        return this.buckets.length; // returns the number of buckets.
-    }
-
     /**
      * If the load factor is exceeded, the capacity is increased by doubling it (possibly triggered after an add operation),
      * or if the load factor falls below 1/4 (arbitrary) of the capacity (and the capacity is larger than the minimum capacity), the