diff --git a/study/COLLECTIONS.MD b/study/COLLECTIONS.MD
index 30f723d..c5048cd 100644
--- a/study/COLLECTIONS.MD
+++ b/study/COLLECTIONS.MD
@@ -25,23 +25,24 @@ All datastructures referenced here can be imported using `import java.util.<stru
 
 ## Methods of the Collection Interface
 
-| Method                      | Description                                         |
-|-----------------------------|-----------------------------------------------------|
-| **public boolean add(E e)** | It is used to insert an element in this collection. |
-| **public boolean addAll(Collection<? extends E> c)** | It is used to insert the specified collection elements in the invoking collection. |
-| **public boolean remove(Object element)** | It is used to delete an element from the collection. || **public boolean removeAll(Collection<?> c)** | It is used to delete all the elements of the specified collection from the invoking collection. |
-| **default boolean removeIf(Predicate<? super E> filter)** | It is used to delete all the elements of the collection that satisfy the specified predicate. |
-| **public boolean retainAll(Collection<?> c)** | It is used to delete all the elements of invoking collection except the specified collection. |
-| **public int size()** | It returns the total number of elements in the collection. |
-| **public void clear()** | It removes the total number of elements from the collection. |
-| **public boolean contains(Object element)** | It is used to search an element. |
-| **public boolean containsAll(Collection<?> c)** | It is used to search the specified collection in the collection. |
-| **public Iterator iterator()** | It returns an iterator. |
-| **public Object[] toArray()** | It converts collection into array. |
-| **public <T> T[] toArray(T[] a)** | It converts collection into array. Here, the runtime type of the returned array is that of the specified array. |
-| **public boolean isEmpty()** | It checks if collection is empty. |
-| **default Stream<E> parallelStream()** | It returns a possibly parallel Stream with the collection as its source. |
-| **default Stream<E> stream()** | It returns a sequential Stream with the collection as its source. |
-| **default Spliterator<E> spliterator()** | It generates a Spliterator over the specified elements in the collection. |
-| **public boolean equals(Object element)** | It matches two collections. |
-| **public int hashCode()** | It returns the hash code number of the collection. |
\ No newline at end of file
+| Method                                                    | Description                                                                                                     |
+|-----------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------|
+| **public boolean add(E e)**                               | It is used to insert an element in this collection.                                                             |
+| **public boolean addAll(Collection<? extends E> c)**      | It is used to insert the specified collection elements in the invoking collection.                              |
+| **public boolean remove(Object element)**                 | It is used to delete an element from the collection.                                                            |
+| **public boolean removeAll(Collection<?> c)**             | It is used to delete all the elements of the specified collection from the invoking collection.                 |
+| **default boolean removeIf(Predicate<? super E> filter)** | It is used to delete all the elements of the collection that satisfy the specified predicate.                   |
+| **public boolean retainAll(Collection<?> c)**             | It is used to delete all the elements of invoking collection except the specified collection.                   |
+| **public int size()**                                     | It returns the total number of elements in the collection.                                                      |
+| **public void clear()**                                   | It removes the total number of elements from the collection.                                                    |
+| **public boolean contains(Object element)**               | It is used to search an element.                                                                                |
+| **public boolean containsAll(Collection<?> c)**           | It is used to search the specified collection in the collection.                                                |
+| **public Iterator iterator()**                            | It returns an iterator.                                                                                         |
+| **public Object[] toArray()**                             | It converts collection into array.                                                                              |
+| **public <T> T[] toArray(T[] a)**                         | It converts collection into array. Here, the runtime type of the returned array is that of the specified array. |
+| **public boolean isEmpty()**                              | It checks if collection is empty.                                                                               |
+| **default Stream<E> parallelStream()**                    | It returns a possibly parallel Stream with the collection as its source.                                        |
+| **default Stream<E> stream()**                            | It returns a sequential Stream with the collection as its source.                                               |
+| **default Spliterator<E> spliterator()**                  | It generates a Spliterator over the specified elements in the collection.                                       |
+| **public boolean equals(Object element)**                 | It matches two collections.                                                                                     |
+| **public int hashCode()**                                 | It returns the hash code number of the collection.                                                              |
\ No newline at end of file