What is List Interface In Java ?

Previously we have discussed about

What is Collection Interface In Java ?

Here we learn What is List interface in Java.But Before That you must Know What is Collection Interface in Java ?

Interface List<E>

Type Parameters:

E - the type of elements in this list

All Superinterfaces:

Collection<E>, Iterable<E>

All Known Implementing Classes:

ArrayList, LinkedList, Stack, Vector, AbstractList, AbstractSequentialList, AttributeList, CopyOnWriteArrayList,RoleList, RoleUnresolvedList,

Declaration of List Interface :

public interface List<E> 

extends Collection<E>

List Interface extends Collection .Here E specifies the type of object that the list will hold.

List is an ordered collection and allow duplicate elements as well as multiple null elements. Elements in the list can be inserted or accessed by their positions in the list ,using index and search for elements in the list.

List throw ClassCastException when one object is incompatible with another,or when an incompatible object is add to list.

List also throw IndexOutOfBoundsException if an invalid index is used.

This interface is a member of the Java Collections Framework.

Methods Summary Of List Interface :-

Modifier and Method Name	Description
boolean add(E e)	Appends the specified element to the end of this list (optional operation).
void add(int index, E element)	Inserts the specified element at the specified position in this list (optional operation).
boolean addAll(Collection<? extends E> c)	Appends all of the elements in the specified collection to the end of this list, in the order that they are returned by the specified collection's iterator (optional operation).
bolean addAll(int index, Collection<? extends E> c)	Inserts all of the elements in the specified collection into this list at the specified position (optional operation).
void clear()	Removes all of the elements from this list (optional operation).
boolean contains(Object o)	Returns true if this list contains the specified element.
boolean containsAll(Collection<?> c)	Returns true if this list contains all of the elements of the specified collection.
boolean equals(Object o)	Compares the specified object with this list for equality.
E get(int index)	Returns the element at the specified position in this list.
int hashCode()	Returns the hash code value for this list.
int indexOf(Object o)	Returns the index of the first occurrence of the specified element in this list, or -1 if this list does not contain the element.
boolean isEmpty()	Returns true if this list contains no elements.
Iterator<E> iterator()	Returns an iterator over the elements in this list in proper sequence.
int lastIndexOf(Object o)	Returns the index of the last occurrence of the specified element in this list, or -1 if this list does not contain the element.
ListIterator<E> listIterator()	Returns a list iterator over the elements in this list (in proper sequence).
ListIterator<E> listIterator(int index)	Returns a list iterator over the elements in this list (in proper sequence), starting at the specified position in the list.
E remove(int index)	Removes the element at the specified position in this list (optional operation).
boolean remove(Object o)	Removes the first occurrence of the specified element from this list, if it is present (optional operation).
boolean removeAll(Collection<?> c)	Removes from this list all of its elements that are contained in the specified collection (optional operation).
default void replaceAll(UnaryOperator<E> operator)	Replaces each element of this list with the result of applying the operator to that element.
boolean retainAll(Collection<?> c)	Retains only the elements in this list that are contained in the specified collection (optional operation).
E set(int index, E element)	Replaces the element at the specified position in this list with the specified element (optional operation).
int size()	Returns the number of elements in this list.
default void sort(Comparator<? super E> c)	Sorts this list according to the order induced by the specified Comparator.
default Spliterator<E> spliterator()	Creates a Spliterator over the elements in this list.
List<E> subList(int fromIndex, int toIndex)	Returns a view of the portion of this list between the specified fromIndex, inclusive, and toIndex, exclusive.
Object[] toArray()	Returns an array containing all of the elements in this list in proper sequence (from first to last element).
<T> T[]  toArray(T[] a)	Returns an array containing all of the elements in this list in proper sequence (from first to last element); the runtime type of the returned array is that of the specified array.

      

Blog Author - Pushkar Khosla,
Software Developer by Profession with 3.0 Yrs of Experience , through this blog i'am sharing my industrial Java Knowledge to entire world. For any question or query any one can comment below or mail me at pushkar.itsitm52@gmail.com.

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