List interface « List « List « Collections

An ordered collection. This interface is a member of the Java Collections Framework.

Add element to List

Return	Method	Summary
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).
boolean	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).

Clear a List

Return	Method	Summary
void	clear()	Removes all of the elements from this list (optional operation).

Does it contain certain element

Return	Method	Summary
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.

Compare two Lists

Return	Method	Summary
boolean	equals(Object o)	Compares the specified object with this list for equality.

Get the element index

Return	Method	Summary
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.
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.

Get the iterator for a List

Return	Method	Summary
Iterator<E>	iterator()	Returns an iterator over the elements in this list in proper sequence.
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 of the elements in this list (in proper sequence), starting at the specified position in this list.

Remove element from List

Return	Method	Summary
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).
boolean	retainAll(Collection<?> c)	Retains only the elements in this list that are contained in the specified collection (optional operation).

Get/set element

Return	Method	Summary
E	get(int index)	Returns the element at the specified position in this list.
E	set(int index, E element)	Replaces the element at the specified position in this list with the specified element (optional operation).

List size and empty flag

Return	Method	Summary
boolean	isEmpty()	Returns true if this list contains no elements.
int	size()	Returns the number of elements in this list.

Get the sub list from a list

Return	Method	Summary
List<E>	subList(int fromIndex, int toIndex)	Returns a view of the portion of this list between the specified fromIndex, inclusive, and toIndex, exclusive.

Convert List to Array

Return	Method	Summary
Object[]	toArray()	Returns an array containing all of the elements in this list.
<T> T[]	toArray(T[] a)	Returns an array containing all of the elements in this list.