Java java.util ArrayList fields, constructors, methods, implement or subclass

Introduction

In this page you can find the methods, fields and constructors for java.util ArrayList.

The text is from its open source code.

Subclass

java.util.ArrayList has subclasses.
Click this link to see all its subclasses.

Field

int	size The size of the ArrayList (the number of elements it contains).

Constructor

	ArrayList() Constructs an empty list with an initial capacity of ten.
	ArrayList(int initialCapacity) Constructs an empty list with the specified initial capacity.
	ArrayList(Collection c) Constructs a list containing the elements of the specified collection, in the order they are returned by the collection's iterator.

Method

boolean	add(E e) Appends the specified element to the end of this list.
void	add(int index, E element) Inserts the specified element at the specified position in this list.
boolean	addAll(Collection 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.
boolean	addAll(int index, Collection c) Inserts all of the elements in the specified collection into this list, starting at the specified position.
void	clear() Removes all of the elements from this list.
Object	clone() Returns a shallow copy of this ArrayList instance.
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.
void	ensureCapacity(int minCapacity) Increases the capacity of this ArrayList instance, if necessary, to ensure that it can hold at least the number of elements specified by the minimum capacity argument.
boolean	equals(Object o)
void	forEach(Consumer action)
E	get(int index) Returns the element at the specified position in this list.
Class	getClass() Returns the runtime class of this Object .
int	hashCode()
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	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	listIterator() Returns a list iterator over the elements in this list (in proper sequence).
ListIterator	listIterator(int index) Returns a list iterator over the elements in this list (in proper sequence), starting at the specified position in the list.
Stream	parallelStream() Returns a possibly parallel Stream with this collection as its source.
E	remove(int index) Removes the element at the specified position in this list.
boolean	remove(Object o) Removes the first occurrence of the specified element from this list, if it is present.
boolean	removeAll(Collection c) Removes from this list all of its elements that are contained in the specified collection.
boolean	removeIf(Predicate filter)
void	replaceAll(UnaryOperator operator)
boolean	retainAll(Collection c) Retains only the elements in this list that are contained in the specified collection.
E	set(int index, E element) Replaces the element at the specified position in this list with the specified element.
void	sort(Comparator c)
Stream	stream() Returns a sequential Stream with this collection as its source.
List	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[]	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.
String	toString() Returns a string representation of the object.
void	trimToSize() Trims the capacity of this ArrayList instance to be the list's current size.