ArrayList

java.lang.Object
- java.util.AbstractCollection<E>
- - java.util.AbstractList<E>
  - - java.util.ArrayList<E>

所有已实现的接口:

Serializable, Cloneable, Iterable<E>, Collection<E>, List<E>, RandomAccess
```
public class ArrayList<E>
extends AbstractList<E>
implements List<E>, RandomAccess, Cloneable, Serializable
```
Resizable-array implementation of the List interface. Implements all optional list operations, and permits all elements, including null. In addition to implementing the List interface, this class provides methods to manipulate the size of the array that is used internally to store the list. (This class is roughly equivalent to Vector, except that it is unsynchronized.)
The size, isEmpty, get, set, iterator, and listIterator operations run in constant time. The add operation runs in amortized constant time, that is, adding n elements requires O(n) time. All of the other operations run in linear time (roughly speaking). The constant factor is low compared to that for the LinkedList implementation.
Each ArrayList instance has a capacity. The capacity is the size of the array used to store the elements in the list. It is always at least as large as the list size. As elements are added to an ArrayList, its capacity grows automatically. The details of the growth policy are not specified beyond the fact that adding an element has constant amortized time cost.
An application can increase the capacity of an ArrayList instance before adding a large number of elements using the ensureCapacity operation. This may reduce the amount of incremental reallocation.
Note that this implementation is not synchronized. If multiple threads access an ArrayList instance concurrently, and at least one of the threads modifies the list structurally, it must be synchronized externally. (A structural modification is any operation that adds or deletes one or more elements, or explicitly resizes the backing array; merely setting the value of an element is not a structural modification.) This is typically accomplished by synchronizing on some object that naturally encapsulates the list. If no such object exists, the list should be "wrapped" using the Collections#synchronizedList method. This is best done at creation time, to prevent accidental unsynchronized access to the list:
```
   List list = Collections.synchronizedList(new ArrayList(...));
```
The iterators returned by this class's iterator and listIterator methods are fail-fast: if the list is structurally modified at any time after the iterator is created, in any way except through the iterator's own ListIterator#remove() or ListIterator#add(Object) methods, the iterator will throw a ConcurrentModificationException. Thus, in the face of concurrent modification, the iterator fails quickly and cleanly, rather than risking arbitrary, non-deterministic behavior at an undetermined time in the future.
Note that the fail-fast behavior of an iterator cannot be guaranteed as it is, generally speaking, impossible to make any hard guarantees in the presence of unsynchronized concurrent modification. Fail-fast iterators throw ConcurrentModificationException on a best-effort basis. Therefore, it would be wrong to write a program that depended on this exception for its correctness: the fail-fast behavior of iterators should be used only to detect bugs.
This class is a member of the Java Collections Framework.
从以下版本开始:

1.2

另请参阅:

Collection, List, LinkedList, Vector, 序列化表格

字段概要
- 从类继承的字段 java.util.AbstractList
  modCount

构造器概要

构造器
构造器	说明
`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<? extends E> c)`	Constructs a list containing the elements of the specified collection, in the order they are returned by the collection's iterator.

方法概要

所有方法实例方法具体方法
限定符和类型	方法	说明
`void`	`add(int index, E element)`	Inserts the specified element at the specified position in this list.
`boolean`	`add(E e)`	Appends the specified element to the end of this list.
`boolean`	`addAll(int index, Collection<? extends E> c)`	Inserts all of the elements in the specified collection into this list, starting at the specified position.
`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.
`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.
`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.
`void`	`forEach(Consumer<? super E> action)`	Performs the given action for each element of the `Iterable` until all elements have been processed or the action throws an exception.
`E`	`get(int index)`	Returns the element at the specified position in 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.
`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<? super E> filter)`	Removes all of the elements of this collection that satisfy the given predicate.
`protected void`	`removeRange(int fromIndex, int toIndex)`	Removes from this list all of the elements whose index is between `fromIndex`, inclusive, and `toIndex`, exclusive.
`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.
`E`	`set(int index, E element)`	Replaces the element at the specified position in this list with the specified element.
`int`	`size()`	Returns the number of elements in this list.
`void`	`sort(Comparator<? super E> c)`	Sorts this list according to the order induced by the specified `Comparator`.
`Spliterator<E>`	`spliterator()`	Creates a late-binding and fail-fast `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.
`void`	`trimToSize()`	Trims the capacity of this `ArrayList` instance to be the list's current size.

从类继承的方法 java.util.AbstractCollection
containsAll, toString

从类继承的方法 java.util.AbstractList
equals, hashCode

从接口继承的方法 java.util.Collection
parallelStream, stream

从接口继承的方法 java.util.List
containsAll, equals, hashCode

从类继承的方法 java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait

- 构造器详细资料
  - ArrayList
```
public ArrayList(int initialCapacity)
```
    Constructs an empty list with the specified initial capacity.
    
    参数:
    
    initialCapacity - the initial capacity of the list
    
    抛出:
    
    IllegalArgumentException - if the specified initial capacity is negative
  - ArrayList
```
public ArrayList()
```
    Constructs an empty list with an initial capacity of ten.
  - ArrayList
```
public ArrayList(Collection<? extends E> c)
```
    Constructs a list containing the elements of the specified collection, in the order they are returned by the collection's iterator.
    
    参数:
    
    c - the collection whose elements are to be placed into this list
    
    抛出:
    
    NullPointerException - if the specified collection is null
- 方法详细资料
  - trimToSize
```
public void trimToSize()
```
    Trims the capacity of this ArrayList instance to be the list's current size. An application can use this operation to minimize the storage of an ArrayList instance.
  - ensureCapacity
```
public 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.
    
    参数:
    
    minCapacity - the desired minimum capacity
  - size
```
public int size()
```
    Returns the number of elements in this list.
    
    指定者:
    
    size 在接口中 Collection<E>
    
    指定者:
    
    size 在接口中 List<E>
    
    指定者:
    
    size 在类中 AbstractCollection<E>
    
    返回:
    
    the number of elements in this list
  - isEmpty
```
public boolean isEmpty()
```
    Returns true if this list contains no elements.
    
    指定者:
    
    isEmpty 在接口中 Collection<E>
    
    指定者:
    
    isEmpty 在接口中 List<E>
    
    覆盖:
    
    isEmpty 在类中 AbstractCollection<E>
    
    返回:
    
    true if this list contains no elements
  - contains
```
public boolean contains(Object o)
```
    Returns true if this list contains the specified element. More formally, returns true if and only if this list contains at least one element e such that (o==null ? e==null : o.equals(e)).
    
    指定者:
    
    contains 在接口中 Collection<E>
    
    指定者:
    
    contains 在接口中 List<E>
    
    覆盖:
    
    contains 在类中 AbstractCollection<E>
    
    参数:
    
    o - element whose presence in this list is to be tested
    
    返回:
    
    true if this list contains the specified element
  - indexOf
```
public 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. More formally, returns the lowest index i such that (o==null ? get(i)==null : o.equals(get(i))), or -1 if there is no such index.
    
    指定者:
    
    indexOf 在接口中 List<E>
    
    覆盖:
    
    indexOf 在类中 AbstractList<E>
    
    参数:
    
    o - element to search for
    
    返回:
    
    the index of the first occurrence of the specified element in this list, or -1 if this list does not contain the element
  - lastIndexOf
```
public 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. More formally, returns the highest index i such that (o==null ? get(i)==null : o.equals(get(i))), or -1 if there is no such index.
    
    指定者:
    
    lastIndexOf 在接口中 List<E>
    
    覆盖:
    
    lastIndexOf 在类中 AbstractList<E>
    
    参数:
    
    o - element to search for
    
    返回:
    
    the index of the last occurrence of the specified element in this list, or -1 if this list does not contain the element
  - clone
```
public Object clone()
```
    Returns a shallow copy of this ArrayList instance. (The elements themselves are not copied.)
    
    覆盖:
    
    clone 在类中 Object
    
    返回:
    
    a clone of this ArrayList instance
    
    另请参阅:
    
    Cloneable
  - toArray
```
public Object[] toArray()
```
    Returns an array containing all of the elements in this list in proper sequence (from first to last element).
    The returned array will be "safe" in that no references to it are maintained by this list. (In other words, this method must allocate a new array). The caller is thus free to modify the returned array.
    This method acts as bridge between array-based and collection-based APIs.
    
    指定者:
    
    toArray 在接口中 Collection<E>
    
    指定者:
    
    toArray 在接口中 List<E>
    
    覆盖:
    
    toArray 在类中 AbstractCollection<E>
    
    返回:
    
    an array containing all of the elements in this list in proper sequence
    
    另请参阅:
    
    Arrays.asList(Object[])
  - toArray
```
public <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. If the list fits in the specified array, it is returned therein. Otherwise, a new array is allocated with the runtime type of the specified array and the size of this list.
    If the list fits in the specified array with room to spare (i.e., the array has more elements than the list), the element in the array immediately following the end of the collection is set to null. (This is useful in determining the length of the list only if the caller knows that the list does not contain any null elements.)
    
    指定者:
    
    toArray 在接口中 Collection<E>
    
    指定者:
    
    toArray 在接口中 List<E>
    
    覆盖:
    
    toArray 在类中 AbstractCollection<E>
    
    类型参数:
    
    T - the runtime type of the array to contain the collection
    
    参数:
    
    a - the array into which the elements of the list are to be stored, if it is big enough; otherwise, a new array of the same runtime type is allocated for this purpose.
    
    返回:
    
    an array containing the elements of the list
    
    抛出:
    
    ArrayStoreException - if the runtime type of the specified array is not a supertype of the runtime type of every element in this list
    
    NullPointerException - if the specified array is null
  - get
```
public E get(int index)
```
    Returns the element at the specified position in this list.
    
    指定者:
    
    get 在接口中 List<E>
    
    指定者:
    
    get 在类中 AbstractList<E>
    
    参数:
    
    index - index of the element to return
    
    返回:
    
    the element at the specified position in this list
    
    抛出:
    
    IndexOutOfBoundsException - if the index is out of range (index < 0 || index >= size())
  - set
```
public E set(int index,
             E element)
```
    Replaces the element at the specified position in this list with the specified element.
    
    指定者:
    
    set 在接口中 List<E>
    
    覆盖:
    
    set 在类中 AbstractList<E>
    
    参数:
    
    index - index of the element to replace
    
    element - element to be stored at the specified position
    
    返回:
    
    the element previously at the specified position
    
    抛出:
    
    IndexOutOfBoundsException - if the index is out of range (index < 0 || index >= size())
  - add
```
public boolean add(E e)
```
    Appends the specified element to the end of this list.
    
    指定者:
    
    add 在接口中 Collection<E>
    
    指定者:
    
    add 在接口中 List<E>
    
    覆盖:
    
    add 在类中 AbstractList<E>
    
    参数:
    
    e - element to be appended to this list
    
    返回:
    
    true (as specified by Collection#add)
  - add
```
public void add(int index,
                E element)
```
    Inserts the specified element at the specified position in this list. Shifts the element currently at that position (if any) and any subsequent elements to the right (adds one to their indices).
    
    指定者:
    
    add 在接口中 List<E>
    
    覆盖:
    
    add 在类中 AbstractList<E>
    
    参数:
    
    index - index at which the specified element is to be inserted
    
    element - element to be inserted
    
    抛出:
    
    IndexOutOfBoundsException - if the index is out of range (index < 0 || index > size())
  - remove
```
public E remove(int index)
```
    Removes the element at the specified position in this list. Shifts any subsequent elements to the left (subtracts one from their indices).
    
    指定者:
    
    remove 在接口中 List<E>
    
    覆盖:
    
    remove 在类中 AbstractList<E>
    
    参数:
    
    index - the index of the element to be removed
    
    返回:
    
    the element that was removed from the list
    
    抛出:
    
    IndexOutOfBoundsException - if the index is out of range (index < 0 || index >= size())
  - remove
```
public boolean remove(Object o)
```
    Removes the first occurrence of the specified element from this list, if it is present. If the list does not contain the element, it is unchanged. More formally, removes the element with the lowest index i such that (o==null ? get(i)==null : o.equals(get(i))) (if such an element exists). Returns true if this list contained the specified element (or equivalently, if this list changed as a result of the call).
    
    指定者:
    
    remove 在接口中 Collection<E>
    
    指定者:
    
    remove 在接口中 List<E>
    
    覆盖:
    
    remove 在类中 AbstractCollection<E>
    
    参数:
    
    o - element to be removed from this list, if present
    
    返回:
    
    true if this list contained the specified element
  - clear
```
public void clear()
```
    Removes all of the elements from this list. The list will be empty after this call returns.
    
    指定者:
    
    clear 在接口中 Collection<E>
    
    指定者:
    
    clear 在接口中 List<E>
    
    覆盖:
    
    clear 在类中 AbstractList<E>
  - addAll
```
public 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. The behavior of this operation is undefined if the specified collection is modified while the operation is in progress. (This implies that the behavior of this call is undefined if the specified collection is this list, and this list is nonempty.)
    
    指定者:
    
    addAll 在接口中 Collection<E>
    
    指定者:
    
    addAll 在接口中 List<E>
    
    覆盖:
    
    addAll 在类中 AbstractCollection<E>
    
    参数:
    
    c - collection containing elements to be added to this list
    
    返回:
    
    true if this list changed as a result of the call
    
    抛出:
    
    NullPointerException - if the specified collection is null
    
    另请参阅:
    
    AbstractCollection.add(Object)
  - addAll
```
public boolean addAll(int index,
                      Collection<? extends E> c)
```
    Inserts all of the elements in the specified collection into this list, starting at the specified position. Shifts the element currently at that position (if any) and any subsequent elements to the right (increases their indices). The new elements will appear in the list in the order that they are returned by the specified collection's iterator.
    
    指定者:
    
    addAll 在接口中 List<E>
    
    覆盖:
    
    addAll 在类中 AbstractList<E>
    
    参数:
    
    index - index at which to insert the first element from the specified collection
    
    c - collection containing elements to be added to this list
    
    返回:
    
    true if this list changed as a result of the call
    
    抛出:
    
    IndexOutOfBoundsException - if the index is out of range (index < 0 || index > size())
    
    NullPointerException - if the specified collection is null
  - removeRange
```
protected void removeRange(int fromIndex,
                           int toIndex)
```
    Removes from this list all of the elements whose index is between fromIndex, inclusive, and toIndex, exclusive. Shifts any succeeding elements to the left (reduces their index). This call shortens the list by (toIndex - fromIndex) elements. (If toIndex==fromIndex, this operation has no effect.)
    
    覆盖:
    
    removeRange 在类中 AbstractList<E>
    
    参数:
    
    fromIndex - index of first element to be removed
    
    toIndex - index after last element to be removed
    
    抛出:
    
    IndexOutOfBoundsException - if fromIndex or toIndex is out of range (fromIndex < 0 || fromIndex >= size() || toIndex > size() || toIndex < fromIndex)
  - removeAll
```
public boolean removeAll(Collection<?> c)
```
    Removes from this list all of its elements that are contained in the specified collection.
    
    指定者:
    
    removeAll 在接口中 Collection<E>
    
    指定者:
    
    removeAll 在接口中 List<E>
    
    覆盖:
    
    removeAll 在类中 AbstractCollection<E>
    
    参数:
    
    c - collection containing elements to be removed from this list
    
    返回:
    
    true if this list changed as a result of the call
    
    抛出:
    
    ClassCastException - if the class of an element of this list is incompatible with the specified collection (optional)
    
    NullPointerException - if this list contains a null element and the specified collection does not permit null elements (optional), or if the specified collection is null
    
    另请参阅:
    
    Collection.contains(Object)
  - retainAll
```
public boolean retainAll(Collection<?> c)
```
    Retains only the elements in this list that are contained in the specified collection. In other words, removes from this list all of its elements that are not contained in the specified collection.
    
    指定者:
    
    retainAll 在接口中 Collection<E>
    
    指定者:
    
    retainAll 在接口中 List<E>
    
    覆盖:
    
    retainAll 在类中 AbstractCollection<E>
    
    参数:
    
    c - collection containing elements to be retained in this list
    
    返回:
    
    true if this list changed as a result of the call
    
    抛出:
    
    ClassCastException - if the class of an element of this list is incompatible with the specified collection (optional)
    
    NullPointerException - if this list contains a null element and the specified collection does not permit null elements (optional), or if the specified collection is null
    
    另请参阅:
    
    Collection.contains(Object)
  - listIterator
```
public 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. The specified index indicates the first element that would be returned by an initial call to ListIterator#next. An initial call to ListIterator#previous would return the element with the specified index minus one.
    The returned list iterator is fail-fast.
    
    指定者:
    
    listIterator 在接口中 List<E>
    
    覆盖:
    
    listIterator 在类中 AbstractList<E>
    
    参数:
    
    index - index of the first element to be returned from the list iterator (by a call to ListIterator#next)
    
    返回:
    
    a list iterator over the elements in this list (in proper sequence), starting at the specified position in the list
    
    抛出:
    
    IndexOutOfBoundsException - if the index is out of range (index < 0 || index > size())
  - listIterator
```
public ListIterator<E> listIterator()
```
    Returns a list iterator over the elements in this list (in proper sequence).
    The returned list iterator is fail-fast.
    
    指定者:
    
    listIterator 在接口中 List<E>
    
    覆盖:
    
    listIterator 在类中 AbstractList<E>
    
    返回:
    
    a list iterator over the elements in this list (in proper sequence)
    
    另请参阅:
    
    listIterator(int)
  - iterator
```
public Iterator<E> iterator()
```
    Returns an iterator over the elements in this list in proper sequence.
    The returned iterator is fail-fast.
    
    指定者:
    
    iterator 在接口中 Collection<E>
    
    指定者:
    
    iterator 在接口中 Iterable<E>
    
    指定者:
    
    iterator 在接口中 List<E>
    
    覆盖:
    
    iterator 在类中 AbstractList<E>
    
    返回:
    
    an iterator over the elements in this list in proper sequence
  - subList
```
public List<E> subList(int fromIndex,
                       int toIndex)
```
    Returns a view of the portion of this list between the specified fromIndex, inclusive, and toIndex, exclusive. (If fromIndex and toIndex are equal, the returned list is empty.) The returned list is backed by this list, so non-structural changes in the returned list are reflected in this list, and vice-versa. The returned list supports all of the optional list operations.
    This method eliminates the need for explicit range operations (of the sort that commonly exist for arrays). Any operation that expects a list can be used as a range operation by passing a subList view instead of a whole list. For example, the following idiom removes a range of elements from a list:
```
      list.subList(from, to).clear();
 
```
    Similar idioms may be constructed for indexOf(java.lang.Object) and lastIndexOf(java.lang.Object), and all of the algorithms in the Collections class can be applied to a subList.
    The semantics of the list returned by this method become undefined if the backing list (i.e., this list) is structurally modified in any way other than via the returned list. (Structural modifications are those that change the size of this list, or otherwise perturb it in such a fashion that iterations in progress may yield incorrect results.)
    指定者:
    
    subList 在接口中 List<E>
    
    覆盖:
    
    subList 在类中 AbstractList<E>
    
    参数:
    
    fromIndex - low endpoint (inclusive) of the subList
    
    toIndex - high endpoint (exclusive) of the subList
    
    返回:
    
    a view of the specified range within this list
    
    抛出:
    
    IndexOutOfBoundsException - if an endpoint index value is out of range (fromIndex < 0 || toIndex > size)
    
    IllegalArgumentException - if the endpoint indices are out of order (fromIndex > toIndex)
  - forEach
```
public void forEach(Consumer<? super E> action)
```
    从接口复制的说明: Iterable
    
    Performs the given action for each element of the Iterable until all elements have been processed or the action throws an exception. Unless otherwise specified by the implementing class, actions are performed in the order of iteration (if an iteration order is specified). Exceptions thrown by the action are relayed to the caller.
    
    指定者:
    
    forEach 在接口中 Iterable<E>
    
    参数:
    
    action - The action to be performed for each element
  - spliterator
```
public Spliterator<E> spliterator()
```
    Creates a late-binding and fail-fast Spliterator over the elements in this list.
    The Spliterator reports Spliterator#SIZED, Spliterator#SUBSIZED, and Spliterator#ORDERED. Overriding implementations should document the reporting of additional characteristic values.
    
    指定者:
    
    spliterator 在接口中 Collection<E>
    
    指定者:
    
    spliterator 在接口中 Iterable<E>
    
    指定者:
    
    spliterator 在接口中 List<E>
    
    返回:
    
    a Spliterator over the elements in this list
    
    从以下版本开始:
    
    1.8
  - removeIf
```
public boolean removeIf(Predicate<? super E> filter)
```
    从接口复制的说明: Collection
    
    Removes all of the elements of this collection that satisfy the given predicate. Errors or runtime exceptions thrown during iteration or by the predicate are relayed to the caller.
    
    指定者:
    
    removeIf 在接口中 Collection<E>
    
    参数:
    
    filter - a predicate which returns true for elements to be removed
    
    返回:
    
    true if any elements were removed
  - replaceAll
```
public void replaceAll(UnaryOperator<E> operator)
```
    从接口复制的说明: List
    
    Replaces each element of this list with the result of applying the operator to that element. Errors or runtime exceptions thrown by the operator are relayed to the caller.
    
    指定者:
    
    replaceAll 在接口中 List<E>
    
    参数:
    
    operator - the operator to apply to each element
  - sort
```
public void sort(Comparator<? super E> c)
```
    从接口复制的说明: List
    
    Sorts this list according to the order induced by the specified Comparator.
    All elements in this list must be mutually comparable using the specified comparator (that is, c.compare(e1, e2) must not throw a ClassCastException for any elements e1 and e2 in the list).
    If the specified comparator is null then all elements in this list must implement the Comparable interface and the elements' Comparable should be used.
    This list must be modifiable, but need not be resizable.
    
    指定者:
    
    sort 在接口中 List<E>
    
    参数:
    
    c - the Comparator used to compare list elements. A null value indicates that the elements' Comparable should be used

类 ArrayList<E>

字段概要

从类继承的字段 java.util.AbstractList

构造器概要

方法概要

从类继承的方法 java.util.AbstractCollection

从类继承的方法 java.util.AbstractList

从接口继承的方法 java.util.Collection

从接口继承的方法 java.util.List

从类继承的方法 java.lang.Object

构造器详细资料

ArrayList

ArrayList

ArrayList

方法详细资料

trimToSize

ensureCapacity

size

isEmpty

contains

indexOf

lastIndexOf

clone

toArray

toArray

get

set

add

add

remove

remove

clear

addAll

addAll

removeRange

removeAll

retainAll

listIterator

listIterator

iterator

subList

forEach

spliterator

removeIf

replaceAll

sort