public abstract class java.util
AbstractSequentialList<E>


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Java SE 6
  
Extends: AbstractCollection > AbstractList
Extended by: LinkedList
Details
This class provides a skeletal implementation of the List interface to minimize the effort required to implement this interface backed by a "sequential access" data store (such as a linked list). For random access data (such as an array), AbstractList should be used in preference to this class.

This class is the opposite of the AbstractList class in the sense that it implements the "random access" methods (get(int index), set(int index, E element), add(int index, E element) and remove(int index)) on top of the list's list iterator, instead of the other way around.

To implement a list the programmer needs only to extend this class and provide implementations for the listIterator and size methods. For an unmodifiable list, the programmer need only implement the list iterator's hasNext, next, hasPrevious, previous and index methods.

For a modifiable list the programmer should additionally implement the list iterator's set method. For a variable-size list the programmer should additionally implement the list iterator's remove and add methods.

The programmer should generally provide a void (no argument) and collection constructor, as per the recommendation in the Collection interface specification.

This class is a member of the Java Collections Framework.
version1.36, 04/21/06
since1.2
See also java.util.Collection, java.util.List, java.util.AbstractList, java.util.AbstractCollection


Constructors
protected AbstractSequentialList()
Sole constructor. (For invocation by subclass constructors, typically implicit.)

Methods
public void add(int index, Object element) Details
Inserts the specified element at the specified position in this list (optional operation). Shifts the element currently at that position (if any) and any subsequent elements to the right (adds one to their indices).

This implementation first gets a list iterator pointing to the indexed element (with listIterator(index)). Then, it inserts the specified element with ListIterator.add.

Note that this implementation will throw an UnsupportedOperationException if the list iterator does not implement the add operation.
ThrowsUnsupportedOperationException: if the add operation is not supported by this list
ThrowsClassCastException: if the class of the specified element prevents it from being added to this list
ThrowsNullPointerException: if the specified element is null and this list does not permit null elements
ThrowsIllegalArgumentException: if some property of the specified element prevents it from being added to this list
ThrowsIndexOutOfBoundsException: if the index is out of range (index < 0 || index > size())

public boolean addAll(int index, Collection c) Details
Inserts all of the elements in the specified collection into this list at the specified position (optional operation). 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 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. (Note that this will occur if the specified collection is this list, and it's nonempty.)

This implementation gets an iterator over the specified collection and a list iterator over this list pointing to the indexed element (with listIterator(index)). Then, it iterates over the specified collection, inserting the elements obtained from the iterator into this list, one at a time, using ListIterator.add followed by ListIterator.next (to skip over the added element).

Note that this implementation will throw an UnsupportedOperationException if the list iterator returned by the listIterator method does not implement the add operation.
ThrowsUnsupportedOperationException: if the addAll operation is not supported by this list
ThrowsClassCastException: if the class of an element of the specified collection prevents it from being added to this list
ThrowsNullPointerException: if the specified collection contains one or more null elements and this list does not permit null elements, or if the specified collection is null
ThrowsIllegalArgumentException: if some property of an element of the specified collection prevents it from being added to this list
ThrowsIndexOutOfBoundsException: if the index is out of range (index < 0 || index > size())

public Object get(int index) Details
Returns the element at the specified position in this list.

This implementation first gets a list iterator pointing to the indexed element (with listIterator(index)). Then, it gets the element using ListIterator.next and returns it.
ThrowsIndexOutOfBoundsException: if the index is out of range (index < 0 || index >= size())

public Iterator iterator() Details
Returns an iterator over the elements in this list (in proper sequence).

This implementation merely returns a list iterator over the list.
returnan iterator over the elements in this list (in proper sequence)

abstract public ListIterator listIterator(int index) Details
Returns a list iterator over the elements in this list (in proper sequence).
indexindex of first element to be returned from the list iterator (by a call to the next method)
returna list iterator over the elements in this list (in proper sequence)
ThrowsIndexOutOfBoundsException: if the index is out of range (index < 0 || index > size())
public Object remove(int index) Details
Removes the element at the specified position in this list (optional operation). Shifts any subsequent elements to the left (subtracts one from their indices). Returns the element that was removed from the list.

This implementation first gets a list iterator pointing to the indexed element (with listIterator(index)). Then, it removes the element with ListIterator.remove.

Note that this implementation will throw an UnsupportedOperationException if the list iterator does not implement the remove operation.
ThrowsUnsupportedOperationException: if the remove operation is not supported by this list
ThrowsIndexOutOfBoundsException: if the index is out of range (index < 0 || index >= size())

public Object set(int index, Object element) Details
Replaces the element at the specified position in this list with the specified element (optional operation).

This implementation first gets a list iterator pointing to the indexed element (with listIterator(index)). Then, it gets the current element using ListIterator.next and replaces it with ListIterator.set.

Note that this implementation will throw an UnsupportedOperationException if the list iterator does not implement the set operation.
ThrowsUnsupportedOperationException: if the set operation is not supported by this list
ThrowsClassCastException: if the class of the specified element prevents it from being added to this list
ThrowsNullPointerException: if the specified element is null and this list does not permit null elements
ThrowsIllegalArgumentException: if some property of the specified element prevents it from being added to this list
ThrowsIndexOutOfBoundsException: if the index is out of range (index < 0 || index >= size())