TopBlend:
Here is the
first difference.
There are 60 differences.
is old.
is new.
java.util
Class AbstractSequentialList<E>
java.lang.Object
java.util.AbstractCollection<E>
java.util.AbstractList<E>
java.util.AbstractSequentialList<E>
-
All Implemented Interfaces:
-
Iterable
<E>,
Collection
<E>,
List
<E>
-
Direct Known Subclasses:
-
LinkedList
-
public abstract class AbstractSequentialList<E>
- extends AbstractList<E>
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
Object
element)
,
add(int
set(int
index,
E
Object
element)
,
add(int index, Object 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
.
-
Since:
-
1.2
-
See Also:
-
Collection
,
List
,
AbstractList
,
AbstractCollection
Method Summary
|
void |
add
(int index,
E
Inserts the specified element at the specified position in this
list (optional operation).
list.
|
boolean |
addAll
(int index,
Collection
<? extends
E
Inserts all of the elements in the specified collection into this list at the specified
position (optional operation).
position.
|
E
|
get
(int index)
Returns the element at the specified position in this list. |
Iterator
<
E
> |
iterator
()
Returns an iterator over the elements in this list (in proper sequence). |
abstract
ListIterator
<
E
> |
listIterator
(int index)
Returns a list iterator over the elements in this list (in proper sequence). |
E
|
remove
(int index)
Removes the element at the specified position in this
list (optional operation).
list.
|
E
|
set
(int index,
E
Replaces the element at the specified position in this list with the specified
element (optional operation).
element.
|
Methods inherited from class java.util.
AbstractCollection
|
addAll
,
contains
,
containsAll
,
isEmpty
,
remove
,
removeAll
,
retainAll
,
size
,
toArray
,
toArray
,
toString
|
AbstractSequentialList
protected AbstractSequentialList()
-
Sole constructor. (For invocation by subclass constructors, typically implicit.)
get
public E get(int index)
-
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.
-
-
Specified by:
-
get
in interface
List
<
E
>
-
Specified by:
-
get
in class
AbstractList
<
E
>
-
-
Parameters:
-
index - index of
the
element to
return
return.
-
Returns:
-
the element at the specified position in this
list
list.
-
Throws:
-
IndexOutOfBoundsException
- if the
specified
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 (optional operation).
element.
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.
-
-
Specified by:
-
set
in interface
List
<
E
>
-
Overrides:
-
set
in class
AbstractList
<
E
>
-
-
Parameters:
-
index - index of
the
element to
replace
replace.
-
element - element to be stored at the specified
position
position.
-
Returns:
-
the element previously at the specified
position
position.
-
Throws:
-
UnsupportedOperationException
-
if the
set
operation
is not supported by this
list
list.
-
ClassCastException
NullPointerException
- if the class of the specified element prevents it from being added to this list
- this list does not permit null elements and one of the elements of c is null.
-
NullPointerException
ClassCastException
- if the specified element is null and this list does not permit null elements
- class of the specified element prevents it from being added to this list.
-
IllegalArgumentException
-
if
some
property
aspect
of the specified element prevents it from being added to this
list
list.
-
IndexOutOfBoundsException
-
if the
index
is
out of range
(
index
(index
< 0 || index >= size()
)
).
-
IllegalArgumentException
- fromIndex > toIndex.
add
public void add(int index,
E element)
-
Inserts the specified element at the specified position in this
list (optional operation).
list.
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.
-
-
Specified by:
-
add
in interface
List
<
E
>
-
Overrides:
-
add
in class
AbstractList
<
E
>
-
-
Parameters:
-
index - index at which the specified element is to be
inserted
inserted.
-
element - element to be
inserted
inserted.
-
Throws:
-
UnsupportedOperationException
- if the
add
operation is not supported by this
list
list.
-
ClassCastException
NullPointerException
- if the class of the specified element prevents it from being added to this list
- this list does not permit
null
elements and one of the elements of c is
null
.
-
NullPointerException
ClassCastException
- if the specified element is null and this list does not permit null elements
- if the class of the specified element prevents it from being added to this list.
-
IllegalArgumentException
- if some
property
aspect
of the specified element prevents it from being added to this
list
list.
-
IndexOutOfBoundsException
- if the
specified
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 (optional operation).
list.
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.
-
-
Specified by:
-
remove
in interface
List
<
E
>
-
Overrides:
-
remove
in class
AbstractList
<
E
>
-
-
Parameters:
-
index -
the
index of the element to be removed
from the List.
-
Returns:
-
the element previously at the specified position
the element that was removed from the list.
-
Throws:
-
UnsupportedOperationException
- if the
remove
operation is not supported by this
list
list.
-
IndexOutOfBoundsException
- if the
specified
index is out of range
(
index
(index
< 0 || index >=
size()
)
size()).
addAll
public 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).
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
this
the
list in the order that they are returned by the specified collection's iterator. The behavior of this operation is
undefined
unspecified
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.)
Optional operation.
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.
-
-
Specified by:
-
addAll
in interface
List
<
E
>
-
Overrides:
-
addAll
in class
AbstractList
<
E
>
-
-
Parameters:
-
index - index at which to insert
the
first element from the specified
collection
collection.
-
c -
collection containing
elements to be
added to
inserted into
this
list
list.
-
Returns:
-
true
if this list changed as a result of the
call
call.
-
Throws:
-
UnsupportedOperationException
- if the
addAll
operation is not supported by this
list
list.
-
ClassCastException
NullPointerException
- if the class of an element of the specified collection prevents it from being added to this list
- this list does not permit
null
elements and one of the elements of the specified collection is
null
.
-
NullPointerException
ClassCastException
- 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
- if the class of the specified element prevents it from being added to this list.
-
IllegalArgumentException
- if some
property
aspect
of
an element of
the specified
collection
element
prevents it from being added to this
list
list.
-
IndexOutOfBoundsException
- if the
specified
index is out of range (
index < 0 || index > size()
)
).
-
NullPointerException
- if the specified collection is null.
iterator
public Iterator<E> iterator()
-
Returns an iterator over the elements in this list (in proper sequence).
This implementation merely returns a list iterator over the list.
-
-
Specified by:
-
iterator
in interface
Iterable
<
E
>
-
Specified by:
-
iterator
in interface
Collection
<
E
>
-
Specified by:
-
iterator
in interface
List
<
E
>
-
Overrides:
-
iterator
in class
AbstractList
<
E
>
-
-
Returns:
-
an iterator over the elements in this list (in proper
sequence)
sequence).
-
See Also:
-
AbstractList.modCount
listIterator
public abstract ListIterator<E> listIterator(int index)
-
Returns a list iterator over the elements in this list (in proper sequence).
-
-
Specified by:
-
listIterator
in interface
List
<
E
>
-
Overrides:
-
listIterator
in class
AbstractList
<
E
>
-
-
Parameters:
-
index - index of first element to be returned from the list iterator (by a call to the next method)
-
Returns:
-
a list iterator over the elements in this list (in proper
sequence)
sequence).
-
Throws:
-
IndexOutOfBoundsException
- if the index is out of range (
index < 0 || index > size()
)
-
See Also:
-
AbstractList.modCount