Java Reference
In-Depth Information
Display 16.4
Selected Methods in the
List<T>
Interface
(part 2 of 3)
public boolean
addAll(Collection<? extends T> collectionToAdd)
(Optional
)
Adds all of the elements in
collectionToAdd
to the end of the calling object's list. The elements
are added in the order they are produced by an iterator for
collectionToAdd
.
public boolean
remove(Object element)
(Optional)
Removes the first occurrence of element from the calling object's list, if it is present. Returns
true
if the calling object contained the element; returns
false
otherwise.
public boolean
removeAll(Collection<?> collectionToRemove)
(Optional)
Removes all the calling object's elements that are also in
collectionToRemove
. Returns
true
if the calling object was changed; otherwise returns
false
.
NEW METHOD HEADINGS
The following methods are in the
List<T>
interface but were not in the
Collection<T>
interface. Those that are optional are noted.
public void
add(int index, T newElement)
(Optional)
Inserts
newElement
in the calling object's list at location
index
. The old elements at location
index
and higher are moved to higher indices.
public boolean
addAll(int index,
Collection<? extends T> collectionToAdd)
(Optional)
Inserts all of the elements in
collectionToAdd
to the calling object's list starting at location
index
. The old elements at location
index
and higher are moved to higher indices. The elements
are added in the order they are produced by an iterator for
collectionToAdd
.
public
T get(int index)
Returns the object at position
index
.
public
T set(int index, T newElement)
(Optional)
Sets the element at the specified index to
newElement
. The element previously at that position
is returned.
public
T remove(int index)
(Optional)
Removes the element at position
index
in the calling object. Shifts any subsequent elements to
the left (subtracts one from their indices). Returns the element that was removed from the calling
object.
public int
indexOf(Object target)
Returns the index of the first element that is equal to
target
. Uses the method
equals
of the
object
target
to test for equality. Returns
1
if
target
is not found.
(continued)
