public class DefaultListModel extends AbstractListModel
listenerList
Constructor and Description |
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DefaultListModel() |
DefaultListModel(Collection c) |
Modifier and Type | Method and Description |
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void |
add(int index,
Object element)
Inserts the specified element at the specified position in this list.
|
void |
addElement(Object obj)
Adds the specified component to the end of this list.
|
int |
capacity()
Returns the current capacity of this list.
|
void |
clear()
Removes all of the elements from this list.
|
boolean |
contains(Object elem)
Tests whether the specified object is a component in this list.
|
void |
copyInto(Object[] anArray)
Copies the components of this list into the specified array.
|
Object |
elementAt(int index)
Returns the component at the specified index.
|
Enumeration |
elements()
Returns an enumeration of the components of this list.
|
void |
ensureCapacity(int minCapacity)
Increases the capacity of this list, if necessary, to ensure
that it can hold at least the number of components specified by
the minimum capacity argument.
|
Object |
firstElement()
Returns the first component of this list.
|
Object |
get(int index)
Returns the element at the specified position in this list.
|
Object |
getElementAt(int index)
Returns the component at the specified index.
|
int |
getSize()
Returns the number of components in this list.
|
int |
indexOf(Object elem)
Searches for the first occurrence of
elem . |
int |
indexOf(Object elem,
int index)
Searches for the first occurrence of
elem , beginning
the search at index . |
void |
insertElementAt(Object obj,
int index)
Inserts the specified object as a component in this list at the
specified
index . |
boolean |
isEmpty()
Tests whether this list has any components.
|
Object |
lastElement()
Returns the last component of the list.
|
int |
lastIndexOf(Object elem)
Returns the index of the last occurrence of
elem . |
int |
lastIndexOf(Object elem,
int index)
Searches backwards for
elem , starting from the
specified index, and returns an index to it. |
Object |
remove(int index)
Removes the element at the specified position in this list.
|
void |
removeAllElements()
Removes all components from this list and sets its size to zero.
|
boolean |
removeElement(Object obj)
Removes the first (lowest-indexed) occurrence of the argument
from this list.
|
void |
removeElementAt(int index)
Deletes the component at the specified index.
|
void |
removeRange(int fromIndex,
int toIndex)
Deletes the components at the specified range of indexes.
|
Object |
set(int index,
Object element)
Replaces the element at the specified position in this list with the
specified element.
|
void |
setElementAt(Object obj,
int index)
Sets the component at the specified
index of this
list to be the specified object. |
void |
setSize(int newSize)
Sets the size of this list.
|
int |
size()
Returns the number of components in this list.
|
Object[] |
toArray()
Returns an array containing all of the elements in this list in the
correct order.
|
String |
toString()
Returns a string that displays and identifies this
object's properties.
|
void |
trimToSize()
Trims the capacity of this list to be the list's current size.
|
addListDataListener, fireContentsChanged, fireIntervalAdded, fireIntervalRemoved, getListDataListeners, getListeners, removeListDataListener
public DefaultListModel(Collection c)
public DefaultListModel()
public int getSize()
This method is identical to size
, which implements the
List
interface defined in the 1.2 Collections framework.
This method exists in conjunction with setSize
so that
size
is identifiable as a JavaBean property.
size()
public Object getElementAt(int index)
Note: Although this method is not deprecated, the preferred method to use isget(int)
, which implements theList
interface defined in the 1.2 Collections framework.
index
- an index into this listArrayIndexOutOfBoundsException
- if the index
is negative or greater than the current size of this
listget(int)
public void copyInto(Object[] anArray)
IndexOutOfBoundsException
is thrown.anArray
- the array into which the components get copiedVector.copyInto(Object[])
public void trimToSize()
Vector.trimToSize()
public void ensureCapacity(int minCapacity)
minCapacity
- the desired minimum capacityVector.ensureCapacity(int)
public void setSize(int newSize)
newSize
- the new size of this listVector.setSize(int)
public int capacity()
Vector.capacity()
public int size()
Vector.size()
public boolean isEmpty()
true
if and only if this list has
no components, that is, its size is zero;
false
otherwiseVector.isEmpty()
public Enumeration elements()
Vector.elements()
public boolean contains(Object elem)
elem
- an objecttrue
if the specified object
is the same as a component in this listVector.contains(Object)
public int indexOf(Object elem)
elem
.elem
- an object-1
if the object is not foundVector.indexOf(Object)
public int indexOf(Object elem, int index)
elem
, beginning
the search at index
.elem
- an desired componentindex
- the index from which to begin searchingelem
is found after index
; returns -1
if the elem
is not found in the listVector.indexOf(Object,int)
public int lastIndexOf(Object elem)
elem
.elem
- the desired componentelem
in the list; returns -1
if the object is not foundVector.lastIndexOf(Object)
public int lastIndexOf(Object elem, int index)
elem
, starting from the
specified index, and returns an index to it.elem
- the desired componentindex
- the index to start searching fromelem
in this list at position less than index
;
returns -1
if the object is not foundVector.lastIndexOf(Object,int)
public Object elementAt(int index)
ArrayIndexOutOfBoundsException
if the index
is negative or not less than the size of the list.
Note: Although this method is not deprecated, the preferred method to use isget(int)
, which implements theList
interface defined in the 1.2 Collections framework.
index
- an index into this listget(int)
,
Vector.elementAt(int)
public Object firstElement()
NoSuchElementException
if this
vector has no components.Vector.firstElement()
public Object lastElement()
NoSuchElementException
if this vector
has no components.Vector.lastElement()
public void setElementAt(Object obj, int index)
index
of this
list to be the specified object. The previous component at that
position is discarded.
Throws an ArrayIndexOutOfBoundsException
if the index
is invalid.
Note: Although this method is not deprecated, the preferred method to use isset(int,Object)
, which implements theList
interface defined in the 1.2 Collections framework.
obj
- what the component is to be set toindex
- the specified indexset(int,Object)
,
Vector.setElementAt(Object,int)
public void removeElementAt(int index)
Throws an ArrayIndexOutOfBoundsException
if the index
is invalid.
Note: Although this method is not deprecated, the preferred method to use isremove(int)
, which implements theList
interface defined in the 1.2 Collections framework.
index
- the index of the object to removeremove(int)
,
Vector.removeElementAt(int)
public void insertElementAt(Object obj, int index)
index
.
Throws an ArrayIndexOutOfBoundsException
if the index
is invalid.
Note: Although this method is not deprecated, the preferred method to use isadd(int,Object)
, which implements theList
interface defined in the 1.2 Collections framework.
obj
- the component to insertindex
- where to insert the new componentArrayIndexOutOfBoundsException
- if the index was invalidadd(int,Object)
,
Vector.insertElementAt(Object,int)
public void addElement(Object obj)
obj
- the component to be addedVector.addElement(Object)
public boolean removeElement(Object obj)
obj
- the component to be removedtrue
if the argument was a component of this
list; false
otherwiseVector.removeElement(Object)
public void removeAllElements()
Note: Although this method is not deprecated, the preferred method to use isclear
, which implements theList
interface defined in the 1.2 Collections framework.
clear()
,
Vector.removeAllElements()
public String toString()
public Object[] toArray()
Vector.toArray()
public Object get(int index)
Throws an ArrayIndexOutOfBoundsException
if the index is out of range
(index < 0 || index >= size()
).
index
- index of element to returnpublic Object set(int index, Object element)
Throws an ArrayIndexOutOfBoundsException
if the index is out of range
(index < 0 || index >= size()
).
index
- index of element to replaceelement
- element to be stored at the specified positionpublic void add(int index, Object element)
Throws an ArrayIndexOutOfBoundsException
if the
index is out of range
(index < 0 || index > size()
).
index
- index at which the specified element is to be insertedelement
- element to be insertedpublic Object remove(int index)
Throws an ArrayIndexOutOfBoundsException
if the index is out of range
(index < 0 || index >= size()
).
index
- the index of the element to removedpublic void clear()
public void removeRange(int fromIndex, int toIndex)
Throws an ArrayIndexOutOfBoundsException
if the index was invalid.
Throws an IllegalArgumentException
if
fromIndex > toIndex
.
fromIndex
- the index of the lower end of the rangetoIndex
- the index of the upper end of the rangeremove(int)